Table 4. Univariate and multivariate analyses for factors associated with all preterm, early and late preterm birth.
Preterm Birth (24–36 weeks) | Early Preterm Birth (24–33 weeks) | Late Preterm Birth (34–36 weeks) | ||||||
Study Characteristic | Univariate OR, 95% CI | p-value | Adjusted OR (95% CI) | p-value | Adjusted OR, (95% CI) | p-value | Adjusted OR, (95% CI) | p-value |
Age <20 | 1.31 (1.02–1.69) | 0.03 | NS | 1.73 (1.03–2.90) | 0.04 | NS | ||
BMI | 0.93 (0.89–0.98) | 0.006 | 0.91 (0.85–0.97) | 0.005 | NS | 0.91 (0.85–0.98) | 0.01 | |
BMI <18.5 | 1.63 (0.92–2.89) | 0.09 | NS | NS | NS | |||
Weight Gain | 0.90 (0.83–0.97) | 0.008 | 0.89 (0.82–0.97) | 0.006 | NS | 0.89 (0.80–0.96) | 0.005 | |
Ever Anemia (Hb<11.0) | 1.44 (1.12–1.84) | 0.001 | NS | 1.95 (1.08–3.52) | 0.03 | NS | ||
Persistent Anemia (Hb<11.0 at booking visit and at 28–32 weeks ) | 1.36 (1.08–1.73) | 0.99 | NS | NS | NS | |||
Ever Malaria | 1.44 (1.12–1.84) | 0.004 | NS | NS | NS | |||
Persistent Malaria (peripheral slide positive at booking and at 28–32 weeks) | 1.75 (1.10–2.79) | 0.04 | 1.94 (1.06–3.57) | 0.03 | NS | 1.99 (1.05–3.79) | 0.04 | |
Previous Preterm birth | 2.02 (1.27–3.22) | 0.001 | 2.13 (1.19–3.80) | 0.01 | 2.68 (1.10–6.52) | 0.03 | 2.07 (1.11 – 3.86) | 0.02 |
Previous Neonatal Death or Stillbirth | 1.61 (1.05–2.49) | 0.02 | NS | NS | NS |