Table 4 Risk factors for anemia and IDA
Factors | Anemia: adjusted OR (95% CI)a | IDA: adjusted OR (95% CI)b |
|---|---|---|
Trimester | ||
 Second vs. First | 4.11 (3.02–5.57) | 4.99 (3.13–7.95) |
 Third vs. First | 6.10 (4.52–8.22) | 11.72 (7.43–18.49) |
Maternal age (≥35 vs. < 35 years) | 1.22 (1.06–1.40) | – |
Local residents (No vs. Yes) | 1.18 (1.02–1.36) | 1.20 (1.02–1.42) |
Multiple gestations (Yes vs. No) | 1.54 (1.13–2.09) | 1.90 (1.38–2.62) |
Parity (Multiparity vs. Nulliparity) | 1.18 (1.06–1.31) | 1.28 (1.14–1.44) |
Pre-pregnancy BMI | ||
 Underweight vs. Normal weight | 1.32 (1.17–1.49) | 1.30 (1.13–1.49) |
 Overweight and obese vs. Normal weight | 0.67 (0.57–0.80) | 0.62 (0.51–0.77) |
NVP | ||
 Slight vs. No | 1.05 (0.93–1.18) | 1.06 (0.93–1.22) |
 Severe vs. No | 1.21 (1.04–1.41) | 1.21 (1.02–1.44) |
Intake of multivitamins (Yes vs. No) | 0.58 (0.52–0.65) | 0.49 (0.43–0.55) |
IDA before pregnancy (Yes vs. No) | 2.92 (2.41–3.54) | 2.81 (2.28–3.48) |
Other hematologic diseases (Yes vs. No) | 8.25 (5.19–13.13) | 2.00 (1.25–3.20) |
Meat intake (kg/week) | 0.81 (0.68–0.96) | 0.80 (0.65–0.98) |