Table 3.
Odds of 25-hydroxyvitamin D levels <50 nmol/L among Women Reporting No (vs. any) Prenatal Vitamin Use
| Time 1 (Median 9.6 weeks’ gestation) | Time 2 (Median 26.0 weeks’ gestation) | |||
|---|---|---|---|---|
| All Participants: (n=1017, 75% PNV use) | OR | (95% CI) | OR | (95% CI) |
| Model 1: Seasonally-adjusted | 3.9 | (2.9, 5.2) | 2.1 | (1.6, 2.9) |
| Model 2: Model 1 + maternal age, education and smoking | 2.8 | (2.0, 3.8) | 1.5 | (1.1, 2.1) |
| Model 3: Model 2+ BMI | 2.5 | (1.8, 3.5) | 1.3 | (0.9, 1.9) |
| Model 4: Model 3 + maternal race/ethnicity | 2.1 | (1.5, 3.0) | 1.1 | (0.7, 0.9) |
| Overweight/Obese Participants (BMI >= 25kg/m2)(n=461, 67% PNV use) | ||||
| Model 1: Seasonally-adjusted | 4.1 | (2.7, 6.3) | 2.5 | (1.6, 3.7) |
| Model 2: Model 1 + Race | 2.8 | (1.7, 4.4) | 1.6 | (0.99, 2.6) |
| Lean (BMI <25 kg/m2)(n=561, 80% PNV use) | ||||
| Model 1: Seasonally-adjusted | 3.0 | (1.9, 4.8) | 1.4 | (0.9, 2.3) |
| Model 2: Model 1 + Race | 1.8 | (1.0, 3.0 | 0.8 | (0.5, 1.4) |
| Black Participants (n=137, 56 % PNV use) | ||||
| Model 1: Seasonally-adjusted | 1.0 | (0.4, 2.4) | 1.0 | (0.5, 2.1) |
| Model 2: Model 1 + BMI | 1.0 | (0.4, 2.3) | 1.0 | (0.5, 2.2) |
| White Participants (n= 630, 86% PNV use) | ||||
| Model 1: Seasonally-adjusted | 3.5 | (2.1, 5.8) | 1.4 | (0.8, 2.5) |
| Model 2: Model 1 + BMI | 3.3 | (2.0, 5.5) | 1.3 | (0.7, 2.4) |
Abbreviations: BMI, body mass index; PNV, prenatal vitamins.