Table 3 Sensitivity (Sen), specificity (Spec), positive predictive value (PPV) and negative predictive value (NPV) for a range of probability cut-offs for classifying those at high risk of non-response (main model)
Cut-off | Predicted non-responders | Sen | Spec | PPV | NPV |
|---|---|---|---|---|---|
0.5 | 303 (36%) | 59% | 80% | 68% | 72% |
0.6 | 210 (25%) | 45% | 89% | 75% | 69% |
0.7 | 123 (15%) | 30% | 96% | 86% | 65% |
0.8 | 49 (6%) | 14% | 100% | 98% | 61% |
0.9 | 13 (2%) | 4% | 100% | 100% | 59% |