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OBJECTIVES: We evaluated the cross-sectional association between race and hysterectomy prevalence in a population-based cohort of US women and investigated participant characteristics associated with racial differences. METHODS: The cohort consisted of 1863 Black and White women in the Coronary Artery Risk Development in Young Adults (CARDIA) study from 2000 to 2002 (years 15 and 16 after baseline). We used logistic regression to examine unadjusted and multivariable adjusted odds ratios. RESULTS: Black women demonstrated greater odds of hysterectomy compared with White women (odds ratio [OR] = 3.52; 95% confidence interval [CI] = 2.52, 4.90). Adjustment for age, educational attainment, perceived barriers to accessing medical care, body mass index, polycystic ovarian syndrome, tubal ligation, depressive symptoms, age at menarche, and geographic location minimally altered the association (OR = 3.70; 95% CI = 2.44, 5.61). In a subset of the study population, those with directly imaged fibroids, the association was minimally attenuated (OR = 3.47; 95% CI = 2.23, 5.40). CONCLUSIONS: In both unadjusted and multivariable adjusted models, Black women, compared with White women, had increased odds of hysterectomy that persisted despite adjustment for participant characteristics. The increased odds are possibly related to decisions to undergo hysterectomy. [ABSTRACT FROM AUTHOR]

Purpose: To determine whether homocyst(e)ine (H(e)) is related to hemostatic factors in a population-based sample without evidence of cardiovascular disease.Methods: A subsample of 660 participants--67 African-American women, 53 African-American men, 201 white women, and 339 white men--was selected from the Atherosclerosis Risk in Communities Study baseline cohort. This was based on carotid intimal-medial wall thickness above the 90th percentile or below the 75th percentile of the population distribution, assessed by B-mode ultrasonography. Unadjusted and multivariable-adjusted associations between fasting plasma H(e) and the hemostatic factors fibrinogen, factor VII:c, factor VIII:c, protein C antigen, hematocrit, platelet count, beta-thromboglobulin (beta-TG), tissue plasminogen activator (tPA), PAI-1, D-dimer, and lipoprotein[a] were examined.Results: Mean age-adjusted H(e) was positively, albeit weakly, correlated with beta-TG, tPA, hematocrit, D-dimer and PAI-1; inversely correlated with protein C; and was higher in smokers, men and African-Americans. In multivariable regression, beta-TG, tPA, and factor VII:c were positively associated with H(e), as well as age, black race, male sex, and current cigarette smoking.Conclusions: These cross-sectional data for a biracial group of middle-aged individuals suggest that H(e) levels falling below values consistent with homocyst(e)inemia are associated with several prothrombotic factors after adjustment for sociodemographic factors. If H(e) change is antecedent to altered hemostasis, FDA-mandated fortification of grain products with folic acid for prevention of fetal neural tube defects may lead to both reduced plasma H(e) levels and improved hemostatic profiles. [ABSTRACT FROM AUTHOR]

Objective: To test the association of fitness changes over 7 and 20 years on the development of diabetes in middle age.Research Design and Methods: Fitness was determined based on the duration of a maximal graded exercise treadmill test (Balke protocol) at up to three examinations over 20 years from 3,989 black and white men and women from the Coronary Artery Risk Development in Young Adults study. Relative fitness change (percent) was calculated as the difference between baseline and follow-up treadmill duration/baseline treadmill duration. Diabetes was identified as fasting glucose >or=126 mg/dl, postload glucose >or=200 mg/dl, or use of diabetes medications.Results: Diabetes developed at a rate of 4 per 1,000 person-years in women (n = 149) and men (n = 122), and lower baseline fitness was associated with a higher incidence of diabetes in all race-sex groups (hazard ratios [HRs] from 1.8 to 2.3). On average, fitness declined 7.6% in women and 9.2% in men over 7 years. The likelihood of developing diabetes increased per SD decrease (19%) from the 7-year population mean change (-8.3%) in women (HR 1.22 [95% CI 1.09-1.39]) and men (1.45 [1.20-1.75]) after adjustment for age, race, smoking, family history of diabetes, baseline fitness, BMI, and fasting glucose. Participants who developed diabetes over 20 years experienced significantly larger declines in relative fitness over 20 years versus those who did not.Conclusions: Low fitness is significantly associated with diabetes incidence and explained in large part by the relationship between fitness and BMI. [ABSTRACT FROM AUTHOR]

Objective: There has been reduced active smoking, decreased societal acceptance for smoking indoors, and changing smoking policy since the mid-1980s. We quantified passive smoke exposure trends and their relationship with workplace policy.Method: We studied 2504 CARDIA participants (Blacks and Whites, 18-30 years old when recruited in 1985-86 from four US cities, reexamination 2, 5, 7, 10, and 15 years later) who never reported current smoking and attended examinations at 10 or 15 years. RESULTS.: In non-smokers with a college degree (n=1581), total passive smoke exposure declined from 16.3 h/week in 1985/86 to 2.3 h/week in 2000/01. Less education tended to be associated with more exposure at all timepoints, for example, in high school or less (n=292) 22.2 h/week in 1985/86 to 8.5 h/week in 2000/01. Those who experienced an increase in the restrictiveness of self-reported workplace smoking policy from 1995/96 to 2000/01 were exposed to almost 3 h per week less passive smoke than those whose workplace policies became less restrictive in this time period.Conclusions: The increasing presence of restrictive workplace policies seemed to be a component of the substantial decline in self-reported passive smoke exposure since 1985. [ABSTRACT FROM AUTHOR]

Purpose: To study adiponectin, a circulating adipocytokine secreted by adipocytes inversely associated with diabetes and insulin resistance, and factors affecting its levels in the Coronary Artery Risk Development in Young Adults (CARDIA) study.Methods: Adiponectin in serum was measured by radioimmunoassay in 3355 participants (ages: 23-45 years) categorized by fasting glucose levels as normal, impaired fasting glucose, or diabetes mellitus.Results: Levels of adiponectin were higher in women, in white participants, and with age. Waist circumference, estimating visceral fat, strongly and inversely correlated with levels of adiponectin, more than body mass index. Adiponectin values adjusted for gender and race were lower with higher fasting glucose values in the normal range and still lower with impaired fasting glucose and untreated diabetes mellitus, even further adjusting for waist circumference and fasting insulin levels (p < 0.0001). Gender- and race-adjusted adiponectin levels were inversely associated with insulin resistance at year 15 and with insulin resistance measured 15 years previously and with its change from baseline to year 15 (p < 0.0001).Conclusions: These data suggest complex and significant physiologic interactions among circulating levels of adiponectin and measures of insulin action throughout young adulthood, even from several years earlier. Central obesity, as measured with waist circumference, is a primary factor affecting levels of circulating adiponectin. Furthermore, levels of glucose and levels of adiponectin may directly influence one another. [ABSTRACT FROM AUTHOR]

Background: Small body size predicts hip fractures in older women.Objective: To test the hypothesis that small body size predicts the risk for other clinical fractures.Design: Prospective cohort study.Setting: Population-based listings in four areas of the United States.Patients: 8059 ambulatory nonblack women 65 years of age or older.Measurements: Weight, weight change since 25 years of age, body mass index, lean body mass and percent body fat, and nonspine fractures during 6.4 years of follow-up.Results: Compared with women in the highest quartile of weight, women in the lowest quartile had relative risks of 2.0 (95% CI, 1.5 to 2.8) for hip fractures, 2.3 (CI, 1.1 to 4.7) for pelvis fractures, and 2.4 (CI, 1.5 to 3.9) for rib fractures. Adjustment for total-hip bone mineral density eliminated the elevated risk. Results were similar for other body size measures. Smaller body size was not a risk factor for humerus, elbow, wrist ankle, or foot fractures.Conclusions: Total body weight is useful in the prediction of hip, pelvis, and rib fractures when bone mineral density has not been measured. [ABSTRACT FROM AUTHOR]

Objective: The prevalence of type 2 diabetes among Hispanic and Asian Americans is increasing. These groups are largely comprised of immigrants who may be undergoing behavioral and lifestyle changes associated with development of diabetes. We studied the association between acculturation and diabetes in a population sample of 708 Mexican-origin Hispanics, 547 non-Mexican-origin Hispanics, and 737 Chinese participants in the Multi-Ethnic Study of Atherosclerosis (MESA).Research Design and Methods: Diabetes was defined as fasting glucose >/=126 mg/dl and/or use of antidiabetic medications. An acculturation score was calculated for all participants using nativity, years living in the U.S., and language spoken at home. The score ranged from 0 to 5 (0 = least acculturated and 5 = most acculturated). Relative risk regression was used to estimate the association between acculturation and diabetes.Results: For non-Mexican-origin Hispanics, the prevalence of diabetes was positively associated with acculturation score, after adjustment for sociodemographics. The prevalence of diabetes was significantly higher among the most acculturated versus the least acculturated non-Mexican-origin Hispanics (prevalence ratio 2.49 [95% CI 1.14-5.44]); the higher the acculturation score is, the higher the prevalence of diabetes (P for trend 0.059). This relationship between acculturation and diabetes was partly attenuated after adjustment for BMI or diet. Diabetes prevalence was not related to acculturation among Chinese or Mexican-origin Hispanics.Conclusions: Among non-Mexican-origin Hispanics in MESA, greater acculturation is associated with higher diabetes prevalence. The relation is at least partly mediated by BMI and diet. Acculturation is a factor that should be considered when predictors of diabetes in racial/ethnic groups are examined. [ABSTRACT FROM AUTHOR]

OBJECTIVE: It is controversial whether the clustering of certain metabolic abnormalities should be separately designated as the metabolic syndrome. We operationalized the 'syndrome' concept and tested whether the metabolic syndrome was compatible with these operational constructs. RESEARCH DESIGN AND METHODS: The baseline cross-section of the Multi-Ethnic Study of Atherosclerosis recruited a population-based cohort of 6,781 individuals, aged 45-84 years, from six communities in the U.S. Metabolic syndrome components (waist circumference, blood pressure, fasting serum HDL cholesterol, triglycerides, and plasma glucose), homeostasis model assessment (HOMA) of insulin resistance (fasting glucose x insulin), and intimal-medial thickness (IMT) in the common and internal carotid arteries by B-mode ultrasound were measured. RESULTS: Higher syndrome component count is associated with higher HOMA levels (trend P < 0.001). Given the prevalence of individual components, the nonprevalence of any component or the co-prevalence of four or five components is greater than expected (chi2 P < 0.001). After accounting for the additive association of each component, the current definition of metabolic syndrome (co-prevalence of three or more components) does not have supra-additive association with thicker IMT in the common carotid (men: P = 0.075, women: P = 0.949) or internal carotid artery (men: P = 0.106, women: P = 0.121). CONCLUSIONS: The metabolic syndrome did not have supra-additive association with IMT, but its components clustered greater than chance expectation and a higher component count was associated with greater insulin resistance. The metabolic syndrome was compatible with two of three 'syndrome' constructs tested. [ABSTRACT FROM AUTHOR]

Objective: To determine whether older women with diabetes have an increased risk of falls and whether known risk factors for falls account for any increased risk.Research Design and Methods: This prospective cohort study included 9,249 women > or =67 years of age enrolled in the Study of Osteoporotic Fractures. Diabetes was determined by questionnaire at baseline. Physical performance was measured at the second examination. Subsequently, falls were ascertained every 4 months by postcard.Results: A total of 629 (6.8%) women had diabetes, including 99 who used insulin. During an average of 7.2 years, 1,640 women (18%) fell more than once a year. Diabetes, stratified by insulin use, was associated with an increased risk of falling more than once a year (age-adjusted odds ratio [OR] 1.68 [95% CI 1.37-2.07] for non-insulin-treated diabetes; age-adjusted OR 2.78 [1.82-4.24] for insulin-treated diabetes). In the first 2 years of follow-up, women with diabetes were not more likely to fall than women without diabetes (44 vs. 42%; P = 0.26), but they had more falls (3.1 vs. 2.4; P < 0.01). Women with diabetes were more likely to have other risk factors for falls, which appeared to account for the increased risk of falls associated with non-insulin-treated diabetes (adjusted OR 1.18 [0.87-1.60]) but not insulin-treated diabetes (adjusted OR 2.76 [1.52-5.01]).Conclusions: Older women with diabetes have an increased risk of falling, partly because of the increased rates of known fall risk factors, and may benefit from interventions to prevent falls. Further research is needed to determine whether diabetes treatment reduces fall risk. [ABSTRACT FROM AUTHOR]