Table 1.
Selected characteristics of the analytic sample (n = 624)
| T1 (1987–1989) | T2 (1995–1997) | T3 (2002–2004) | |
|---|---|---|---|
| Demographic and health characteristics, n (%)a | |||
| Age (yr) | |||
| 40–49 | 267 (42.8%) | 22 (3.5%) | 0 (0.0%) |
| 50–59 | 228 (36.5%) | 268 (42.9%) | 133 (21.3%) |
| 60–69 | 128 (20.5%) | 225 (36.1%) | 233 (37.3%) |
| 70–79 | 1 (0.2%) | 109 (17.5%) | 210 (33.7%) |
| 80–86 | 0 (0.0%) | 0 (0.0%) | 48 (7.7%) |
| Race | |||
| White | 612 (98.2%) | 596 (96.1%) | 604 (97.3%) |
| Black | 5 (0.8%) | 8 (1.3%) | 4 (0.6%) |
| Other | 6 (1.0%) | 16 (2.6%) | 13 (2.1%) |
| Marital status | |||
| Never married | 57 (9.1%) | 45 (7.2%) | 54 (8.7%) |
| Currently married | 480 (76.9%) | 487 (78.2%) | 461 (73.9%) |
| Divorced | 77 (12.3%) | 68 (10.9%) | 67 (10.7%) |
| Widowed | 10 (1.6%) | 23 (3.7%) | 42 (6.7%) |
| Employed | 555 (88.9%) | 441 (70.8%) | 341 (54.6%) |
| Education | |||
| Less than high school | 41 (6.6%) | 33 (5.3%) | 35 (5.6%) |
| At least some college | 78 (12.5%) | 77 (12.5%) | 99 (15.9%) |
| College or postgraduate study | 505 (80.9%) | 508 (82.2%) | 490 (78.5%) |
| Annual household income | |||
| Less than $40,000 | 163 (26.6%) | 143 (23.8%) | 135 (22.5%) |
| $40,000–79,000 | 281 (45.9%) | 203 (33.8%) | 203 (33.8%) |
| $80,000 or more | 168 (27.5%) | 254 (42.3%) | 262 (43.7%) |
| Health status | |||
| Diabetes mellitus | 18 (2.9%) | 36 (5.8%) | 62 (9.9%) |
| Hypertension | 139 (22.3%) | 215 (34.5%) | 303 (48.6%) |
| Heart disease | 42 (6.7%) | 84 (13.5%) | 142 (22.8%) |
| Current smoking | 114 (18.3%) | 58 (9.3%) | 43 (6.9%) |
| Hormone concentrations, mean ± sd | |||
| TT, ng/dl | 526.1 ± 169.5 | 454.8 ± 156.0 | 418.6 ± 164.8 |
| FT, ng/dl | 13.6 ± 5.2 | 10.6 ± 3.7 | 7.2 ± 2.8 |
| SHBG, nm | 31.8 ± 16.3 | 34.4 ± 16.4 | 51.3 ± 20.0 |
| LH, IU/liter | 4.7 ± 2.8 | 5.7 ± 4.5 | 4.6 ± 4.4 |
| Frailty (T3 only), n (%)a | |||
| Degree of frailty | |||
| None | 251 (43.1%) | ||
| Intermediate | 286 (49.1%) | ||
| Frail | 46 (7.9%) | ||
| Frailty component | |||
| Weight loss | 53 (8.6%) | ||
| Exhaustion | 77 (12.4%) | ||
| Low physical activity | 105 (17.6%) | ||
| Slowness | 135 (21.9%) | ||
| Weakness | 134 (22.9%) |
a
Some subjects missing selected data; proportions calculated w/respect to nonmissing records.