Association of depression with mortality, ICU admission, LOS, ICU LOS, and surgical intervention before adjustment for confounding factors
| Outcome | No depression (n=4305) | Pre-existing depression (n=297) | P value |
| Mortality, n (%) | 562 (13) | 20 (7) | 0.001* |
| ICU admission, n (%) | 2162 (50) | 160 (54) | 0.231 |
| LOS, median (IQR) days | |||
| Intensive care unit | 1 (0–5) | 1 (0–8) | 0.022† |
| Hospital | 13 (6–25) | 18 (9–34) | <0.001† |
| Needed surgery, n (%) | 2214 (51) | 175 (59) | 0.014* |
*Statistically significant using Fisher’s exact test.
†Statistically significant using Mann-Whitney U test.
ICU, intensive care unit; LOS, length of stay.