Table 4.
Total pathology skin specimens, identified and Confirmed Nonmelanoma Skin Cancer Cases with Sensitivity, Specificity, Negative (NPV) and Positive Predictive Values (PPV), 2007-2008, Clinic Log Data.
| Identification Algorithm |
Identified Cases by Algorithm |
Confirmed Cases |
Sensitivity (95% CI) |
Specificity (95% CI) |
NPV (95% CI) |
PPV (95% CI) |
|---|---|---|---|---|---|---|
| ICD-9-CM code alone |
626 | 540 | 59.4 (56.2-62.6) |
97.7 (97.2-98.2) |
90.7 (89.8-91.6) |
86.3 (83.6-89.0) |
| CPT code alone |
544 | 501 | 55.1 (51.9-58.3) |
98.8 (98.5-99.2) |
90.0 (89.0-90.9) |
92.1 (89.8-94.4) |
| Both ICD-9- CM and CPT codes |
487 | 462 | 50.8 (47.6-54.1) |
99.3 (99.1-99.6) |
89.2 (88.2-90.1) |
94.9 (92.9-96.8) |
NPV, Negative Predictive Value; PPV, Positive Predictive Value; CI, Confidence Interval; ICD-9-CM, International Classification of Diseases, 9th Revision, Clinical Modification; CPT, Current Procedural Terminology.
Study Population: large integrated health system, single clinical site, southeastern MI USA.
Standard: Co-Path3 electronic histopathology data.
Total Skin Pathology Cases: 4, 614