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Cross-Tabulation of Correct Diagnoses Made by the General Practitioners.a
| General practitioner | Dermatologist | ||
|---|---|---|---|
| Positive | Negative | Total | |
| Positive | 1313 | 511 | 1824 |
| Negative | 388 | 428 | 816 |
| Total | 1701 | 939 | 2640 |
Sensitivity 77.2%; specificity 45.6%; positive predictive value 72.0%; negative predictive value 52.5%; positive odds ratio 1.4; negative odds ratio 0.5.
