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Associations of total testosterone (T) and calculated free T with cardiovascular disease (CVD) remain poorly understood. Particularly how these associations vary according to race and ethnicity in a nationally representative sample of men. Data included 7058 men (≥20 years) from NHANES. CVD was defined as any reported diagnosis of heart failure (HF), coronary artery disease (CAD), myocardial infarction (MI), and stroke. Total T (ng/mL) was obtained among males who participated in the morning examination. Weighted multivariable-adjusted logistic regression models were conducted. We found associations of low T (OR = 1.57, 95% CI = 1.17-2.11), low calculated free T (OR = 1.53, 95% CI = 1.10-2.17), total T (Q1 vs Q5), and calculated free T (Q1 vs Q5) with CVD after adjusting for estradiol and SHBG. In disease specific analysis, low T increased prevalence of MI (OR = 1.72, 95% CI = 1.08-2.75) and HF (OR = 1.74, 95% CI = 1.08-2.82), but a continuous increment of total T reduced the prevalence of CAD. Similar inverse associations were identified among White and Mexican Americans, but not Blacks (OR = 0.93, 95% CI = 0.49-1.76). Low levels of T and calculated free T were associated with an increased prevalence of overall CVD and among White and Mexican Americans. Associations remained in the same direction with specific CVD outcomes in the overall population.

Background: The association between testosterone concentrations and sleep duration is poorly understood. Objective: To evaluate the association between sleep duration and quality with serum testosterone concentrations and its variation by sex and age. Methods: Data were analyzed for 8748 men and women (≥20 years old) who participated in the cycles of the National Health and Nutrition Examination Survey 2011–2016, a cross‐sectional study. Total testosterone (ng/dL) was measured and categorized (low, moderate, and high) based on established cut‐offs for men and its tertile distribution among women. Sleep duration was classified as ≤6, 7–8, and ≥9 h. Sleep quality was classified as poor or good based on the frequency of trouble falling or staying asleep or sleeping too much. Weighted multivariable adjusted and multinomial logistic regression models were conducted to assess these associations. Results: The association between sleep duration and testosterone concentrations, varied according to sex and age. Sleep deprivation (≤6 h) was associated with high testosterone (odds ratio = 3.62; 95% confidence interval: 1.37, 9.53) among young men (20–40 years old); meanwhile, middle‐aged men (41–64 years old) who reported more sleep duration had low testosterone (odds ratio = 2.03; 95% confidence interval: 1.10, 3.73). A J‐shaped association between sleep duration and low testosterone (odds ratio≤6 h = 1.57; 95% confidence interval: 1.10, 2.27; odds ratio≥9 h = 2.06; 95% confidence interval: 1.18, 3.59) was observed in women aged 41–64 years. We did not find any association with sleep quality. Conclusion: The association of sleep duration with serum testosterone concentrations varies with sex and age group. Prospective studies are warranted to confirm these sex and age group differences. [ABSTRACT FROM AUTHOR]