Geographical distribution of sample, The China Child and Adolescent Cardiovascular Health (CCACH) Study (n=10 818)
| Geographical area | Province/Centre | Latitude | n | % | TBLH BMD |
| Northeast | Jilin | N 40°52’~46°18’ | 1661 | 15.4 | 0.785±0.160 |
| North China | Beijing | N39°26’~41°03’ | 1739 | 16.1 | 0.734±0.151 |
| Tianjin | N38°33’~40°15’ | 1653 | 15.3 | ||
| Northwest | Ningxia | N35°14’~39°23’ | 1315 | 12.2 | 0.743±0.129 |
| East China | Shanghai | N30°40’~31°53’ | 1613 | 14.9 | 0.740±0.131 |
| Shandong | N34°25’~38°23’ | 1437 | 13.3 | ||
| Southwest | Chongqing | N28°10’~32°13’ | 1400 | 12.9 | 0.778±0.143 |
| F* | 163.11 | ||||
| p | <0.0001 |
*Analysis of covariance, adjusted for age and sex.
BMD, bone mineral density; TBLH, total body less head.