Pregnancy outcomes
Total a
Unvaccinated N (%) Vaccinated N (%) Risk Ratios RR (95% CI)
p-value
Adjusted b aRR (95% CI)
p-value
Chorioamnionitis and/or funisitis 23/1272 (1.8) 7/253 (2.7) 16/1019 (1.5) 0.52 (0.21, 1.26) 0.149 0.71 (0.27, 1.82) 0.481
Placental abruption 32/1266 (3.3) 7/250 (2.8) 25/1016 (2.4) 0.90 (0.37, 2.20) 0.833 1.04 (0.41, 2.62) 0.923
Postpartum haemorrhage 115/1269 (9.0) 26/251 (10.3) 89/1018 (8.7) 0.85 (0.55, 1.31) 0.475 0.81 (0.52, 1.26) 0.357
Birth outcomes
Apgar at 1 min <7 149/1263 (11.8) 30/247 (12.1) 119/1016 (11.7) 0.91 (0.62, 1.34) 0.646 0.87 (0.59, 1.29) 0.496
Apgar at 5- min <7 26/1265 (2.0) 6/248 (2.4) 20/1017 (1.9) 0.84 (0.31, 2.25) 0.738 0.75 (0.27, 2.06) 0.582
Admitted to Neonatal unit c 285/1272 (22.4) 65/253 (25.6) 220/1019 (21.5) 0.81 (0.64, 1.04) 0.115 0.84 (0.66, 1.07) 0.177
Respiratory distress syndrome 10/1272 (0.7) 3/253 (1.1) 7/1019 (0.6) 0.56 (0.14, 2.16) 0.406 0.61 (0.20, 1.82) 0.384
Mechanical ventilation 42/1272 (3.3) 9/253 (3.5) 33/1019 (3.2) 0.78 (0.38, 1.63) 0.526 0.71 (0.34, 1.50) 0.381