Table 2.
Demographic characteristics of participants from the included individual studies
| Study and sample size | Hong Kong 1993 (n=410) | WHO 1998 (n=974) | WHO 2002 (n=2695) | Nigeria 2010 (n=2794) | Total pooled data (n=6873) |
|---|---|---|---|---|---|
| 1. Mean age (SD) | 26.6 (6.1) | 27.3 (7.0) | 27.2 (7.1) | 26.6 (5.9) | 27.0 (6.6) |
| 2. Mean weight in kg (SD) | 51.9 (6.6) | 58.4 (10.4) | 56.2 (8.7) | 63.2 (10.5) | 59.1 (10.3) |
| 3. Weight categories, n (%) | |||||
| 3a. Weight in kg < − 75 | 408 (99.8%) | 901 (92.5%) | 2609 (96.8%) | 2384 (85.5%) | 6302 (91.8%) |
| 3b. Weight in kg 75–80 | 0 | 35 (3.6%) | 35 (1.3%) | 198 (7.1%) | 268 (3.9%) |
| 3c. Weight in kg 80 ++ | 1 (0.2%) | 38 (3.9%) | 51 (1.9%) | 207 (7.4%) | 297 (4.3%) |
| 4. Mean height in cm (SD) | 158.4 (6.7) | 162.9 (6.4) | 163.0 (6.1) | 162.1 (7.5) | 162.4 (6.9) |
| 5. BMI categories as kg/m2, n (%) | |||||
| 5a. BMI (<− 25) | 378 (93.3%) | 821 (84.3%) | 2469 (91.6%) | 1760 (63.1%) | 5428 (79.1%) |
| 5b. BMI [25–30) | 20 (4.9%) | 127 (13.0%) | 194 (7.2%) | 799 (28.6%) | 1140 (16.6%) |
| 5c. BMI [30 ++) | 7 (1.7%) | 26 (2.7%) | 32 (1.2%) | 230 (8.2%) | 295 (4.3%) |