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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.