Table 1 Demographic and baseline characteristics
Sample n = 190 | Delirious n = 78 | Non-delirous n = 112 | OR (95% CI) | |
|---|---|---|---|---|
Age, mean (SD) | 75.7 (5.9) | 77.4 (5.8) | 74.5 (5.6) | 1.09 (1.04–1.15) |
Male gender, n (%) | 99 (52.1) | 43 (55) | 56 (50) | 1.22 (0.69–2.19) |
Living situation, n (%) | ||||
Alone | 50 (26.3) | 21 (26.9) | 29 (25.9) | 1.05 (0.55–2.03) |
Together | 140 (73.7) | 57 (73.1) | 83 (74.1) | 0.95 (0.49–1.83) |
Educational level, n (%) | ||||
< age 15 | 78 (41.3) | 35 (44.9) | 43 (38.7) | 1.95 (0.82–4.63) |
Age 16–18 | 77 (40.7) | 33 (42.3) | 44 (39.6) | 0.92 (0.49–1.74) |
College or university | 34 (18.0) | 10 (12.8) | 24 (21.6) | 0.51 (0.22–1.21) |
Treatment allocation, n (%) | ||||
Intervention | 94 (49.5) | 37 (47.4) | 57 (50.9) | 0.87 (0.49–1.55) |
Anxiety measures | ||||
APAIS-A score (4–20), mean (SD) | 9.1 (3.8) | 8.9 (43.8) | 9.2 (3.8) | 0.98 (0.91–1.06) |
APAIS-A score ≥ 11, n (%) | 59 (31.1) | 21 (26.9) | 38 (33.9) | 0.72 (0.38–1.35) |
APAIS-NFI (2–10), mean (SD) | 5.4 (2.5) | 5.0 (2.4) | 5.6 (2.5) | 0.91 (0.81–1.03) |
APAIS-NFI score ≥ 5, n (%) | 111 (58.4) | 42 (53.9) | 69 (61.6) | 0.73 (0.40–1.31) |
VAS-A for Anaesthesia (0–100), median (IQR) | 24 (39) | 25 (42) | 22 (39.5) | 1.00 (0.99–1.02) |
VAS-A for Surgery (0–100), median (IQR) | 37 (42) | 37.5 (43) | 37 (42) | 0.99 (0.98–1.01) |
Pre-operative Mini-Mental State Examination score (0–30), mean (SD) | 27.8 (2.1) | 27.5 (1.9) | 28.0 (2.2) | 0.88 (0.77–1.01) |
Geriatric Depression Scale (0–10), median (IQR) | 1 (2) | 1 (2) | 1 (2) | 1.05 (0.88–1.26) |
Katz ADL index (0–12), median (IQR) | 0 (0) | 0 (0) | 0 (0) | 0.95 (0.73–1.25) |
Smoking status (Yes), n (%) | 12 (6.3) | 4 (5.1) | 8 (7.1) | 1.13 (0.83–1.52) |
Drinking status (Yes), n (%) | 70 (36.8) | 23 (29.5) | 47 (42.0) | 0.68 (0.40–1.16) |
Diabetes mellitus (Yes), n (%) | 48 (25.3) | 26 (33.3) | 22 (19.6) | 2.05 (1.05–3.97) |
25-hydroxy vitamin D (25-OHD) (nmol/l), median (IQR) | 22.4 (15.2) | 20.7 (12.6) | 24.2 (18.9) | 0.98 (0.92–1.04) |