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Table 3 Unadjusted and adjusted Relative Risk Ratios1

From: Pregnancy intervals after stillbirth, neonatal death and spontaneous abortion and the risk of an adverse outcome in the next pregnancy in rural Bangladesh

Preceding outcome=spontaneous abortion

Index outcome

Unadjusted

Adjusted

Relative risk ratio

Lower CI

Upper CI

Relative risk ratio

Lower CI

Upper CI

Live birth

Reference outcome

Spontaneous abortion

 <=6 months

22.94

15.64

33.63

23.21

10.34

52.13

 7-14 months

2.14

1.62

2.83

1.80

0.98

3.33

 15-26 months

1.22

0.91

1.64

1.05

0.55

2.01

 27-50 months

Reference

 51-74 months

1.23

0.69

2.19

0.33

0.11

0.98

 75-263 months

1.72

0.73

4.03

0.28

0.05

1.59

Stillbirth

 <=6 months

1.44

0.49

4.28

1.36

0.45

4.07

 7-14 months

1.16

0.73

1.85

1.05

0.65

1.69

 15-26 months

0.89

0.54

1.45

0.80

0.49

1.32

 27-50 months

Reference

 51-74 months

1.88

0.85

4.13

1.66

0.74

3.74

 75-263 months

0.67

0.09

5.08

0.73

0.09

5.68

Neonatal death

 <=6 months

1.50

0.51

4.47

1.39

0.46

4.16

 7-14 months

1.74

1.10

2.75

1.55

0.97

2.46

 15-26 months

1.28

0.80

2.07

1.17

0.72

1.90

 27-50 months

Reference

 51-74 months

1.30

0.52

3.26

1.09

0.42

2.82

 75-263 months

1.39

0.32

6.14

1.20

0.26

5.61

Preceding outcome=Stillbirth

Index outcome

Unadjusted

Adjusted

Relative risk ratio

Lower CI

Upper CI

Relative risk ratio

Lower CI

Upper CI

Live birth

Reference outcome

Spontaneous abortion

 <=6 months

16.92

8.31

34.45

29.60

8.09

108.26

 7-14 months

1.66

1.05

2.63

1.84

0.84

4.02

 15-26 months

1.06

0.66

1.71

0.76

0.35

1.65

 27-50 months

Reference

 51-74 months

0.55

0.16

1.86

0.36

0.07

2.00

 75-263 months

0.84

0.19

3.68

0.82

0.09

7.44

Stillbirth

 <=6 months

2─

─

─

─

─

─

─

─

 7-14 months

1.84

1.29

2.64

2.00

1.39

2.88

 15-26 months

1.31

0.91

1.89

1.33

0.92

1.91

 27-50 months

Reference

 51-74 months

1.10

0.53

2.26

1.12

0.54

2.34

 75-263 months

1.00

0.34

2.94

1.02

0.34

3.02

Neonatal death

 <=6 months

0.79

0.10

6.14

0.82

0.10

6.42

 7-14 months

1.46

0.90

2.37

1.44

0.88

2.37

 15-26 months

1.36

0.85

2.18

1.29

0.79

2.09

 27-50 months

Reference

 51-74 months

0.99

0.37

2.66

0.99

0.36

2.73

 75-263 months

1.36

0.39

4.71

1.34

0.37

4.76

Preceding outcome=Neonatal Death

Index outcome

Unadjusted

Adjusted

Relative risk ratio

Lower CI

Upper CI

Relative risk ratio

Lower CI

Upper CI

Live birth

Reference outcome

Spontaneous abortion

 <=6 months

25.17

13.58

46.64

28.20

8.59

92.63

 7-14 months

1.61

1.06

2.46

1.97

1.00

3.89

 15-26 months

1.07

0.70

1.65

1.59

0.81

3.12

 27-50 months

Reference

 51-74 months

1.06

0.46

2.44

1.05

0.27

4.06

 75-263 months

2.98

1.32

6.74

1.97

0.49

7.91

Stillbirth

 <=6 months

8.44

3.12

22.84

10.05

3.64

27.74

 7-14 months

2.88

1.72

4.84

3.08

1.82

5.22

 15-26 months

2.24

1.34

3.75

2.32

1.38

3.91

 27-50 months

Reference

 51-74 months

1.09

0.36

3.24

1.02

0.33

3.11

 75-263 months

4.67

1.88

11.57

4.01

1.55

10.33

Neonatal death

 <=6 months

3.17

1.33

7.59

3.22

1.33

7.80

 7-14 months

2.83

2.08

3.84

2.81

2.06

3.84

 15-26 months

1.71

1.25

2.33

1.70

1.24

2.33

 51-74 months

0.52

0.22

1.24

0.54

0.23

1.28

 75-263 months

1.07

0.41

2.78

1.14

0.43

3.01

  1. 1The reference IOI=27-50 months, reference outcome=live birth. Models adjusted for multiple/single pregnancy; mother’s education, parity at current birth, and maternal age at current birth; household socio-economic status (SES) index; Projahnmo study arm; whether the mother attended at least one antenatal care visit, and place of delivery (home versus facility )
  2. 2Too little data to get estimates; bias in recall of outcome dates
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BMC Pregnancy and Childbirth

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