Table 3 Total bone mineral density by quartiles of serum calcium, stratified by race/ethnicity and age
From: Associations between serum calcium, 25(OH)D level and bone mineral density in adolescents
Quartiles of serum calcium | White | Black | Mexican American | Other race |
|---|---|---|---|---|
Total BMD g/cm2 (95% Confidence Interval) | ||||
12 to 15 years | ||||
Lowest quartile | 1.012 (0.994, 1.029) | 1.069 (1.055, 1.083) | 1.015 (1.000, 1.031) | 1.015 (0.983, 1.047) |
2nd | 1.011 (0.996, 1.026) | 1.068 (1.055, 1.081) | 1.008 (0.995, 1.021) | 1.024 (1.000, 1.048) |
3rd | 1.011 (0.998, 1.025) | 1.065 (1.052, 1.077) | 1.010 (0.998, 1.023) | 1.027 (1.002, 1.052) |
Highest quartile | 1.006 (0.995, 1.017) | 1.062 (1.052, 1.072) | 0.994 (0.983, 1.005) | 0.998 (0.978, 1.018) |
P for trend | 0.540 | 0.383 | 0.031 | 0.200 |
16 to 19 years | ||||
Lowest quartile | 1.132 (1.118, 1.146) | 1.207 (1.195, 1.220) | 1.120 (1.109, 1.131) | 1.139 (1.116, 1.162) |
2nd | 1.137 (1.124, 1.151) | 1.203 (1.190, 1.216) | 1.117 (1.105, 1.128) | 1.164 (1.139, 1.189) |
3rd | 1.140 (1.127, 1.152) | 1.214 (1.202, 1.225) | 1.117 (1.105, 1.129) | 1.132 (1.108, 1.156) |
Highest quartile | 1.137 (1.126, 1.148) | 1.207 (1.196, 1.219) | 1.113 (1.102, 1.125) | 1.152 (1.127, 1.176) |
P for trend | 0.598 | 0.722 | 0.485 | 0.883 |