Table 1 Baseline characteristics of patients with and without postoperative delirium

Age (years)

82.9 ±4.5

84.6 ±5.2

0.18

Gender n/N (% female)

26/38 (68.4)

16/23 (69.9)

0.93

Living independently, n/N (%)

25/38 (65.8)

15/23 (65.2)

0.68

Low educational level, n/N (%)

13/36 (36.1)

7/22 (31.8)

0.78

Visual impairment^a, n/N (%)

2/38 (5.3)

1/21 (4.8)

0.93

APACHE II^b score

13 (11–13)

13 (12–14)

0.20

ASA^c group, n/N (%)

0.04

Group I;

17/38 (44.7)

4/23 (17.4)

   II;

17/38 (44.7)

12/23 (52.2)

   III;

4/38 (10.5)

7/23 (30.4)

Number of co-morbid diseases

1.0 (1.0-2.0)

2.0 (1.0-2.0)

0.26

Number of medications at home

2.5 (1.0-5.0)

4.0 (3.0-5.0)

0.06

IQCODE-N^d score

3.2 (3.0-3.4)

3.8 (3.3-4.1)

<0.001

IQCODE-N^d score >3.6, n/N (%)

4/37 (10.8)

13/21 (61.9)

<0.001

MMSE^e score

25.6 ±2.5

23.2 ±3.6

0.005

MMSE^e score <24, n/N (%)

8/37 (21.6)

11/22 (50.0)

0.04

GDS^f score

2.0 (1.0-3.0)

2.0 (1.0-3.0)

0.96

BI^g score

19.0 (17.9-20.0)

18.0 (14.8-20.0)

0.03

Lawton IADL^h score

10.0 (8.0-14.7)

14.5 (11.3-17.8)

0.03