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Table 3 Individual-level validation in surveys and registers for LBW prevalence, EN-BIRTH study (23,471 births)

From: Birthweight: EN-BIRTH multi-country validation study

 

Bangladesh

Nepal

Tanzania

All sites pooled (Random effects)

Azimpur

Kushtia

Pokhara

TZ - Temeke

TZ - Muhimbili

Tertiary

District

Regional

Regional

National

Low birthweight - Survey-reported

 

95% CI

 

95% CI

 

95% CI

 

95% CI

 

95% CI

 

95% CI

 Observer prevalence (%)

12.3

(11.1, 13.5)

20.7

(19.1, 22.4)

12.5

(11.7, 13.3)

7.6

(7, 8.3)

28.1

(26.6, 29.6)

15.6

(9.3, 23.1)

 Survey reported prevalence (%)

19.8

(18.3, 21.5)

18.1

(16.5, 19.8)

11.1

(10.3, 11.8)

6.7

(6, 7.5)

22.0

(20.4, 23.7)

14.3

(8.9, 20.9)

 “Birthweight not informed by provider” (%)

0.9

(0.6,1.4)

0.2

(0.1,0.5)

0.0

(0,0.1)

7.3

(6.6,8.1)

0.9

(0.6,1.4)

1.1

(0.0, 4.3)

 “Don’t know” (%)

4.3

(3.6,5.1)

0.9

(0.6,1.4)

2.7

(2.3,3.1)

4.4

(3.9,5)

3.2

(2.6,4)

2.9

(1.8, 4.3)

 Sensitivity (%)

89.0

(84.9, 92.3)

81.0

(76.9, 84.7)

87.4

(84.8, 89.8)

63.3

(56.8, 69.4)

88.8

(85.8, 91.4)

82.9

(75.1, 89.4)

 Specificity (%)

89.7

(88.4, 91.0)

97.4

(96.5, 98.1)

98.6

(98.3, 98.9)

96.6

(96.0, 97.1)

97.5

(96.7, 98.2)

96.4

(93.5, 98.5)

 Percent agreement (%)

85.0

(83.5, 86.3)

93.1

(92, 94.2)

94.7

(94.2, 95.3)

83.7

(82.6, 84.7)

91.8

(90.7, 92.8)

81.5

(74.3, 87.8)

Low birthweight - Register-recorded

 Observer prevalence (%)

12.3

(11.1, 13.5)

20.7

(19.1, 22.4)

12.5

(11.7, 13.3)

7.6

(7, 8.3)

28.1

(26.6, 29.6)

15.6

(13.9, 14.8)

 Register recorded prevalence (%)

12.3

(11, 13.8)

21.1

(19.2, 23)

12.8

(12, 13.6)

7.5

(6.9, 8.2)

28.1

(26.6, 29.6)

14.9

(8.8, 22.3)

 Sensitivity (%)

93.3

(89.6, 96.0)

88.9

(85.2, 91.9)

94.0

(92.2, 95.5)

81.2

(77.4, 84.6

94.2

(92.5, 95.6)

90.8

(85.9, 94.8)

 Specificity (%)

99.2

(98.6, 99.5)

97.3

(96.3, 98.1)

99.0

(98.7, 99.2)

98.5

(98.1, 98.8)

98.2

(97.6, 98.6)

98.5

(98.0, 99.0)

 Percent agreement (%)

98.3

(96.2, 97.7)

87.6

(82, 85.3)

98.1

(96.1, 96.9)

97.5

(95.4, 96.4)

96.9

(94.6, 96.1)

91.8

(87.6, 95.1)

  1. Don’t know % = proportion of women who answered “Don’t Know” when asked the weight of their child