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Table 2 Primary and secondary outcomes: complete case analysis

From: Preoperative anxiety predicted the incidence of postoperative delirium in patients undergoing total hip arthroplasty: a prospective cohort study

Primary Outcome

All enrolled patients (n = 325)

Anxiety group (n = 95)

Non-anxiety group (n = 230)

p value

Incidence of delirium, n(%)

58/325(17.8%)

24/95(25.3%)

34/230(14.8%)

0.025

Secondary Outcome

Delirium cases (n = 58)

Anxiety

(n = 24)

Non-anxiety (n = 34)

 

Duration of delirium> 2 days, n(%)

19(32.8%)

9(37.5%)

10(29.4%)

0.518

Severity of delirium13, n(%)

28(48.3%)

10(41.7%)

18(52.9%)

0.397

Patterns of delirium

0.334

 hyperactive, n(%)

16

5

11

 

 hypoactive, n(%)

32

16

16

 

 Mix, n(%)

10

3

7

 

 Age in yrs.,

mean (SD)

60.5(10.6)

60.8(11.5)

60.2(10.1)

0.834

 Male, n(%)

33(56.9%)

14(58.3%)

19(55.9%)

0.853

 BMI i n kg/m2, mean (SD)

28.0(3.7)

28.5(3.7)

27.6(3.8)

0.373

 Education, completed high school or better, n(%)

9(15.5%)

5(20.8%)

4(7.0%)

0.568

 MMSE before surgery, mean (SD)

27.5(2.0)

27.9(1.7)

27.1(2.1)

0.129

 VAS, mean (SD)

2.4(1.5)

2.1(1.2)

2.6(1.6)

0.201

 Surgery time in min, mean (SD)

81.2(31.4)

88.3(31.8)

76.3(30.6)

0.153

 LOS in days, mean (SD)

7.0(2.4)

7.8(3.0)

6.4(1.6)

0.025

  1. Abbriviations: BMI Body Mass Index, MMSE Mini-Mental State Examination, VAS Visual Analogue Scale, LOS Length of Stay, SD Standard Deviation