Stepwise binary logistic regression of Delirium Rating Scale-Revised-98 item scores and other variables (dementia; medical specialty) for their level of contribution to correct identification of Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition delirium according to research clinician's diagnosis
| Approach to detection | β | R2 | p Value |
|---|---|---|---|
| Medical case notes | |||
| DRS-R98 Attention | 0.86 | 0.20 | 0.005 |
| DRS-R98 Short-term memory | 0.56 | 0.24 | 0.04 |
| Medical specialty | 1.70 | 0.27 | 0.006 |
| Constant | −1.14 | ||
| Nurse questioning | |||
| DRS-R98 Delusions | 0.88 | 0.33 | 0.04 |
| DRS-R98 Affective lability | 1.11 | 0.41 | 0.02 |
| DRS-R98 Attention | 1.08 | 0.44 | 0.01 |
| DRS-R98 Long-term memory | 0.83 | 0.47 | 0.01 |
| Constant | −3.81 | ||
| Patient self-rating | |||
| DRS-R98 Sleep-wake cycle disturbance | −1.31 | 0.19 | 0.01 |
| DRS-R98 Orientation | 2.02 | 0.25 | <0.001 |
| DRS-R98 Onset | 1.32 | 0.30 | <0.001 |
| Constant | −4.08 |
Only variables with a significant relationship are shown for each approach to detection. Symptoms are relied upon for delirium detection by different involved parties do not overlap a lot across these methods (n=55 point prevalence cases evaluated).