Table 3—

Factors independently associated with spontaneous and indicated preterm delivery

Spontaneous preterm delivery
Indicated preterm delivery
OR95% CIPOR95% CIP
Age >35 vs. 25–35 years2.30.4–15.20.380.70.2–3.30.70
Age <25 vs. 25–35 years5.20.8–32.80.080.70.1–10.30.77
Nulliparous2.10.4–10.50.3712.02.3–64.10.003
HbA1c ≥7% at delivery5.31.1–26.80.047.51.5–37.90.01
Progression of nephropathy7.71.3–46.90.03
Preeclampsia12.03.1–47.1<0.001
  • Data are OR and its 95% CI vs. reference group. Final multivariate model included maternal age and variables associated with the outcome with P < 0.05. In this model, HbA1c at delivery was dichotomous ≥7% vs. <7%.