Table 1. Selected Anthropometric and Densitometric Measures of 183 Men <50 Years, 409 Men ≥50 Years, 1,832 Premenopausal Women, and 3,468 Postmenopausal Women.
| Variable | Men | Women | ||
|---|---|---|---|---|
| <50 Years | ≥50 Years | Premenopausal | Postmenopausal | |
| Age, yr | 41.7±0.65 | 64.5±0.47 | 44.1±0.21 | 60.3±0.15a |
| BMI, kg/m2 | 25.9±0.41 | 26.5±0.26 | 28.6±0.13 | 29.0±0.09a |
| BMD, g/cm2 | ||||
| L1–L4 | 1.06±0.02 | 1.03±0.01 | 1.03±0.006 | 1.03±0.004 |
| Femoral neck | 0.824±0.013 | 0.838±0.008 | 0.818±0.004 | 0.796±0.002a |
| Total hip | 0.886±0.013 | 0.909±0.008 | 0.875±0.004 | 0.854±0.002a |
| T-score | ||||
| L1–L4 | –0.733±0.121 | –0.873±0.076 | –0.819±0.034 | –0.840±0.022 |
| Femur neck | –2.138±01.45 | –2.102±0.066 | –1.451±0.030 | –1.642±0.020a |
| Total hip | –1.887±0.114 | –1.828±0.071 | –0.673±0.029 | –0.843±0.020a |
| Z-score | ||||
| L1–L4 | –0.350±0.111 | - | –0.42±0.032 | - |
| Femur neck | –0.487±0.104 | –0.478±0.068 | –0.06±0.029 | –0.31±0.019a |
| Total hip | –0.706±0.113 | –0.665±0.074 | 0.12±0.028 | –0.10±0.019a |
| Fat mass, g | ||||
| L1–L4 | 1.626±0.049 | 1.592±0.030 | 1.55±0.014 | 1.58±0.009 |
| Femoral neck | 31.274±0.837 | 29.518±0.527 | 35.473±0.241 | 35.363±0.160a |
| Total hip | 253.473±7.094 | 247.471±4.463 | 299.505±2.113 | 300.222±1.403a |
| L1–L4 | ||||
| Normal | - | 192 (49.1) | - | 1,732 (49.9) |
| Osteopenia | - | 169 (43.2) | - | 1,498 (43.2) |
| Osteoporosis | - | 30 (7.7) | - | 238 (6.9) |
| Femoral neck | ||||
| Normal | - | 44 (11.3) | - | 737 (21.3)a |
| Osteopenia | - | 164 (41.9) | - | 1,748 (50.4)a |
| Osteoporosis | - | 183 (46.8) | - | 984 (28.4)a |
| Total hip | ||||
| Normal | - | 75 (19.2) | - | 1,684 (48.7)a |
| Osteopenia | - | 186 (46.0) | - | 1,493 (43.2)a |
| Osteoporosis | - | 136 (34.8) | - | 282 (8.2)a |
| Z-score <–2.0 | ||||
| L1–L4 | 12 (6.6) | - | 89 (5.5) | - |
| Femoral neck | 20 (10.0) | - | 45 (2.5) | - |
| Total hip | 39 (19.5) | - | 17 (0.9) | - |
| BMI, kg/m2 | ||||
| <18.5 | 8 (4.0) | 7 (1.8) | 14 (0.8) | 23 (0.7)a |
| 18.5–24.9 | 75 (37.3) | 142 (36.4) | 429 (23.5) | 625 (18.0)a |
| 25–29.9 | 82 (40.8) | 160 (41.0) | 752 (41.2) | 1,371 (39.6) |
| 30–39.9 | 36 (17.9) | 81 (20.8) | 610 (33.4) | 1,394 (40.2)a |
| ≥40 | 0 | 0 | 22 (1.2) | 53 (1.5)a |
Values are expressed as mean±SE or number (%). Age-adjusted means were calculated using general linear models. Z-scores (Z-score ≤–2.0) were used to diagnose low bone mass for premenopausal women and men <50 years and T-scores were used for postmenopausal women and men ≥50 years which were categorized as: normal if T-score ≥–1.0; osteopenia if –2.5<T-score<–1.0; osteoporosis if T-score ≤–2.5.
BMI, body mass index; BMD, bone mineral density.
aP<0.001.