Table 1.
Demographic and clinical characteristics of the study patients
| Number of patients | 93 | |
| Number of males | 64 | 68.8% |
| Age (years) median (IQR) | 74 | (66-78) |
| Education (years): < 8 | 33 | 35.4% |
| 8-13 | 53 | 60.6% |
| > 13 | 7 | 7.5% |
| MMSE adjusted median (IQR) | 26 | (25-28) |
| Use of any benzodiazepines | 11 | 11.8% |
| Use of any antidepressants | 8 | 8.6% |
| Use of antihypertensive drugs | 78 | 83.8% |
| Use of B-blockers | 22 | 23.6% |
| Use of any statins | 24 | 25.8% |
| Smoking habits: no | 25 | 26.9% |
| former | 55 | 59.1% |
| yes | 13 | 14.0% |
| Alcohol: no | 49 | 52.6% |
| sometimes | 31 | 33.4% |
| every day | 13 | 14.0% |
| Type of surgery: General | 24 | 25.8% |
| Orthopaedic | 33 | 35.4% |
| Urologic | 36 | 38.8% |
| Type of anaesthesia: regional ± general | 19 | 20.5% |
| general | 74 | 79.5% |
| ICU and hospital course | ||
| SAPS II median (IQR) | 29 | (24-43) |
| Number of patients ventilated | 41 | 44.0% |
| Duration of ventilation (h) median (IQR) | 6 | (4-19) |
| Number of patients with delirium in ICU | 6 | 6.4% |
| ICU LOSa (days) median (IQR) | 2 | (1-3) |
| Hospital LOSa (days) median (IQR) | 7 | (5-10) |
a LOS: Length of stay