Search

Background: Binge drinking is prevalent among male populations. Few studies have investigated masculine role discrepancy (i.e., the perception of being less masculine than the typical 'man')/discrepancy stress (i.e., the strain caused by perceived masculine role discrepancy) and binge drinking among men. This study aims to investigate the prevalence of binge drinking among Chinese men and the associations between masculine role discrepancy and binge drinking via discrepancy stress.Methods: A random and population-based telephone survey was conducted among Chinese male adults (n = 2000) in Hong Kong. Their levels of masculine role discrepancy and discrepancy stress and presence of binge drinking were tested.Results: We found that 12.3% of the participants had binge drinking behaviors during the last three months prior to the survey. Age and marital status were significantly associated with binge drinking behaviors. Discrepancy stress was positively associated with binge drinking, and it positively mediated the relationship between masculine role discrepancy and binge drinking. However, we found a negative direct association between masculine role discrepancy and binge drinking in the mediation model.Conclusion: The study may shed light on a relatively new and important research direction that links up gender roles and substance use problems. It contributes to an understanding of the potential health impact of gender-role related issues as well as determinants of drinking problems. [ABSTRACT FROM AUTHOR]

Introduction: Masculine role discrepancy and discrepancy stress occur when men perceive that they fail to live up to the ideal manhood derived from societal prescriptions. The present study examined the associations between masculine role discrepancy and two emotional and mental health problems (social anxiety and depressive symptoms), and potential mediation effects through discrepancy stress and self-esteem in a male general population.Methods: Based on random population-based sampling, 2000 male residents in Hong Kong were interviewed. Levels of masculine role discrepancy, discrepancy stress, self-esteem, social anxiety, and depressive symptoms were assessed by using validated scales.Results: Results of structural equation modeling analysis indicated that the proposed model fit the sample well. (χ2(118) = 832.34, p < .05, CFI = 0.94, NNFI = 0.91, RMSEA = 0.06). Those who were young, single and less educated were vulnerable to masculine role discrepancy, discrepancy stress, and emotional/mental health problems. We found that discrepancy stress significantly mediated the association between masculine role discrepancy and social anxiety, while self-esteem significantly mediated the associations between masculine role discrepancy and both social anxiety and depression.Limitations: Study limitations mainly included the cross-sectional design and reliance on self-reported questionnaires.Conclusions: The associations between masculine discrepancy and social anxiety/depressive symptoms among men may be explained by the increase in discrepancy stress and decrease in self-esteem. The findings suggest needs and directions for future research for the relationship between masculine role discrepancy and men's mental health, mechanisms involved, and interventions for improvement. [ABSTRACT FROM AUTHOR]

Background: This study investigated the incidence of remission from probable depression among adolescents in Hong Kong. Remissions were defined as having Center for Epidemiological Studies Depression Scale (CESD) scores changed from ≥16 at baseline to <16 over the 12-month follow-up period. The study tested the predictors of remissions, including perceived changes in family support, self-efficacy, self-esteem, positive affect, negative events, social anxiety, and loneliness.Methods: The study surveyed 9666 secondary school students and identified 5487 (57%) students with probable depression in Hong Kong. A questionnaire assessing the levels of the aforementioned variables was completed at baseline and at the 12-month follow-up.Results: Among participants with probable depression at baseline, 23.2% remitted from depression at follow-up. Remissions were more common among males than females. Univariate logistic regression showed that perceived changes in all the aforementioned variables significantly predicted remission for both males and females. The same is true for most of these variables when they were entered together into multiple logistic regression models (with and without controlling for baseline CESD scores), except for family support in the female model and self-efficacy in both male and female models.Limitations: Limitations include potential self-report bias and only one follow-up observation over time. The design treats cases of probable mild to severe depression as a single group (CESD≥16).Conclusions: The findings are potentially useful for designing and guiding related intervention programs. Results highlight the importance of long-term follow-up of those screened as probable depression to understand the course of changes in levels of depression. [ABSTRACT FROM AUTHOR]

Formaldehyde (HCHO) is an abundant carbonyls and plays important roles in ozone formation and atmospheric oxidizing capacity. To better understand the formation mechanisms of HCHO and its effects on ozone formation, carbonyl compounds were measured at a regional background site of Hong Kong from 20 August to 22 December 2012. Among the total observed carbonyls, Formaldehyde (HCHO, 2.00 ± 1.04 ppbv) presents the most abundant concentration and plays the most important role in OH removal with L OH value of 0.47 s−1. To further dissect the secondary formation mechanism of HCHO at Hok Tsui, detailed modeling analyses were conducted by the OBM-AOCP model for two cases with different meteorological conditions. The result shows that HCHO production was dominated by the reactions of CH 3 O + O 2 , and RO + O 2 (first-generation precursor of RO was Alkenes). The HCHO destruction pathways during two cases were governed by the reactions with OH and photolysis. The net generation rate of HCHO was controlled by meteorological conditions with alkenes (mainly ethylene (C 2 H 4) and propylene (C 3 H 6)) being the dominant parent hydrocarbons of HCHO. Overall, this study provides some new insights into the formation mechanisms of HCHO, especially their parent hydrocarbon species, underlines the important role of carbonyls in ozone pollution in Hok Tsui. Reducing the emissions of alkenes would be an effective way to mitigate photochemical pollution in the background atmosphere of China. • Formaldehyde is the most abundant and important reactive carbonyls at Hok Tsui. • The MCM model explicitly simulated the HCHO formation and identifying precursors at the species level. • Alkenes (mainly ethene and propene) are the principal precursors of HCHO. [ABSTRACT FROM AUTHOR]

Atmospheric oxidizing capacity (AOC), dominated by the hydroxyl radical (OH), is an important index of the self-cleaning capacity of atmosphere and plays a vital role in the tropospheric chemistry. To better understand the key processes governing the chemistry of rural atmosphere of southern China, we analyzed the oxidation capacity and radical chemistry at a regional background site in Hong Kong from 23 August to 22 December 2012, which covered the summer, autumn and winter seasons. A chemical box model built on the latest Master Chemical Mechanism (v3.3) was used to elucidate the OH reactivity and sources of RO X radicals (RO X = OH + HO 2 + RO 2 ). The AOC showed a clear seasonal pattern with stronger intensity in late summer compared to autumn and winter. Reactions with NO 2 (30%) and oxygenated volatile organic compounds (OVOCs) (31%) together dominated the OH loss in summer, while reactions with CO (38% in autumn and 39% in winter) and OVOCs (34% in autumn and 25% in winter) made larger contributions in autumn and winter. Photolysis of O 3 (36%–47%) presented the major RO X source during all three seasons. The second largest ROx source was HONO photolysis (25%) in summer compared to HCHO photolysis in autumn (20%) and winter (21%). Besides, photolysis of other OVOCs was another important primary source of ROx radicals with average contributions of 14%, 13% and 20% for the summer, autumn and winter cases, respectively. Overall, the present study evaluates the oxidizing capacity of the rural atmosphere of South China and elucidates the varying characteristics of photochemical processes in different air masses. [ABSTRACT FROM AUTHOR]