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Background: The Northridge earthquake struck Los Angeles on 17 January 1994, originating from a previously unknown thrust fault. The earthquake measured 6.7 on the Richter scale and caused extensive damage to buildings, utilities and roadways. This report describes injuries occurring in the Northridge earthquake which resulted in death or hospital admission.Methods: Earthquake-related deaths were identified by the Los Angeles Department of the Coroner. All 78 hospitals in Los Angeles County were screened for earthquake-related admissions and were found in 16 of them. Coroner's records and medical records from the 16 hospitals were individually reviewed to identify earthquake-related injuries and to obtain information about the injury.Results: A total of 171 earthquake-related injuries was identified in Los Angeles County, 33 were fatal and 138 required hospital admission. Injury rates were approximately equal by gender and increased significantly with increasing age. Most of the fatalities were due to building collapse, and most of the hospital-admitted injuries were caused by falls or being hit by objects. Motor vehicle injuries and burns were also common causes of injury. Head and chest injuries were common among fatalities, and extremity injuries were the most common among those admitted to a hospital.Conclusion: Earthquakes cause injuries through many mechanisms, and a clearer understanding of these pathways can help focus prevention strategies. Research combining comprehensive surveillance with risk factor assessment can help identify behaviours and circumstances increasing the risk of injury in an earthquake. [ABSTRACT FROM AUTHOR]

Background: In Euro-Western forms of research, Indigenous Knowledges (IK) and Knowledge systems have been misused, devalued, and stolen. Elders and Knowledge Guardians have expressed the need for IK to be protected for future generations and be included in research in a good way., Objectives: We aim to disrupt the ongoing dominance of Eurocentric research methodologies focused on Indigenous Peoples by promoting and nurturing rights-based and distinctions-based approaches that center Indigenous ways of knowing, being and doing within the entirety of this research project., Methods: This protocol paper describes how we developed an Indigenous-informed realist review process and what the process entails. When conducting our realist review, we will examine papers indicating that IK were centered in research. Our iterative process is shaped and guided by IK within our team. To be included in the analysis, papers must (1) identify how Indigenous Peoples were leading, guiding, and/or governing the research; (2) describe how IK were a critical component of research; and (3) report on how the research benefitted Indigenous Peoples. All papers that meet our inclusion criteria will be scored using a relevance assessment tool we developed to assess how much information was provided on the local context for the Indigenous research, the outcomes from the IK in research, and the processes that facilitated the research outcomes., Conclusions: Our intention is to synthesize and amplify how IK have been centered in research, across multiple disciplines and geographies, to benefit Indigenous Peoples. We focus on nurturing and fostering ways of doing Indigenous research and including IK in a way that supports the well-being of Indigenous Peoples.

Rural and remote Indigenous communities face unique challenges, and they must drive solutions for sustaining and maintaining distinct nursing practices. Resourcing Indigenous community needs and aspirations for health depends on sustainable funding and an appropriately resourced nursing workforce. An Indigenous community-engaged research team led a program of study exploring Indigenous systems of care with three distinct communities. We used Indigenous research methodologies to identify obstacles to care and ways to advance nursing and healthcare delivery according to unique values and demographical and geographical influences. Using a collaborative analysis approach with communities, we identified themes related to resourcing nursing positions, supporting nursing education and valuing nursing influence in determining program priorities. The voice of the community in research is a powerful force for advocacy, ensuring that nurses are supported in relationships with communities and in designing programs that fit the community's vision for health and wellness. We recognize the essential contributions of nurse leaders to policy processes in formulating and coordinating ideas for program redesign across and within levels of organizations for health and social justice impacts. We conclude our paper by noting implications for nursing leadership in diverse settings with the goal of sustaining a nursing workforce to provide culturally safe, wellness-focused care., (Copyright © 2023 Longwoods Publishing.)

La recherche en santé autochtone au Canada a été négligée dans le passé et qualifiée de problématique, notamment en raison du manque de collaboration avec les peuples autochtones. L'Énoncé de politique des trois Conseils sur l'éthique de la recherche avec des êtres humains décrit au chapitre 9 la conduite éthique de la recherche axée sur les Premières nations, les Inuits et les Métis. Les principes PCAP® des Premières nations (propriété, contrôle, accès et possession) soulignent l'importance majeure de l'engagement et de la gouvernance autochtones. En vue d'assurer que les buts et les activités de la recherche développée soient réalisés en partenariat complet et significatif avec les peuples et les communautés autochtones, il est possible de faire appel à des méthodes de recherche participative communautaire (RPC) intégrant leur plein engagement. Les recherches utilisant des ensembles de données secondaires, telles que les données administratives sur la santé recueillies en routine, ne devraient plus être exclues de cette approche. Notre objectif était de décrire comment notre équipe de chercheurs universitaires, alliée à un organisme national de santé autochtone, a adapté les méthodes de RPC dans le cadre d'un projet de recherche utilisant des données recueillies antérieurement pour examiner les lacunes dans la prestation de soins de fin de vie aux peuples autochtones en Ontario. Nous décrivons le processus d'élaboration de ce partenariat de recherche et expliquons comment l'intégration des principes de base et des processus de formation du savoir autochtones ont guidé cette collaboration. Notre partenariat de recherche, qui implique l'adaptation de méthodes de RPC, illustre un processus d'engagement qui pourrait guider d'autres chercheurs désirant mener des recherches en santé autochtone à l'aide de données déjà recueillies. Nous faisons aussi état d'une entente de recherche transparente, négociée équitablement entre un organisme national de santé autochtone et des chercheurs, qui pourrait servir de cadre pour des collaborations de recherche similaires. Il est essentiel de s'assurer que les perspectives autochtones soient au cœur des processus de recherche et qu'elles soient reflétées dans ceux-ci lorsque des données administratives sur la santé sont utilisées., Indigenous health research in Canada has a chequered past and has been identified as problematic and lacking in appropriate collaboration with Indigenous people. The Tri-Council Policy Statement on Ethical Conduct for Research Involving Humans, Chapter 9 describes ethical conduct of research regarding First Nations, Inuit, and Métis Peoples. First Nations Ownership, Control, Access, and Possession (OCAP®) Principles highlight the necessity of Indigenous engagement and governance. To ensure that the aims and activities of the research being developed are in full and meaningful partnership with Indigenous peoples and communities, community-based participatory research (CBPR) methods provide a process in which full engagement is possible. Research utilizing secondary data sets, such as routinely collected health administrative data, should no longer be excluded from this approach. Our aim was to describe how our research team of academic researchers and a national Indigenous health organization adapted CBPR methods in a research project using previously collected data to examine end-of-life health care service delivery gaps for Indigenous people in Ontario. We describe the process of how we developed our research partnership and how grounding principles and Indigenous ways of knowing guided our work together. Through the adaptation of CBPR methods, our research partnership illustrates a process of engagement that can guide others hoping to conduct Indigenous health research using previously collected data. We also present a transparent research agreement negotiated equally by a national Indigenous health organization and research scientists, which can also be used as a framework for others wishing to establish similar research partnerships. Ensuring that Indigenous perspectives are central to and reflected in the research process is essential when using health administrative data.

Background: Blepharitis is an ocular surface disease and chronic ophthalmic condition. This paper reports on the development of psychometric evaluation of a patient-reported measure of blepharitis symptoms., Methods: Self-reports of 13 blepharitis symptoms collected in a Phase 3 multi-site, randomized, double-masked, 4-arm parallel group, clinical trial of 907 individuals with blepharitis (mean age = 62, range: 19-93; 57% female) were analyzed. Symptoms asked about were: eyes that itch; eyes that burn; eyelids feel heavy or puffy; feel like something is in your eye; dry eyes; gritty eyes; irritated eyes; eyes that tear or water; crusty eyes; flaking from your eyelids; eyelids that are stuck together; red eyes or eyelids; and debris like pieces of skin or dandruff in your eyes., Results: Categorical factor analyses provided support for two multi-item symptom scales: Irritation (9 items, alpha = 0.88) and Debris (4 items, alpha = 0.85). Spearman-rank order correlations of the Irritation and Debris scales with the Ocular Surface Disease total score were 0.63 and 0.41, respectively (p's < 0.001). Rank-order correlations between ratings of clinicians and self-reports of puffy eyes (r = 0.07, p < .05), red eyes (r = 0.12, p < .001), debris (r = 0.03, p > 0.05), and irritation (r = 0.47, p < .001)., Conclusions: This study provides support for the psychometric properties and construct validity of the Irritation and Debris scales for assessing symptoms of blepharitis. The associations between the self-reports and clinician ratings of 4 symptoms indicate substantial unique information in the new self-reported symptom items., Trial Registration: The trial was registered at ClinicalTrials.gov under the registry number NCT01408082 .

Background: Preexposure prophylaxis (PrEP) has emerged as a human immunodeficiency virus (HIV) prevention tool for populations at highest risk for HIV infection. Current US Centers for Disease Control and Prevention (CDC) guidelines for identifying PrEP candidates may not be specific enough to identify gay, bisexual, and other men who have sex with men (MSM) at the highest risk for HIV infection. We created an HIV risk score for HIV-negative MSM based on Syndemics Theory to develop a more targeted criterion for assessing PrEP candidacy., Methods: Behavioral risk assessment and HIV testing data were analyzed for HIV-negative MSM attending the Los Angeles LGBT Center between January 2009 and June 2014 (n = 9481). Syndemics Theory informed the selection of variables for a multivariable Cox proportional hazards model. Estimated coefficients were summed to create an HIV risk score, and model fit was compared between our model and CDC guidelines using the Akaike Information Criterion and Bayesian Information Criterion., Results: Approximately 51% of MSM were above a cutpoint that we chose as an illustrative risk score to qualify for PrEP, identifying 75% of all seroconverting MSM. Our model demonstrated a better overall fit when compared with the CDC guidelines (Akaike Information Criterion Difference = 68) in addition to identifying a greater proportion of HIV infections., Conclusions: Current CDC PrEP guidelines should be expanded to incorporate substance use, partner-level, and other Syndemic variables that have been shown to contribute to HIV acquisition. Deployment of such personalized algorithms may better hone PrEP criteria and allow providers and their patients to make a more informed decision prior to PrEP use.

Background: Geosocial networking applications (GSN apps) used for meeting sexual partners have become increasingly popular with men who have sex with men (MSM) since 2009. The current study aimed to determine if self-identified HIV-negative, MSM clinic attendees who used GSN apps have an increased incidence of sexually transmitted infections (STI) compared to self-identified HIV-negative, MSM attendees who met sexual partners via in-person venues, such as bars or clubs or through MSM-specific hook-up websites., Methods: Data were collected between August 2011 and January 2013 on all self-identified HIV-negative, MSM clients visiting the L.A. Gay & Lesbian Center for STI screening. A total of 7184 individuals tested for STIs and self-reported behaviours on drug use and social networking methods to meet sexual partners. Multivariate logistic regression models were used to analyse the results., Results: Individuals who used GSN apps for meeting sexual partners had greater odds of testing positive for gonorrhoea (OR: 1.25; 95% CI 1.06 to 1.48) and for chlamydia (OR: 1.37; 95% CI 1.13 to 1.65) compared to individuals who met partners through in-person methods only. There were no significant differences in syphilis and HIV incidence between those who met partners via in-person venues only, on the internet or through GSN apps., Conclusions: The present study concludes that sexual health clinic MSM attendees who are meeting on GSN apps are at greater risk for gonorrhoea and chlamydia than MSM attendees who meet in-person or on the internet. Future interventions should explore the use of these novel technologies for testing promotion, prevention and education., (Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.)

Asthma and allergies are common conditions among Aboriginal children and adolescents. The purpose of this study was to assess the health and health-care inequities experienced by affected children and by their parents. Aboriginal research assistants conducted individual interviews with 46 Aboriginal children and adolescents who had asthma and/or allergies (26 First Nations, 19 Métis, 1 Inuit) and 51 parents or guardians of these children and adolescents. Followup group interviews were conducted with 16 adolescents and 25 parents/ guardians. Participants reported inadequate educational resources, environmental vulnerability, social and cultural pressures, exclusion, isolation, stigma, blame, and major support deficits. They also described barriers to health-service access, inadequate health care, disrespectful treatment and discrimination by health-care providers, and deficient health insurance. These children, adolescents, and parents recommended the establishment of culturally appropriate support and education programs delivered by Aboriginal peers and health professionals.

We propose a shift in emphasis when communicating to people when the objective is to motivate household disaster preparedness actions. This shift is to emphasize the communication of preparedness actions (what to do about risk) rather than risk itself. We have called this perspective "communicating actionable risk," and it is grounded in diffusion of innovations and communication theories. A representative sample of households in the nation was analyzed using a path analytic framework. Preparedness information variables (including content, density, and observation), preparedness mediating variables (knowledge, perceived effectiveness, and milling), and preparedness actions taken were modeled. Clear results emerged that provide a strong basis for communicating actionable risk, and for the conclusion both that information observed (seeing preparedness actions that other have taken) and information received (receiving recommendations about what preparedness actions to take) play key, although different, roles in motivating preparedness actions among the people in our nation., (© 2011 Society for Risk Analysis.)

Following the 1994 Northridge earthquake, the psychometric properties of the Civilian Mississippi scale (CMS) were examined in three ethnic language subgroups (non-Latino-English, Latino-English, and Latino-Spanish). The psychometric patterns corroborated the existence of two subscales: 25 items with regular wording and 10 items with reversed wording. Psychometric properties were examined in relation to demographics, earthquake exposure, trauma, and psychological distress as measured by the Brief Symptom Inventory. The results suggest that items with reversed wording generated significantly higher mean posttraumatic stress disorder (PTSD) scores and lower reliability. Latinos and Spanish-speaking respondents had particular difficulty understanding items with reversed wording, which correlates with significantly lower or no correlation between the CMS-PTSD and psychological distress.

Basic first-aid skills can be useful in treating minor injuries that commonly result from natural disasters in the United States. Yet there has been insufficient research on training and competence in first-aid skills among community residents. This study utilises panel data for 414 adults in Los Angeles, California, who were interviewed within three years of the 1994 Northridge earthquake and re-interviewed in 1999 after the El Ninõ winter of 1997-98. Descriptive, bivariate and multivariate analyses were performed. Results showed that 24 percent of the members of the sample had received first-aid training since their Northridge earthquake interview. First-aid training, particularly recent training, was associated with greater perceived first-aid skills, as well as with increased expected and actual employment of those skills. With the appropriate training and skill retention, lay members of the public can potentially contribute to a post-disaster medical response.

Purpose: To evaluate factors related to the quality of vision after LASIK., Design: Survey study., Participants: One hundred consecutive patients., Intervention: LASIK with a 6.0-mm elliptical ablation pattern without transition zone to treat mild to moderate myopia or astigmatism (preoperative manifest spherical equivalent [MSE], -4.79 +/- 1.33 diopters [D]; range, -2.88 to -9.25 D). The second eye was treated 1 month after the first., Main Outcome Measures: Completed questionnaires assessing night vision problems (glare, haze, and halo symptoms) before surgery and at 1, 3, and 6 months after surgery in 97, 75, 81, and 66 subjects, respectively. Mesopic pupil size and preoperative and postoperative variables were analyzed with questionnaire data using an analysis of variance (ANOVA) and multivariate regression analysis., Results: Patients with large mesopic pupils had significantly more reports of glare, haze, and halo than did those with smaller pupils in the treated eye at 1 month after surgery (P=0.02, P=0.03, and P=0.02, respectively ANOVA) and of glare at 3 months (P=0.05). Significant predictors of symptoms at 6 months, identified through multivariate regression analysis, included preoperative MSE (for glare and haze), preoperative contrast acuity (glare), postoperative uncorrected visual acuity (UCVA; haze), and residual cylinder (haze). Together, these factors accounted for only 19% of the overall variability in glare and 37% of the variability in haze responses. No relationship between pupils and symptoms was noted at 6 months after surgery in either the ANOVA or regression analysis group., Conclusions: Patients with large pupils had more quality of vision symptoms in the early postoperative period, but no correlation was observed 6 months after surgery. Factors related to long-term symptoms include the level of treatment (preoperative myopia), preoperative contrast acuity, postoperative UCVA, and residual cylinder. Most of the variability in visual quality could not be explained by preoperative or clinical outcome measures, including pupil size.

Purpose: The purpose of this study was to use emergency department data to estimate levels of morbidity and risk factors due to earthquake-related mechanisms of injury subsequent to an urban night-time earthquake., Methods: Data were abstracted from 4190 medical records for the month of January, 1994. Injuries attributable to the earthquake were identified through emergency department and medical records. These injuries were: (a) categorized by mechanism of injury; (b) assigned an injury severity score; and (c) linked to structural and geologic data. Proportional polytomous and dichotomous logistic regression were used to estimate risk of more severe injury associated with demographic characteristics, injury characteristics, structural characteristics, and geologic factors., Results: More severe earthquake-related injuries (serious versus moderate and moderate versus minor) were statistically significantly associated with patient age (> or = 60 years old), upper extremities, falling, multi-family structures, pre-1960 housing, and the 50th percentile of Peak Ground Acceleration, after adjusting for all other available demographic, injury, structural, and geologic characteristics., Conclusions: The current recommendation of 'duck, cover, and hold' might not be optimal during a nighttime earthquake, particularly if individuals are in the padded environment of the bed. Actions such as reaching for or catching objects, bracing, or holding onto perceived stable objects may increase risk for more serious injury. Alternate responses include assuming a tucked position (as in airline crashes) or staying in bed for non-ambulating people. Structural damage and structure size were not associated with more serious injuries, but structure use and age were, leading the authors to suspect that unmeasured socioeconomic factors might impact risk factors. The importance of including population demographic characteristics in hazard modeling is emphasized.

This study examines psychometric properties of the Civilian Mississippi Scale for posttraumatic stress disorder when administered in a community survey of 656 persons following the 1989 Loma Prieta earthquake. Internal consistency was lower (Cronbach's alpha = .73) than for previous analyses of civilian and combat versions of the Mississippi Scale. The analysis produced one strong factor composed of 25 items with regular wording and a second, weaker factor composed of 10 items with reversed wording. Internal consistency was higher when the 10 reversed items were removed (Cronbach's alpha = .86); the two factors were negatively correlated. Traumatic experiences and psychological distress measures explained more variance in the 25-item factor than in the 35-item scale. Further studies should focus on content analysis and performance of the reversed items.

This study describes the prevalence and correlates of physical assaults, threats of assault, and workers' perceptions of safety in selected urban employment settings. Questionnaires were mailed to a random sample of 1,763 persons working at various jobs and sites throughout Los Angeles County. Workers were asked to describe their work environments, their perceptions of personal safety at work, and physical assaults and threats they had experienced. Three percent of the respondents reported being assaulted within the previous year and 14% reported being threatened within the previous 30 days. Younger workers, more educated workers, and those who worked with clients or patients were more likely to report assaults. Approximately one third of those who reported threats or assaults described the perpetrator(s) as clients, patients, or persons in legal custody, and one third described the perpetrator(s) as co-workers or supervisors. Fifty-two percent of the workers reported being concerned about their safety at work.

Purpose: To compare the 2 most popular commercially available topical nonsteroidal anti-inflammatory drugs (NSAIDs) in the treatment of ocular pain following radial keratotomy (RK)., Setting: Multicenter clinical trial., Methods: Ninety-seven RK patients were randomly assigned to 1 of 3 treatment groups: ketorolac tromethamine, diclofenac sodium, and moist drops as a control. The patients used 1 drop of the masked medication and 1 drop of ofloxacin 3 times a day for 3 days prior to surgery. They received 1 drop of the masked medication 1 hour before surgery, immediately after surgery, and 4 times a day thereafter. Patients were given a written questionnaire preoperatively and were also instructed to call a central computerized telephone system to answer prerecorded questions about ocular comfort. The calls were placed 30 minutes and 1, 2, 3, 4, 5, 6, 24, and 48 hours after surgery., Results: Two hundred ten statistical values were calculated to compare symptoms in the unoperated eye at baseline with symptoms in the operated eyes at each of 9 postoperative time points. Only 7 of the 210 values (3.3%) were significantly different among patient groups (operated versus unoperated eyes) by psychometric testing., Conclusions: Both ketorolac tromethamine and diclofenac sodium were more effective in reducing post-RK discomfort than the control (moist artificial tears). Given the large number of tests and the small number that tested as significant, the significant differences (7 of 210 measurements) observed among the 3 treatment groups probably occurred by chance, although the improved foreign-body sensation, functionality, and compliance scores in the ketorolac group during the first 4 hours might be clinically important.

Background: The purpose of this study was to assess the impact of an intervention to facilitate information giving to patients with chronic medical conditions on outcomes of care., Methods: A consecutive sample of 276 eligible patients with chronic medical conditions at a family medicine clinic was randomized to control and experimental interventions. A total of 205 completed the study. Experimental group patients received copies of their medical record progress notes, and they completed question lists for physician review, while control group patients received health education sheets and completed suggestion lists for improving clinic care. Self-reported physical functioning, global health, and patient satisfaction and adherence were measured at enrollment and after the interventions. Visit lengths and patient response to medical record sharing after the interventions were also measured., Results: After the intervention, experimental group patients reported 3.7% better overall physical functioning than did control patients (mean = 83.6, standard deviation [SD] = 17.6 vs mean = 79.9, SD = 25.3; P = .005 after adjusting for covariates). The experimental group was more satisfied with their physician's care (mean = 31.4, SD = 4.6 vs mean = 31.3, SD = 5.2; P = .045 after adjusting for covariates). They were also more interested in seeing their medical records than were control patients (mean = 12.0, SD = 2.8 vs mean = 11.2, SD = 2.8; P = .002 after adjusting for covariates). Experimental group patients also reported an 8.3% improvement in overall health status (postintervention mean = 3.0, SD = 1.1) compared with their pre-intervention health status (mean = 2.8, SD = 1.0; P =.001). Visit lengths for patients in the experimental group did not differ from those of the control group., Conclusions: A simple patient-centered intervention to facilitate information giving in the primary health care of patients with chronic medical conditions can improve self-reported health, physical functioning, and satisfaction with care.

The devastating effects of earthquakes have been demonstrated repeatedly in the past decade, through moderate and major earthquakes such as the October 1987 Whittier Narrows earthquake (5.9 on the Richter scale), the October 1989 Loma Prieta earthquake (7.1) and the January 1994 Northridge earthquake (6.7). While 'official' tallies of injuries and deaths are reported for each event, the numbers vary from report to report. For Northridge, the number of injuries vary between 8,000 and 12,000; the number of deaths from 33 to 73 (Peek-Asa et al., 1997; Durkin, 1996). While official estimates are commonly reported following disasters, the study of actual numbers, types and causes of casualties has not developed. In this paper, we identify the numbers and risk factors for injuries within community-based samples across three earthquakes in urban California. We first report the numbers and types of injuries in each earthquake and then identify risk factors specifically associated with the Northridge earthquake.

Background: Patients in the Prospective Evaluation of Radial Keratotomy (PERK) Study stated that a major reason for obtaining radial keratotomy was to see without dependence on corrective lenses. The authors examined lens-wearing patterns 6 years after surgery., Methods: Of the 435 patients in the PERK Study, the authors analyzed the responses of 328 (75.4%) who elected to have surgery on both eyes, who completed a questionnaire at 6 years, and for whom visual acuity and cycloplegic refraction were available., Results: Sixty-four percent (106/167) of patients younger than 40 years of age and 38% (64/161) of patients older than 40 years of age wore no lenses for distance or near vision. The proportion of time lenses were worn increased with age for those who wore them for close work only (from 18% younger than 40 years of age to 25% older than 40 years of age) and decreased with age for those who wore them for distance only (from 41% to 27%). The authors examined the visual acuity and refractive error criteria for patients to be free of distance lenses. Of the 359 patients who saw 20/20 or better uncorrected in one or both eyes, 77% (n = 198) wore no distance correction, whereas of the 53 patients who saw 20/25 to 20/40 in both eyes or their best eye, only 34% (n = 18) wore no distance correction. Of the 72 patients with a residual refractive error of +/- 0.50 diopters (D) in both eyes, 85% (n = 61) wore no distance correction, whereas of the 87 patients with +/- 1.00 D in both eyes, only 39% (n = 34) wore no distance correction. Of the 328 patients, 60% (n = 197) were highly satisfied with the results of surgery, and satisfaction was primarily predicted by having a visual acuity 20/20 or better in at least one eye and not wearing spectacles for distance vision. Before surgery, 57% of patients reported worrying about their eyesight and 47% reported restrictions in activities because of their eyes; these rates dropped to 31% and 9%, respectively, at 6 years. Of the 328 patients, 74% (n = 243) said their preoperative goals were completely met and 94% (n = 308) said they would have radial keratotomy again., Conclusion: The use of 20/40 uncorrected visual acuity and a residual refractive error of +/- 1.00 D were insensitive criteria for evaluating distance spectacle independence. The ability to function without lenses increased substantially only when patients had an uncorrected visual acuity of 20/20 or better in at least one eye, and a refractive error within +/- 0.50 D.

The demographic, life-style, and self-reported health characteristics of a convenience sample of 207 male and 70 female, non-Hispanic White, heavy marijuana users in Los Angeles County were compared with those of more representative county and national samples. Consistent with other researchers' findings, heavy marijuana users were found to differ significantly in living arrangements, job stability, and income. Heavy marijuana users did not differ in completed education, self-reported physical health, or use of alcohol and cigarettes. Heavy marijuana users were less likely to be married than nonusers, but reported the same number of close friends with whom they interacted more frequently than same-aged comparison groups. Our findings suggest that heavy marijuana users are not homogeneous, and that female users differ significantly from male users.

Data from the Rand Health Insurance Experiment (HIE) are used in exploratory analyses to examine the associations of self-reported dental health with general health measures. Responses of 1658 dentulous participants 18-61 yr of age are examined. Patterns of association among and between items of the physical, mental, social, and general health indices and a three-item measure of self-reported dental health are tested using principal component analyses. Findings suggest that dental health represents a separate dimension of health that is not fully accounted for by other health measures. However, while dental health may be considered an independent health construct, the dental health index was weakly but statistically significantly associated with the general health perceptions index and, to a lesser extent, to the mental health index and the two physical health indices. Improved self-reported measures of dental health status, studied in association with other general health measures, will allow us to better define oral health, and patients' perceptions of oral health, particularly in relation to other general health perceptions. In addition, a valid and reliable multidimensional oral health measure would be valuable as a potential cost-effective method of epidemiologic data collection, as well as a tool for evaluating the effectiveness of oral health interventions, and for providing data for dental health policy making and planning.

We studied satisfaction with the results of radial keratotomy one year after surgery on one eye as reported by 354 patients in the Prospective Evaluation of Radial Keratotomy (PERK) Study. We measured satisfaction using an index based on ten questions that were part of a longer psychometric questionnaire. Patients were generally satisfied with the results of radial keratotomy-48% were very satisfied, 42% were moderately satisfied, and 10% were dissatisfied. A lot of trouble with fluctuating vision was reported by 12% of patients before surgery and by 34% one year after surgery; 17% reported a lot of trouble with glare both before surgery and one year after surgery. The three major factors that influenced satisfaction were uncorrected visual acuity, residual refractive error, and subjective daily fluctuation in vision. A multiple regression equation that incorporated these three variables, glare, and patient sex was able to predict only 46% of the variance in patient satisfaction.

The relationship between occupational status and suicide was examined using data from Sacramento County, California. Data were obtained from coroner's records filed routinely on all cases of sudden, violent, or unexpected death since 1925. Occupation- and age-specific suicide rates were calculated for males and age-adjusted for overall comparison for the decades 1945-1954, 1955-1964, and 1965-1974. Findings show an inverse relationship between occupational status and suicide for all age groups over the past 30 years. Over time, male suicide rates have increased particularly for employed males over 65, employed males aged 14 to 24, and males in low-status occupations. General economic insecurity among workers of low socioeconomic status (SES), particularly the elderly, is suggested as a contributing factor to these trends.

To evaluate the possible pulmonary effects of habitual marijuana smoking with and without tobacco, we administered a detailed respiratory and drug use questionnaire and/or lung function tests to young, habitual, heavy smokers of marijuana alone (n = 144) or with tobacco (n = 135) and control subjects of similar age who smoked tobacco alone (n = 70) or were nonsmokers (n = 97). Mean amounts of marijuana and/or tobacco smoked were 49 to 57 joint-years marijuana (average daily number of joints times number of years smoked) and 16 to 22 pack-years of tobacco. Among the smokers of marijuana and/or tobacco, prevalence of chronic cough (18 to 24%), sputum production (20 to 26%), wheeze (25 to 37%) and greater than 1 prolonged acute bronchitic episode during the previous 3 yr (10 to 14%) was significantly higher than in the nonsmokers (p less than 0.05, chi square). No difference in prevalence of chronic cough, sputum production, or wheeze was noted between the marijuana and tobacco smokers, nor were there additive effects of marijuana and tobacco on symptom prevalence. We noted significant worsening effects of marijuana but not to tobacco on specific airway conductance and airway resistance (tests of mainly large airways function) in men and of tobacco but not of marijuana on carbon monoxide diffusing capacity and on closing volume, closing capacity, and the slope of Phase III of the single-breath nitrogen washout curve (tests reflecting mainly small airways function) (p less than 0.03, two-way ANCOVA). No adverse interactive effects of marijuana and tobacco on lung function were found.

Long-term trends in suicides among females were investigated using data from Sacramento County, California. Of the 3,741 cases, 3,398 were Caucasian and 952 (25.4 percent) were females. These analyses focus on 837 Caucasian and Hispanic females. Female suicide rates in Sacramento County have increased gradually since 1925 with a corresponding decline in the male/female sex ratio. The suicide data suggest that a minimum of three types of female suicides can be identified and that the incidence of each type varies with the age of the women. Indicators that help in identifying cases and in tentatively describing an etiology include marital status, employment status and occupation, physical ill health, familial loss or disruption, and psychiatric symptoms.

This study examines the relationship of subjective glare to refraction and visual acuity, respectively, 1 year after surgery in 435 patients who underwent radial keratotomy for nearsightedness in the Prospective Evaluation of Radial Keratotomy (PERK) study. Patients were asked if they experienced glare in bright light. Of the 425 responding, 200 patients responded "no" and 225 patients responded "yes." We found no statistically significant difference in the mean value of the cycloplegic refraction 1 year after surgery in these two patient groups. (Mean cycloplegic refraction: no = -.48, yes = -.52, p = .73). We also found no difference between these groups with respect to the percent of patients with uncorrected visual acuity of 20/40 or better 1 year after surgery (no = 79%, yes = 76%, p = .46).

Results of previous studies of the impact of parents' smoking on children's lung function have been conflicting. To evaluate further the effect of passive smoking on the lung function of children, we analyzed respiratory questionnaire and lung function results obtained during field testing of residents (aggregated according to household) of 4 census tracts in the Los Angeles area. We report here on 971 white, non-Hispanic, nonsmoking, nonasthmatic children residing in households in which the smoking status of both parents was known; households with ex-smoking parents were excluded from analysis. We divided these children into 3 categories related to parental smoking status: (1) at least mother smokes , (2) only father smokes , and (3) neither parent smokes . Prediction equations for several indexes of forced expired volume and flow were derived separately for boys and girls 7 to 17 yr of age. Analysis of variance was used to compare lung function residuals of children in the 3 different passive smoking categories. Analysis was performed separately on younger (7 to 11 yr of age) and older (12 to 17 yr of age) children of each sex. Among younger male children, residual values were significantly lower in the maternal smoking category than in the other 2 household categories for maximal flow and maximal flow after exhalation of 25% of forced vital capacity (FVC) (p less than or equal to 0.05); no differences were noted between the paternal-smoking only and nonsmoking household categories. A trend toward similar results was found in older male children, which approached significance (p less than 0.1). Among females, forced expiratory flow during the middle half of the FVC and maximal flow after exhalation of 75% of FVC were significantly lower in relation to maternal smoking in the older children only (p less than or equal to 0.05). ANOVA revealed no decrement in lung function in relation to passive smoking among children with asthma or bronchitis (n=138).(ABSTRACT TRUNCATED AT 250 WORDS)

Suicide is one of the three leading causes of death among adolescents. More importantly, the rate of suicide is on the increase among both male and female adolescents (Tischler, McKenry, & Morgan, 1981). Data from the United States show that approximately 25,000 persons commit suicide each year (Coleman, 1976), and almost one-fifth of these are in the 15 to 24 year age group (Hendin, 1975). More disturbing is that a large number of adolescent suicides go unreported and that up to 50% of all these unreported suicides are categorized as "accidents" (Toolan, 1964). Utilizing suicide data collected in Sacramento County, California between 1925 and 1979, we analyzed suicides among persons aged 10 to 24 to determine if there are sociodemographic factors or presuicide behaviors which discriminate between male and female suicides, suicides of different ages, or explain the increase in suicide rates, and to compare adolescent suicide rates in Sacramento County with national findings.

A five-year, multicenter, collaborative clinical trial of radial keratotomy for myopia is being carried out at nine clinical centers. The study, funded by the National Eye Institute, is recruiting approximately 500 patients aged 21 years or older with -2.00 to -8.00 diopters of physiologic myopia who also meet other clearly defined eligibility criteria. Surgeons use a diamond-bladed micrometer knife to make eight radial incisions in the anterior cornea. The diameter of the central clear zone is determined by the amount of myopia and the depth of the incisions by intraoperative ultrasonic pachymetry. Investigators other than the surgeon gather all pre- and post-operative data. Examinations include measurement of visual acuity with standardized charts, verification of refractions by a second observer, measurement of corneal curvature by keratometry and photokeratoscopy, quantitation of glare with a glare tester, and measurement of the size of individual endothelial cells from specular photomicrographs with a computerized digitizer. A formal psychometric questionnaire is used to evaluate the patients' subjective response. Physician monitors insure adherence to the protocol during site visits and members of the Data and Safety Monitoring Board oversee the progress of the study. Biostatisticians at the Coordinating Center insure complete data collection, process the data, and assist in the interpretation of results.

We evaluated effects of smoking cessation on lung function and respiratory symptoms of residents 25 to 64 yr of age from 3 communities in the Los Angeles area who completed a detailed respiratory questionnaire and measurements of forced expired volumes and flow rates, closing volume, and closing capacity at 2 times (T1 and T2) 5 yr apart. Results were analyzed in 2,401 participants who fit into 4 smoking categories: never smokers (414 males, 737 females); former smokers (294 males; 172 females); quitters between T1 and T2 (106 males, 62 females); and continuing smokers (278 males, 338 females). Covariance analysis was used to determine differences in lung function across smoking categories at T1 and T2 (adjusted for T1 values) and differences in decline in lung function between T1 and T2. Chi-square analysis was used to compare continuing smokers and quitters with respect to changes in respiratory symptoms. In this population, smoking at T1 was associated with impairment in all indexes of lung function evaluated. Smoking cessation led to significant improvement in symptoms of cough, wheeze, and phlegm production, and to significantly less decline in indexes of small airway function during 5 yr compared with measurements in continuing smokers. However, at T2, lung function still was lower among quitters compared with former and never smokers. Forced expiratory volume in one second (FEV1) was marginally improved in women who quit compared with those who continued to smoke.(ABSTRACT TRUNCATED AT 250 WORDS)

During the past 20 years, suicide rates in the United States have risen consistently. The upward trend has been particularly pronounced for adolescents and males. The availability of a complete data set on all suicides that occurred between 1925 and 1979 in Sacramento County, California, allowed us to compare trends in suicide rates by sex. Our objective is to describe existing differences and similarities between males and females in age-at-death, demographic characteristics, and evidence of presuicide disintegration. We found that female suicide rates in Sacramento County were significantly lower than males and there were significant differences in presuicide characteristics and behaviors between males and females who committed suicide. Except for the youngest age groups, suicide rates for males have remained stable over the last 20 years, while female rates have increased slightly. The fact that this increase coincides with a period of rapid change in the employment and familial roles of women is of particular interest. Male and female suicides differ in important respects, but as female rates rose the characteristics of female suicides increasingly resembled those of male suicides.

The National Eye Institute Prospective Evaluation of Radial Keratotomy (PERK) Study is a multicenter clinical trial for the evaluation of radial keratotomy. This article describes the questionnaire data collected on PERK patients and compares them with a similar group of myopic persons studied during the Rand Health Insurance Experiment (heretofore referred to as the Rand study). The PERK patients are young, white myopes who dislike being dependent on corrective lenses but perceive themselves to be more visually impaired than do comparable Rand study myopes. Most female subjects and a plurality of the male subjects have tried contact lenses and quit wearing them mainly because use of the lenses was inconvenient or bothersome. There is no evidence that patients are psychologically or socially deviant. Both male and female subjects expressed a fear of being without vision and cited impatience with the lenses as their major motivation for wanting surgery.

It has been suggested that young persons who smoke have better lung function initially than those who remain nonsmokers. To examine this possibility prospectively, we analyzed respiratory questionnaire responses and lung function results in residents of Burbank and Lancaster, California, who had completed field screening studies of respiratory status at 2 times 5 yr apart. At Time 1 and Time 2, we calculated the age- and height-adjusted values for forced vital capacity (FVC) and forced expiratory volume in one second (FEV) of all white residents who at Time 1 were 13 to 23 yr of age and did not smoke tobacco. Dividing these into 2 groups, "starters" and "nonsmokers," we used analysis of covariance for males and females with height and age as covariates and compared lung function values at Times 1 and 2 and changes in lung function between these times. Among males at Time 1, FVC, FEV, peak expiratory flow, and maximal flow after exhalation of 25% of FVC were significantly larger for starters than for nonsmokers. At Time 2, values for these same indexes (except for FVC) were no longer significantly different between starters and nonsmokers. Our findings suggest that (1) relatively poor lung function may discourage young males (but not young females) from becoming regular tobacco smokers; (2) prediction equations based on so-called normal populations of nonsmokers might underestimate normal lung function, and (3) the adverse effect of smoking on lung function may be even greater than that estimated from cross-sectional studies.

The present study investigates changes in personal satisfaction over the whole life course by means of life graphs and their determinants. The life graphs were administered within a 4-year interval to 371 individuals (age 45-70). A modified version of the Holmes and Rahe life events scale, administered in the second interview, was used to ascertain the occurrence of four kinds of events: (1) children leaving home, (2) ill health, (3) death of family or friends, and (4) changes in work. Differences in height between the peak of the graph and the height at the current age is the measurement technique used with the life graphs. Events are found to play a different role at different stages of life and seem to be measured against an implicit schedule according to which the events are seen as traumatic or acceptable. Thus, the same event has different effects on perception of emotional state according to age.