Table 2 Logisitic regression of risk of stillbirth in all deliveries and of low birthweight in primigravidae, 1994–1999; one predictor was fitted in each analysis i.e. risk period as defined in the main text. Overall significance of risk period in Ndolage for stillbirth and LBW was p = 0.002 and p = 004 respectively, and for Kilosa was p = 0.55 and p = 0.25 respectively

Between malaria seasons

Reference

Reference

Between risk periods

Reference

Reference

Dec 93-Feb 94

0.7 (0.3–1.6)

N/A

April 94-Aug 94

1.1 (0.8–1.7)

N/A

April 94-Aug 94

1.3 (0.8–2.2)

N/A

Sep 94-Jan 95

1.7 (1.2–2.5)^§

N/A

April 95-Sep 95

1.3 (0.8–2.1)

N/A

Sep 95-Jan 96

1.4 (0.9–2.0)

N/A

April 96-July 96

0.6 (0.3–1.4)

N/A

Aug 96-Dec 96

0.7 (0.4–1.2)

N/A

Oct 96-Jan 97

0.4 (0.1–1.1)

N/A

Feb 97-June 97

1.0 (0.6–1.5)

N/A

Jun 97-Aug 97

0.4 (0.1–1.2)

1.2 (0.7–2.1)

Sep 97-Jan 98

0.6 (0.3–1.0)

1.0 (0.7–1.4)

Nov 97-Aug 98**

1.9 (1.3–2.9)^†

0.8 (0.6–1.2)

April 98-Aug 98

1.7 (1.1–2.6)^§

0.8 (0.6–1.2)

May 99-July 99

1.6 (0.9–2.9)

0.9 (0.5–1.6)

Aug 99-Dec 99

1.2 (0.8–1.7)

1.3 (0.9–2.0)