Table 2.
Characteristics of Participants at Baseline and at Annual Visits 5 and 8a
| Visit number | |||
|---|---|---|---|
| Characteristic | Baseline (n = 2283), mean (SD) | Visit 5 (n = 1110), mean (SD) | Visit 8 (n = 686), mean (SD) |
| Body mass index (kg/m2) | 28.0 (7.5) | 28.0 (7.1) | 28.2 (6.8) |
| Physical activity scoreb | 7.8 (1.8) | 7.7 (1.8) | 7.8 (1.8) |
| Weight | 74.2 (21.3) | 73.6 (20.0) | 74.1 (19.4) |
| Alcohol, kcal/day | 42.7 (96.1) | 39.8 (97.1) | 40.9 (86.3) |
| Age, years | 45.8 (2.7) | 50.9 (2.7) | 53.5 (2.5) |
| Urinary NTX, nM BCE/mM of creatinine | 34.4 (16.0) | 37.6 (19.4) | 43.5 (19.8) |
| n (percent) | n (percent) | n (percent) | |
| Smoking, current | 370 (16%) | 138 (12%) | 62 (9%) |
| Body mass index | |||
| Underweight < 19 kg/m2 | 82 (4%) | 37 (3%) | 18 (3%) |
| Normal weight 19–24.9 kg/m2 | 929 (41%) | 421 (38%) | 237 (35%) |
| Overweight 25–29.9 kg/m2 | 531 (24%) | 299 (27%) | 194 (28%) |
| Obese ≥ 30 kg/m2 | 714 (32%) | 352 (32%) | 236 (34%) |
| Ethnicity | |||
| African-American | 647 (29%) | 269 (25%) | 159 (24%) |
| Caucasian | 1127 (49%) | 497 (46%) | 328 (49%) |
| Chinese | 243 (11%) | 149 (14%) | 84 (13%) |
| Japanese | 266 (12%) | 174 (16%) | 98 (15%) |
| Menopausal stage | |||
| Premenopausal | 1230 (54%) | 71 (6%) | 18 (3%) |
| Early perimenopausal | 1053 (46%) | 491 (44%) | 184 (27%) |
| Late perimenopausal | 0 | 155 (14%) | 106 (15%) |
| Postmenopausal | 0 | 393 (35%) | 378 (55%) |
| Vitamin D | |||
| Don't take any | 1959 (96%) | 1018 (92%) | 630 (92%) |
| 1–3 days/week | 23 (1%) | 16 (1%) | 14 (2%) |
| 4–6 days/week | 10 (1%) | 15 (1%) | 12 (2%) |
| Every day | 39 (2%) | 56 (5%) | 30 (4%) |
| Calcium supplement use | |||
| Don't take any | 1503 (74%) | 712 (65%) | 469 (68%) |
| 1–3 days/week | 136 (7%) | 98 (9%) | 50 (7%) |
| 4–6 days/week | 94 (5%) | 69 (6%) | 38 (6%) |
| Every day | 297 (15%) | 225 (20%) | 129 (19%) |
a
Information regarding these participant characteristics was obtained annually from baseline to annual follow-up visit 8, except for alcohol intake (assessed at baseline and annual visit 5) and physical activity (assessed at baseline, annual visit 3, and annual visit 6). The values displayed for physical activity and for alcohol intake are those from the most recent prior assessment.
b
Sum of household/caregiving index, activity living index, and sports index, each scored between 1 and 5, summary physical activity score possible range 3 to 15.