Table 3 Sensitivity analyses by sequential omission of each included study
Study omitted | RR (95% CI) for preterm birth less than 37 weeks of gestation | RR (95% CI) for preterm birth less than 34 weeks of gestation | RR (95% CI) for postpartum hemorrhage | RR (95% CI) for placental abruption | RR (95% CI) for cesarean section | RR (95% CI) for any hypertensive disorder of pregnancy | RR (95% CI) for small for gestational age |
|---|---|---|---|---|---|---|---|
Davies 1995 | / | 0.84 (0.71, 0.99) | / | 2.19 (1.08, 4.47) | 1.05 (1.00, 1.11) | 1.05 (0.97, 1.15) | 0.96 (0.91, 1.02) |
Golding 1998 | 0.95 (0.88, 1.02) | / | 1.26 (1.00, 1.58) | / | 1.04 (0.99, 1.10) | 1.03 (0.94, 1.14) | / |
Hauth 1993 | 0.96 (0.90, 1.02) | / | / | / | 1.05 (1.00, 1.11) | 1.06 (0.97, 1.16) | 0.96 (0.91, 1.02) |
Hoffman 2020 | 1.02 (0.93, 1.12) | 0.91 (0.64, 1.30) | 1.34 (1.13, 1.57) | / | 1.05 (0.96, 1.15) | 1.03 (0.93, 1.15) | 0.97 (0.83, 1.13) |
Rotchell 1998 | 0.94 (0.88, 1.01) | / | / | / | / | 1.05 (0.96, 1.14) | / |
Sibai 1993 | 0.94 (0.88, 1.01) | 0.82 (0.68, 0.99) | 1.34 (1.14, 1.57) | 1.51 (0.68, 3.35) | 1.06 (1.01, 1.12) | 1.08 (0.98, 1.18) | 0.97 (0.92, 1.03) |
Subtil 2003 | 0.94 (0.88, 1.01) | / | 1.32 (1.13, 1.57) | 4.40 (1.26, 15.41) | 1.06 (1.01, 1.12) | 1.03 (0.94, 1.13) | 0.95 (0.90, 1.01) |
All studies | 0.96 (0.90, 1.02) | 0.84 (0.71, 0.99) | 1.32 (1.14, 1.54) | 2.18 (1.10, 4.32) | 1.05 (1.00, 1.11) | 1.05 (0.96, 1.14) | 0.96 (0.91, 1.02) |