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Table 3 The association between maternal COVID-19 diagnosis and preterm births from mothers receiving the cesarean section

From: Pregnant women with COVID-19 and risk of adverse birth outcomes and maternal-fetal vertical transmission: a population-based cohort study in Wuhan, China

COVID-19 Preterm birth OR (95% CI) OR (95% CI)
Yes No
Free 363 5657 1.00 1.00
Confirmed 9 43 3.26 (1.58, 6.74) 3.71 (1.70, 8.03)
  1. Crude ORs
  2. Adjusted for maternal age (14–24, 25–34, 35–54), occupation (employed, housewives, part-time), education (bachelor’s degree or above, high school, vocation degree, middle school or below), gravidity (1, 2, 3–10), parity (1, 2, 3–5), gestational hypertension (yes, no), preeclampsia (yes, no), gestational diabetes mellitus (yes, no), and premature rupture of membranes (yes, no)