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Table 3 Comparison of Ndolage and Kilosa delivery data between, 1997–1999

From: The impact of endemic and epidemic malaria on the risk of stillbirth in two areas of Tanzania with different malaria transmission patterns

Malaria transmission level Location Stillbirth* Low birthweight**
All PG MG All PG MG
Between malaria seasons Ndolage 2.4 1.2 3.2 9.8 14.4 7.1
  Kilosa 5.6 4.6 6.3 15.4 23.0 10.0
  Odds ratio 2.4 (1.7–3.5) 2.9 (1.8–8.5) 2.1 (1.3–3.1) 1.68 (1.36–2.07) 1.8 (1.3–2.4) 1.5 (1.1–2.0)
  p-value <0.001 <0.001 <0.001 <0.001 <0.001 0.021
Malaria seasons Ndolage 1.9 2.5 1.4 11.7 13.9 9.8
  Kilosa 5.9 5.1 6.5 16.5 25.2 10.2
  Odds ratio 3.2 (1.7–5.9) 2.1 (0.9–5.3) 4.98 (2.08–11.92) 1.5 (1.2–1.9) 2.1 (1.4–3.0) 1.1 (0.8–1.6)
  p-value <0.001 >0.05 <0.001 0.001 <0.001 >0.05
ENSO Ndolage 4.1 3.5 4.5 12.4 22.2 7.4
  Kilosa 4.9 3.3 5.9 14.6 19.8 11.1
  Odds ratio 1.2 (0.8–1.8) 0.9 (0.4–2.1) 1.3 (0.8–2.2) 1.2 (0.8–1.8) 0.9 (0.5–1.5) 1.6 (0.9–2.8)
  p-value >0.05 >0.05 >0.05 >0.05 >0.05 >0.05
  1. *twins excluded** twins and stillbirth excluded, risk period for low birthweight is calculated to start 3 months after the peak malaria period and to last for 5 months.