Predictive Accuracy of Models of Multimorbidity for Psychological Distress
| Additions to Baseline Model | ||||
|---|---|---|---|---|
| CIRS Quintile Variables | ||||
| Statistical Measures | Baseline Model* | No. of Chronic Diseases | Categorical | Ordinal |
| CIRS = Cumulative Illness Rating Scale; n/a = not applicable; ROC = receiver operating characteristic. * Including only the confounding variables (ie, sex, self-perceived social support, and self-perceived economic status). | ||||
| Deviance | 216.96 | 214.44 | 207.81 | 207.83 |
| Likelihood ratio test | ||||
| χχ2 (df) | n/a | 2.53 (1) | 9.15 (3) | 9.13 (1) |
| P value | .112 | .027 | .003 | |
| Measures of explained variation | 0.0962 | 0.1004 | 0.1299 | 0.1298 |
| r2(y, p̂) | 0.1100 | 0.1197 | 0.1446 | 0.1445 |
| R2 analogue | ||||
| Area under the ROC curve | 0.747 | 0.756 | 0.776 | 0.777 |