Table 3. Multivariate Analysis (Logistic Regression) for Delirium.
| Adjusted OR | 95% CI | P Value | |
|---|---|---|---|
| Age, y | 1.050 | 1.016 - 1.085 | 0.003 |
| Sex | |||
| Male | Ref. | ||
| Female | 0.455 | 0.261 - 0.791 | 0.005 |
| ASA classification | |||
| I | Ref. | ||
| II | > 999 | 0.000 - NA | 0.998 |
| III | > 999 | 0.000 - NA | 0.998 |
| IV | > 999 | 0.000 - NA | 0.998 |
| Cognitive impairment | |||
| No | Ref. | ||
| Yes | 1.950 | 1.135 - 3.350 | 0.016a |
| Operating time, min | 1.002 | 0.991 - 1.013 | |
| Intrathecal anesthesia | |||
| SIM | Ref. | ||
| SA | 4.723 | 1.062 - 21.006 | 0.041a |
| Fracture treatment | |||
| Prosthesis | Ref. | ||
| Osteosynthesis | 0.476 | 0.278 - 0.815 | 0.007a |
Abbreviations: CI, confidence interval (of OR); min, minutes; NA, not available; OR, Odds Ratio; Ref., reference; SA, spinal anesthesia; SIM, spinal anesthesia with intrathecal morphine; y, years.
aIt indicate statistical significance.