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Predictive accuracy of the nomogram in patients who meet the ACOSOG-Z0011 criteria.
| Observed (N) | ||||
|---|---|---|---|---|
| LN ≥ 3 | LN ≤ 2 | Total | ||
| Expected (N) | LN ≥ 3 | 27 | 63 | 90 |
| LN ≤ 2 | 37 | 940 | 977 | |
| Total | 64 | 1003 | 1067 | |
| Accuracy % (95% CI) | 90.8 (0.89–0.92) | |||
| Sensitivity % (95% CI) | 45.3 (0.33–0.58) | |||
| Specificity % (95% CI) | 93.8 (0.92–0.95) | |||
| PPV % (95% CI) | 31.9 (0.25–0.40) | |||
| NPV % (95% CI) | 96.4 (0.96–0.97) | |||
LN, Lymph node; PPV, Positive predictive value; NPV, Negative predictive value; CI, Confidence interval.
