Skip to main content

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)