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Table 5 Results of chart validation of smoking and obesity compared with insurance claims

From: Modification of claims-based measures improves identification of comorbidities in non-elderly women undergoing mastectomy for breast cancer: a retrospective cohort study

 

Chart and claims, n

Chart only, n

Claims only, n

Not in chart or claims, n

Sensitivity, %

Specificity, %

PPV, %

NPV, %

Smoking per claims algorithma versus current smoker in chartb

 Algorithm 1

4

20

1

191

16.67

99.48

80.00

90.52

 Algorithm 2

12

12

7

185

50.00

96.35

63.16

93.91

 Algorithm 3

15

9

14

178

62.50

92.71

51.72

95.19

 Algorithm 4

15

9

15

177

62.50

92.19

50.00

95.16

Smoking per claims algorithma versus current or former smoker in chartb

 Algorithm 1

5

62

0

150

7.46

100.00

100.00

70.75

 Algorithm 2

18

49

1

149

26.87

99.33

94.74

75.25

 Algorithm 3

24

43

5

145

35.82

96.67

82.76

77.13

 Algorithm 4

25

42

5

145

37.31

96.67

83.33

77.54

Obesity per claims algorithma versus BMI ≥ 30 in chartb

 Algorithm 1

4

52

0

118

7.14

100.00

100.00

69.41

 Algorithm 2

7

49

0

118

12.50

100.00

100.00

70.66

 Algorithm 3

10

46

1

117

17.86

99.15

90.91

71.78

  1. BMI body mass index, PPV positive predictive value, NPV negative predictive value
  2. a See Table 1 for description of each algorithm
  3. b Among those with non-missing information in the medical chart (n = 216 current smoker, n = 217 current or former smoker, n = 174 BMI)