Correlates of low testosterone and symptomatic androgen deficiency in a population-based sample.

Abstract

Risk factors for low testosterone and symptomatic androgen deficiency (AD) may be modifiable. Our objective was to examine demographic, anthropometric, and medical correlates of low testosterone and symptomatic AD. Data were used from the Boston Area Community Health Survey, an epidemiological study conducted from 2002-2005. Data were obtained from a community-based random sample of racially and ethnically diverse men. Data were available for 1822 men. Multivariate logistic regression was used to estimate odds ratios (OR) and 95% confidence intervals (CI) for associations of covariates with 1) low testosterone and 2) symptomatic AD. The operational definition of low testosterone was serum total testosterone less than 300 ng/dl and free testosterone less than 5 ng/dl; symptomatic AD was defined as the additional presence of symptoms: any of low libido, erectile dysfunction, or osteoporosis or two or more of sleep disturbance, depressed mood, lethargy, or diminished physical performance. Factors associated with low testosterone included age (OR = 1.36; 95% CI= 1.11-1.66, per decade), low per-capita income ($6000 or less per household member vs. more than $30,000; OR = 2.86; 95% CI = 1.39-5.87), and waist circumference (per 10-cm increase; OR = 1.75; 95% CI = 1.45-2.12). Only age (OR = 1.36; 95% CI = 1.04-1.77), waist circumference (OR = 1.88; 95% CI = 1.44-2.47), and health status (OR = 0.21; 95% CI = 0.05-0.92, excellent vs. fair/poor) were associated with our construct of symptomatic AD. Of all variables, waist circumference was the most important contributor in both models. Waist circumference is a potentially modifiable risk factor for low testosterone and symptomatic AD. Manifestation of symptoms may be a consequence of generally poor health status.