Table 2 Logistic regression for postoperative delirium as an independent variable

Preoperative PSQI score

1.416(1.252–1.602)

<0.001

1.477(1.264–1.727)

 <0.001

Age

1.081 (1.033–1.131)

0.001

1.065(0.993–1.143)

0.080

Albumin level

0.868(0.788–0.955)

0.004

0.871(0.758–1.001)

0.052

Hemoglobin level

0.980(0.962–0.998)

0.351

Operation type

 Total hip arthroplasty

Ref

Ref

 Bipolar hemiarthroplasty

4.487 (1.149–17.526)

0.031

2.564(0.426–15.419)

0.304

 Internal fixation

4.422 (1.225–16.044)

0.024

2.625(0.520–13.251)

0.243

Coronary heart disease

2.553 (1.183–5.516)

0.135

ASA classification

 I

Ref

Ref

 II

2.053 (0.431–9.785)

0.367

5.161(0.452–58.946)

0.187

 III

7.500 (1.400–40.178)

0.019

1.103(0.304–4.005)

0.882

Postoperative ICU admissions

6.028(2.731–13.306)

<0.001

2.801(1.004–7.811)

 0.049