Table 1.
The association of variables with 25(OH)D concentration (continuous value) * (N = 13997).
| Variables | N (%) | Serum 25(OH)D | ||
|---|---|---|---|---|
| Mean ± SD | β (se) | p Value | ||
| Gender | ||||
| Boys | 7739 (55.3) | 39 ± 12 | REF | |
| Girls | 6258 (44.7) | 40 ± 12 | 0.13(0.19) | 0.50 |
| Age | ||||
| 0–3 months | 1288 (9.2) | 29 ± 11 | REF | |
| 4–6 months | 2162 (15.5) | 43 ± 11 | 13.27(0.42) | <0.01 |
| 7–12 months | 1577 (11.3) | 45 ± 11 | 15.29(0.44) | <0.01 |
| 1–3 years | 7703 (55.0) | 41 ± 11 | 11.27(0.39) | <0.01 |
| 4–6 years | 786 (5.6) | 27 ± 8 | −3.25(0.45) | <0.01 |
| 7–10 years | 395 (2.8) | 23 ± 7 | −6.79(0.50) | <0.01 |
| 11–17 years | 86 (0.6) | 21 ± 8 | −8.97(0.87) | <0.01 |
| Season | ||||
| Spring | 3919 (28.0) | 39 ± 12 | REF | |
| Summer | 4914 (35.1) | 40 ± 12. | 1.62(0.23) | <0.01 |
| Autumn | 2451 (17.5) | 40 ± 12 | 1.13(0.27) | <0.01 |
| Winter | 2713 (19.4) | 36 ± 12 | −2.56(0.27) | <0.01 |
| Visiting Type | ||||
| Health Examination | 8499 (60.7) | 41 ± 11 | REF | |
| Clinical Visiting | 5498 (39.3) | 37 ± 13 | −0.45(0.21) | 0.03 |
* The generalized estimated equation model includes all variables in this table.