Table 4 Validation of Charlson comorbidity coding in the administrative database continued. Sensitivity, specificity, PPV and NPV with 95% CI of administrative data in identifying preoperative Charlson comorbidities, stratified by comorbidity type
From: Postoperative complications following colectomy for ulcerative colitis: A validation study
| Â | n | Sensitivity | Specificity | PPV | NPV |
|---|---|---|---|---|---|
Mild liver disease | Â | Â | Â | Â | Â |
     Totalα | 21 | 0.19 | 0.99 | 0.44 | 0.97 |
     Activeβ | 6 | 0.33 | 0.99 | 0.22 | 0.99 |
Moderate/severe liver disease | Â | Â | Â | Â | Â |
     Total | 5 | 0.40 | 1.00 | 0.50 | 0.99 |
     Active | 4 | 0.50 | 1.00 | 0.50 | 1.00 |
Myocardial infarction | Â | Â | Â | Â | Â |
     Total | 21 | 0.38 | 0.99 | 0.67 | 0.98 |
     Active | 1 | 1.00 | 0.98 | 0.08 | 1.00 |
Peptic ulcer disease | Â | Â | Â | Â | Â |
     Total | 11 | 0.27 | 0.99 | 0.50 | 0.99 |
     Active | 3 | 1.00 | 0.99 | 0.50 | 1.00 |
Peripheral vascular disease | Â | Â | Â | Â | Â |
     Total | 6 | 0.17 | 1.00 | 0.33 | 0.99 |
     Active | 1 | 0.00 | 0.99 | 0.00 | 1.00 |
Renal disease | Â | Â | Â | Â | Â |
     Total | 8 | 0.13 | 1.00 | 0.50 | 0.99 |
     Active | 3 | 0.33 | 1.00 | 0.50 | 1.00 |
Rheumatoid arthritis or collagen disease | Â | Â | Â | Â | Â |
     Total | 38 | 0.13 | 1.00 | 0.83 | 0.94 |
     Active | 12 | 0.17 | 0.99 | 0.33 | 0.98 |