Table 3 Postoperative delirium at different postoperative times assessed by the CAM-ICU score among the studied groups

2 h postop:

 < 0.05¹

 No:

31 (77.5%)

38 (95%)

38 (95%)

0.01*

 < 0.05²

 Yes:

9 (22.5%)

2 (5%)

2 (5%)

 > 0.05³

1st day evening:

 < 0.05¹

 No:

32 (80%)

39 (97.5%)

38 (95%)

0.03*

 < 0.05²

 Yes:

8 (20%)

1 (2.5%)

2 (5%)

 > 0.05³

2nd day at 11 a.m.:

 < 0.05¹

 No:

33 (82.5%)

39 (97.5%)

38 (95%)

0.03*

 < 0.05²

 Yes:

7 (17.5%)

1 (2.5%)

2 (5%)

 > 0.05³

2nd day at 6 p.m.:

 < 0.05¹

 No:

34 (85%)

39 (97.5%)

39 (97.5%)

0.03*

 < 0.05²

 Yes:

6 (15%)

1 (2.5%)

1 (2.5%)

 > 0.05³

3rd day at 11 a.m.:

 < 0.05¹

 No:

34 (85%)

40 (100%)

39 (97.5%)

0.03*

 < 0.05²

 Yes:

6 (15%)

0 (0%)

1 (2.5%)

 > 0.05³

3rd day at 6 p.m.:

 < 0.05¹

 No:

36 (90%)

40 (100%)

40 (100%)

0.01*

 < 0.05²

 Yes:

4 (10%)

0 (0%)

0 (0%)

 > 0.05³