TABLE 2.
Predictors of early pregnancy plasma 25(OH)D3 concentration1
| Univariate model | Multivariate model | ||||
|---|---|---|---|---|---|
| n | β ± SE | P | β ± SE | P | |
| Age, y | 863 | 0.27 ± 0.08 | 0.001 | 0.18 ± 0.07 | 0.015 |
| Weight, kg | 863 | −0.03 ± 0.05 | 0.6 | — | — |
| Height, cm | 863 | −0.02 ± 0.09 | 0.8 | — | — |
| BMI, kg/m2 | 863 | −0.06 ± 0.15 | 0.7 | — | — |
| MUAC, cm | 858 | 0.01 ± 0.16 | 1.0 | — | — |
| Triceps skinfold thickness, cm | 858 | −0.04 ± 0.08 | 0.6 | — | — |
| Weeks of pregnancy | 862 | 1.38 ± 0.15 | <0.0001 | 1.34 ± 0.15 | <0.0001 |
1
Biologically plausible predictors of 25(OH)D3 concentration were tested and the multivariate model included Fourier terms to control for the effect of the time of year. Factors were measured on the same day as blood sample collection. Parity was not included in the multivariate model because of a strong correlation with age. MUAC, midupper arm circumference; 25(OH)D3, 25-hydroxycholecalciferol.