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Table 2 Crude and adjusted relative risks of perinatal outcomes

From: Antenatal care packages with reduced visits and perinatal mortality: a secondary analysis of the WHO Antenatal Care Trial

Outcome New model Standard model Crude relative risk (95% CI) Adjusted relative risk (95% CI)‡
N (%) N (%)
Perinatal mortality 234/11672 (2.0) 190/11121 (1.7) 1.20 (1.04, 1.38) 1.18 (1.01, 1.37)*
Neonatal mortality 73/11511 (0.6) 71/11002 (0.7) 0.93 (0.80, 1.09) 0.95 (0.81, 1.11)
Fetal Death 161/11672 (1.4) 119/11121 (1.1) 1.30 (1.04, 1.62) 1.27 (1.03, 1.58)*
Fetal death <=36 weeks 122/11574 (1.1) 77/11048 (0.7) 1.63 (1.29, 2.08) 1.64 (1.27, 2.11)*
Fetal death >36 weeks 37/11574 (0.3) 42/11048 (0.4) 0.81 (0.52, 1.26) 0.78 (0.51, 1.21)
  1. * RR estimates using robust variance Poisson modeling, taking clustering into account.
  2. † Model adjusted for risk strata only.
  3. ‡ Multivariate model adjusted for risk strata, smoking, education less than primary, hospital admission in last pregnancy, previous surgery on reproductive tract, late booking, vaginal bleeding in the first trimester, age, previous low birth weight, parity.