Table 3.
Linear regression data of variables associated with 25(OH)D3, DBP, PTH, free 25(OH)D3, and bioavailable 25(OH)D3 concentrations.
| 25(OH)D3 (nmol/L) | DBP (mg/L) | PTH (pg/mL) | Free 25(OH)D3 (pg/mL) | Bioavailable 25(OH)D3 (ng/mL) | |
|---|---|---|---|---|---|
| Independent variable | β (95% CI) | β (95% CI) | β (95% CI) | β (95% CI) | β (95% CI) |
| Gestational period, wk | −0.73 (−1.31; −0.16) | −5.91 (−12.54; 0.72) | 0.03 (−0.67; 0.73) | −0.01 (−0.03; 0.00) | −0.01 (−0.01; 0.00) |
| Prepregnancy BMI, kg/m2 | 0.12 (−0.33; 0.57) | 5.92 (0.74; 11.09) | 0.10 (−0.44; 0.65) | −0.01 (−0.03; 0.00) | −0.00 (−0.01; 0.00) |
| Gestational weight gain, kg | 0.14 (−0.32; 0.61) | 0.87 (−4.47; 5.21) | 0.25 (−0.31; 0.82) | 0.01 (−0.01; 0.02) | 0.00 (−0.00; 0.01) |
| Age, y | −0.20 (−0.66; 0.27) | −0.36 (−5.68; 4.95) | −0.70 (−0.63; 0.49) | −0.01 (−0.02; 0.01) | −0.00 (−0.01; 0.00) |
| ITA | 0.05 (−0.08; 0.174) | −0.21 (−1.67; 1.25) | 0.07 (−0.09; 0.22) | 0.00 (−0.00; 0.01) | 0.00 (−0.00; 0.00) |
| SEI hand | 0.30 (−0.15; 0.74) | 4.97 (−0.13; 10.07) | −0.57 (−1.11; −0.30) | −0.00 (−002; 0.01) | 0.00 (−0.00; −0.01) |
| Number of previous pregnancies | −0.52 (−2.35; 1.30) | −6.63 (−27.66; 14.39) | 1.23 (−0.99; 3.45) | 0.01 (−0.05; 0.07) | −0.01 (−0.02; 0.01) |
| Season | |||||
| Spring | Ref | Ref | Ref | Ref | Ref |
| Summer | −4.78 (−11.21; 1.65) | −71.63 (−145.72; 2.47) | −5.11 (−12.94; 2.73) | 0.00 (−0.20; 0.21) | 0.00 (−0.07; 0.06) |
| Autumn | −9.90 (−16.14; −3.64) | −86.78 (−158.77; −14.79) | −0.80 (−8.41; 6.81) | −0.12 (−0.32; 0.08) | −0.05 (−0.11; 0.01) |
| Winter | −16.74 (−23.13; −10.34) | −85.39 (−159.10; −11.69) | −1.32 (−9.11; 6.48) | −0.33 (−0.53; −0.13) | −0.11 (−0.17; −0.05) |
Results were obtained from multiple linear regression analysis with 25(OH)D3, DBP, PTH, free 25(OH)D3, and bioavailable 25(OH)D3 as dependent variables. ITA, individual typology angle; SEI, sun exposure index.