Table 1.
Distribution of demographic and anthropometric factors among the participants of the five studies.
| Characteristics | BOA | WOA | HAS | ROAD | OAI White | OAI Black |
|---|---|---|---|---|---|---|
| (N = 252) | (N = 221) | (N = 122) | (N = 297) | (N = 1,735) | (N = 394) | |
| Age (years)a | 68 (6) | 57 (8) | 70 (8) | 71 (9) | 61 (9) | 62 (9) |
| Sex (male, %) | 29 | 45 | 42 | 29 | 45 | 30 |
| Height (cm)a | 158 (8) | 160 (9) | 156 (9) | 153 (9) | 169 (93) | 168 (86) |
| Weight (kg)a | 66 (12) | 58 (10) | 61 (10) | 56 (10) | 81 (16) | 86 (15) |
| BMI (kg/m2)a | 26 (4) | 23 (3) | 25 (3) | 24 (3) | 28 (5) | 31 (5) |
aMean (SD).
Abbreviations: BOA, Beijing Osteoarthritis Study, China; WOA, Wuchuan Osteoarthritis Study, China; ROAD, Research on Osteoarthritis/osteoporosis Against Disability Study, Japan; HAS, Hallym Aging Study, South Korea; OAI, Osteoarthritis Initiative, United States; BMI, body mass index.