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Table 2 Primary outcomes at baseline and endline: difference in difference analysis^

From: The power of peers: an effectiveness evaluation of a cluster-controlled trial of group antenatal care in rural Nepal

 

Baseline

Endline

Difference

Outcomes

Control

Intervention

Diff

Control

Intervention

Diff

Diff-Diff

p-value

Institutional birth rate

79.5%

81.2%

1.7%

94.0%

91.5%

−2.5%

−4.2%

0.25

ANC (4+)

89.8%

80.3%

−9.5%

93.0%

88.8%

−4.2%

5.3%

0.55

Post-partum contraceptive prevalence rate

25.1%

16.2%

−8.9%

59.8%

38.0%

−21.8%

−12.9%

0.22

Stillbirth rate*

4.6

19.3

14.7

19.7

26.6

6.9

−7.8

0.35

Perinatal mortality rate*

23.1

30.0

6.9

24.6

38.5

13.9

7.0

0.80

Infant mortality + Stillbirth rate*

23.1

38.6

15.5

29.6

41.4

11.8

−3.7

0.80

Infant mortality rate*

18.5

19.3

0.8

9.9

14.8

4.9

4.1

0.72

  1. *Results are reported per 1000 total births (= live births + stillbirths)
  2. ^Note: the unit of analysis for the difference in difference analysis is every birth, and not every woman. There are 11 pairs of twins in the baseline and 4 pairs of twins in the endline