From: External validation of a claims-based algorithm for classifying kidney-cancer surgeries
PROCEDURE BASED ON MEDICARE CLAIMS | ||||
---|---|---|---|---|
Partial Nephrectomy | Radical Nephrectomy | Total | ||
PROCEDURE BASED ON SEER CANCER-DIRECTED SURGERY VARIABLE | Partial Nephrectomy | 495 | 86 | 581 |
Radical Nephrectomy | 88 | 4720 | 4808 | |
Total | 583 | 4806 | 5389 | |
Observed agreement = 96.8% | ||||
Kappa = 0.83 (0.81–0.86) | ||||
Sensitivity † = 85.2% (82.0%–88.0%) | ||||
Specificity † = 98.2% (97.7%–98.5%) | ||||
Positive Predictive Value † = 84.9% (81.7%–87.7%) | ||||
Negative Predictive Value † = 98.2% (98.0%–98.6%) |