Table 1.
Selected demographic and biologic characteristics of adult men in the NHANES survey, 1999-2004.
| All N = 898 |
Age at interview
|
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|---|---|---|---|---|---|---|---|---|
| 20-44 n = 409 |
45-69 n = 336 |
70 + n = 153 |
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|
| ||||||||
| Median (IQR) | Median (IQR) | Median (IQR) | Median (IQR) | |||||
| Age (years) | 41.8 (30.9-54.3) | 31.8 (25.1-37.1) | 53.3 (48.4-59.3) | 75.2 (71.6-80.5) | ||||
| Race/ethnicity | n | % | n | % | n | % | n | % |
| Non-Hispanic White | 470 | 71.6 | 178 | 65.6 | 186 | 77.2 | 106 | 86.3 |
| Non-Hispanic Black | 161 | 10.4 | 87 | 12.3 | 56 | 8.4 | 18 | 7.1 |
| Mexican American | 200 | 8.1 | 107 | 11.0 | 68 | 4.9 | 25 | 3.1 |
| Other | 67 | 9.9 | 37 | 11.2 | 26 | 9.4 | 4 | 3.6 |
| Cigarette smoking | ||||||||
| Never | 385 | 44.5 | 223 | 54.0 | 112 | 33.5 | 50 | 31.9 |
| Former | 275 | 26.9 | 57 | 15.4 | 127 | 36.8 | 91 | 59.3 |
| Current | 238 | 28.5 | 129 | 30.5 | 97 | 29.7 | 12 | 8.8 |
| Number of alcohol drinks (per week) | ||||||||
| 0 | 262 | 27.7 | 82 | 21.1 | 114 | 34.3 | 66.0 | 40.7 |
| less than 1 | 199 | 22.6 | 94 | 23.5 | 68 | 20.1 | 37.0 | 28.8 |
| 1 to less than 7 | 230 | 28.8 | 137 | 37.0 | 71 | 20.6 | 22.0 | 13.8 |
| 7 + | 171 | 20.8 | 72 | 18.4 | 75 | 25.0 | 24.0 | 16.8 |
| Physical activity (MET-hours per week of moderate to vigorous activity) | ||||||||
| Inactive | 363 | 33.8 | 155 | 33.2 | 122 | 31.4 | 86 | 49.4 |
| < 3 Met-hours/week | 306 | 36.3 | 134 | 35.0 | 126 | 38.8 | 46 | 33.4 |
| 3 + Met-hours/week | 229 | 29.9 | 120 | 31.8 | 88 | 29.9 | 21 | 17.2 |
| Body size measurements | Mean | (SE) | Mean | (SE) | Mean | (SE) | Mean | (SE) |
| From DXA scan | ||||||||
| Total bone area (cm2) | 2278.6 | (9.4) | 2283.2 | (11.8) | 2289.5 | (13.6) | 2192.6 | (17.1) |
| Total bone mineral content (BMC) (g) | 2717.8 | (21.5) | 2756.4 | (27.3) | 2706.7 | (29.6) | 2500.5 | (37.8) |
| Total bone mineral density (g/cm2) | 1.2 | (0.0) | 1.2 | (0.0) | 1.2 | (0.0) | 1.1 | (0.0) |
| Fat mass (g) | 25384.6 | (433.2) | 23843.4 | (615.8) | 27545.2 | (644.2) | 25566.0 | (650.5) |
| Lean mass excluding BMC (g) | 59869.5 | (472.5) | 60223.6 | (614.6) | 60743.4 | (645.2) | 53070.7 | (617.1) |
| Lean mass including BMC (g) | 62587.2 | (489.2) | 62980.0 | (635.7) | 63450.1 | (663.8) | 55571.2 | (643.7) |
| Total mass (lean+fat) (g) | 87971.8 | (869.5) | 86823.4 | (1158.3) | 90995.3 | (1251.2) | 81137.2 | (1098.5) |
| Total percent body fat (%) | 28.0 | (0.2) | 26.4 | (0.4) | 29.5 | (0.3) | 31.0 | (0.5) |
| From physical measurement | ||||||||
| Height (cm) | 176.6 | (0.3) | 176.9 | (0.4) | 176.9 | (0.5) | 172.9 | (0.7) |
| Body mass index (BMI) (kg/m2) | 27.9 | (0.3) | 27.4 | (0.3) | 28.8 | (0.4) | 27.0 | (0.4) |
| Waist circumference (cm) | 99.6 | (0.6) | 96.0 | (0.9) | 104.1 | (0.9) | 102.5 | (1.0) |
| Sex steroid hormone and SHBG concentrations | ||||||||
| Testosterone (ng/mL) | 5.1 | (0.1) | 5.6 | (0.1) | 4.6 | (0.1) | 4.1 | (0.1) |
| Free testosterone (pg/mL) | 105.9 | (2.2) | 126.9 | (2.4) | 86.3 | (2.7) | 55.8 | (1.7) |
| SHBG (nmol/L) | 37.1 | (0.9) | 30.4 | (1.1) | 41.5 | (1.5) | 62.6 | (2.8) |
| 3-alpha-diol-G (ng/mL) | 8.3 | (0.3) | 8.4 | (0.2) | 8.3 | (0.5) | 7.1 | (0.5) |
| Estradiol (pg/mL) | 33.7 | (1.0) | 35.1 | (1.3) | 32.9 | (1.2) | 27.9 | (1.7) |
| Free estradiol (fg/mL) | 896.9 | (31.1) | 971.5 | (39.3) | 845.4 | (39.1) | 629.0 | (48.7) |
IQR = Interquartile range
DXA = Dual X-ray absorptiometry
Percents, means and standard errors have been weighted for NHANES sampling and represent characteristics in the U.S. general population.