Table 1.
Description of population and relevant risk factors for delirium.
| Study Group N = 69 |
Control Group N = 67 |
P-value | |||
|---|---|---|---|---|---|
| Patient | age | years, mean (range) | 57 (19 to 81) | 62 (18 to 84) | 0.57 |
| characteristics | gender | male | 68.1% | 64.2% | 0.72 |
| education | university | 7.2% | 11.9% | 0.07 | |
| college | 40.6% | 19.4% | |||
| high school | 42.0% | 55.2% | |||
| other | 10.1% | 13.4% | |||
| smoking | daily smoking | 20.3% | 23.9% | 0.68 | |
| number of cigarettes per day when smoking | 17.4 | 11.8 | 0.14 | ||
| alcohol | regular use | 46.4% | 40.3% | 0.49 | |
| number of units/week when regularly use | 6.7 | 5.8 | 0.65 | ||
| living single at home | yes | 18.8% | 28.4% | ||
| professionally active | yes | 46.4% | 31.3% | 0.01 | |
| kids | yes | 73.9% | 73.1 | 0.92 | |
| Chronic pathology | ≥ 1 Comorbidity | yes | 68.1% | 75.8% | 0.32 |
| Acute illness | TISS 28 | mean (range) | 24.5 (9 to 40) | 24.5 (11 to 43) | 0.74 |
| SOFA score first 24 hrs | mean (range) | 7.2 (1 to 14) | 7.0 (2 to 15) | 0.65 | |
| SAPS 3 score | mean (range) | 42.5 (0 to 78) | 42.1 (0 to 78) | 0.89 | |
| admission | surgery | 69.6% | 79.1% | 0.20 | |
| internal medicine | 30.4% | 20.9% | |||
| emergency surgery versus scheduled research | 21.6% | 29.7% | 0.30 | ||
| first time intensive care | yes | 65.2% | 44.8% | 0.02 | |
| Maximal RIFLE | No acute kidney injury | 3.1% | 9.5% | 0.22 | |
| score during study | risk | 9.2% | 3.2% | ||
| injury | 20.0% | 15.9% | |||
| failure | 67.7% | 71.4% | |||
| SLEDD necessity | Number of patients | 4 | 5 | 0.52 | |
| length in study | mean hours of observation per patient (SD) | 42.8 (25.7) | 32.6 (25.7) | 0.02 | |
| Environment | intensive care unit | study unit 1 | 21.7% | 17.9% | 0.57 |
| study unit 2 | 21.7% | 26.9% | |||
| study unit 3 | 29.0% | 20.9, % | |||
| study unit 4 | 27.5% | 34.3% | |||
| visible clock | yes | 95.7% | 89.6% | 0.17 | |
| visible daylight | yes | 60.9% | 67.2% | 0.45 | |
| isolation | yes | 2.9% | 6.0% | 0.38 | |
| no visit | yes | 0.0% | 4.5% | 0.12 | |
| room | open | 39.1% | 56.7% | 0.12 | |
| separated by walls, open end | 18.8% | 11.9% | |||
| closed box | 42.0% | 31.3% |
P-value was calculated using independent-samples T test, Mann Whitney U test or Chi square where appropriate. N, number; RIFLE, Risk, Injury, Failure, Loss and End Stage; SAPS 3, Simplified Acute Physiology Score 3; SLEDD, sustained low-efficiency daily dialysis; SOFA, Sepsis-related Organ Failure Assessment; TISS 28, Therapeutic Intervention Scoring System.