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Table 2 Validity of self-reported data compared to electronic health records

From: Validation of Canadian mothers’ recall of events in labour and delivery with electronic health records

Variable description

Prevalence

Sensitivity (95% CI)

Specificity (95% CI)

True Positives N

False Positives N

False Negatives N

True Negatives N

Kappa (95% CI)

Caesarean delivery

756/2695 (28.1)

99.7

(99.0,100.0)

99.8

(99.6,100.0)

706

3

2

1984

0.99

(0.99,0.99)

Epidural usage

1477/2859

(51.7)

90.7

(89.1,92.2)

82.2

(80.1,84.2)

1340

246

137

1136

0.73

(0.71,0.76)

Infant gender

Males: 1362/2621 (52.0)

99.4

(98.8,99.7)

99.0

(98.2,99.5)

1274

12

8

1180

0.98

(0.98,0.99)

Low birth weight

159/2552 (6.2)

96.5

(92.1,98.9)

97.8

(97.1,98.3)

139

53

5

2355

0.82

(0.77,0.86)

Labour induction

755/2796 (27.0)

87.3

(84.7,89.6)

90.6

(89.2,81.8)

659

192

96

1849

0.75

(0.72,0.78)

Multiple gestation pregnancy

36/2693 (1.3)

94.3

(80.8,99.3)

99.8

(99.6,99.9)

33

5

2

2653

0.90

(0.83,0.97)

Post-term births

1373/2677 (51.3)

94.9

(91.5,97.3)

88.5

(87.1,89.7)

243

279

13

2142

0.57

(0.53,0.61)

Preterm births

208/2677 (7.8)

94.8

(90.6,97.5)

98.4

(97.8,98.8)

182

40

10

2445

0.87

(0.83,0.91)

  1. Note: Prevalence data were obtained from the electronic health records. Denominators differ due to missing data in the EHR.