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Table 4 Validity of ANC indicators from self-reported questionnaire information or the antenatal card

From: Agreement of antenatal care indicators from self-reported questionnaire and the antenatal care card of women in the 2015 Pelotas birth cohort, Rio Grande do Sul, Brazil

Indicators

Self-reported with ANC card as the gold standard

ANC card with self-reported as the gold standard

Sensitivity (%)

95% CI

Specificity (%)

95% CI

Sensitivity (%)

95% CI

Specificity (%)

95% CI

Report of the number of antenatal care visits (≥6)

98.66

98.21–99.12

43.62

40.65–46.60

81.11

79.75–82.46

93.01

90.71–95.31

Report of the last date of menstrual period

99.33

99.02–99.65

1.49

0.72–2.27

72.86

71.45–74.27

45.71

27.78–63.65

Clinical exams

 Weight measurement

99.81

99.66–99.97

0.70

0.02–3.86

96.40

95.80–96.99

12.5

0.31–41.67

 Symphysis-fundal height measurement

99.71

99.52–99.89

3.11

0.80–5.43

93.62

92.84–94.40

42.11

17.27–66.94

 Blood pressure measurement

99.90

99.80–100.00

0.00

 

96.40

95.80–97.01

0.00

 

 Gynecological exam

88.93

87.24–90.61

16.32

14.86–17.78

36.87

35.22–38.52

72.84

69.02–76.59

 Cervical cancer screening test

79.97

77.01–82.94

39.03

37.31–40.74

23.24

21.57–24.91

89.41

87.75–91.06

 Dental exam

36.02

28.85–43.19

64.00

62.45–65.55

4.75

3.60–5.89

95.26

94.41–96.11

 Breast exam

54.34

50.45–58.22

55.09

53.37–56.81

19.60

17.75–21.46

85.69

84.16–87.21

 Venereal disease research lab (VDRL) test

99.83

99.68–99.98

0.29

0.01–1.61

91.24

90.34–92.14

14.29

0.36–47.35

Diseases during pregnancy

 Hypertension

67.44

52.27–82.61

74.84

73.46–76.22

2.89

1.80–3.97

99.52

99.25–99.79

 Anaemia

86.76

80.70–92.83

59.21

57.63–60.79

7.10

5.84–8.36

99.20

98.81–99.59

 Diabetes

66.67

45.72–87.61

91.48

90.60–92.37

4.60

2.25–6.94

99.78

99.61–99.95

 Urinary tract infection

78.57

76.26–80.88

70.10

68.34–71.86

55.33

52.99–57.67

87.40

85.97–88.83

 Sexually transmitted diseases

1.83

0.00–4.81

99.06

98.73–99.38

5.26

0.64–13.68

97.24

96.71–97.77

Vaccination- Supplements

 Tetanus toxoid vaccination

78.57

76.26–80.88

70.10

68.34–71.86

61.18

59.24–63.12

59.66

57.04–62.27

 Hepatitis B vaccination

70.67

68.14–73.19

58.43

56.50–60.36

46.27

44.05–48.50

79.72

77.87–81.57

 Prescription of iron supplements

87.29

85.16–89.41

23.77

22.21–25.33

27.90

26.31–29.50

84.69

82.17–87.21

Counselling

 Risks of alcohol use during pregnancy

81.58

67.94–95.22

25.61

24.22–26.99

1.06

0.67–1.45

99.30

98.73–98.87

 Risks of smoking during pregnancy

82.61

70.57–94.65

24.91

23.53–26.28

1.29

0.87–1.71

99.18

98.56–99.80

 Physical exercises such as walking

33.33

0.84–90.60

38.00

36.47–39.54

0.04

0.00–0.14

99.87

99.65–100.00