Incremental Predictive Value of Adding Insomnia (ISI) to Base Models.
Incremental Predictive Value of Adding Insomnia (ISI) to Base Models.
| Scale | Model | AUC (95% CI) | ΔAUC (DeLong P) | IDI % (P) | NRI cat % (P) | NRI cont % (P) | Brier Score | Calib Slope | HL P Value |
|---|---|---|---|---|---|---|---|---|---|
| FINDRISC | Base | 0.781 (0.770–0.792) | — | — | — | — | 0.162 | 0.97 | 0.42 |
| FINDRISC | Base +ISI | 0.796 (0.786–0.807) | +0.015 (P=0.002) | +1.9 (P=0.004) | +4.8 (P=0.03) | +7.2 (P<0.001) | 0.157 | 0.99 | 0.51 |
| QDScore | Base | 0.794 (0.782–0.806) | — | — | — | — | 0.154 | 0.95 | 0.37 |
| QDScore | Base +ISI | 0.809 (0.798–0.820) | +0.015 (P=0.001) | +2.4 (P=0.002) | +5.6 (P=0.02) | +8.1 (P<0.001) | 0.149 | 1.01 | 0.63 |
| TRAQ-D | Base | 0.773 (0.760–0.786) | — | — | — | — | 0.168 | 0.94 | 0.33 |
| TRAQ-D | Base +ISI | 0.788 (0.776–0.800) | +0.015 (P=0.003) | +2.0 (P=0.005) | +4.3 (P=0.04) | +6.5 (P=0.002) | 0.163 | 0.98 | 0.46 |
Base model: age, sex, social class, smoking, Mediterranean diet adherence, and physical activity. AUC: area under the receiver operating characteristic curve with 95% confidence intervals; ΔAUC tested with DeLong’s test. Calibration assessed by calibration slope (ideal=1.0) and Hosmer–Lemeshow (HL) goodness-of-fit P-value.
Calib, calibration; cat, categorical at pre-specified thresholds; cont, continuous; IDI, integrated discrimination improvement; ISI, Insomnia Severity Index; FINDRISC, Finnish Diabetes Risk Score; NRI, net reclassification improvement; QDScore, QResearch-derived diabetes risk score; TRAQ-D, Trinidad Risk Assessment Questionnaire for Type 2 Diabetes Mellitus.