Table 1 Demographic, anthropometrics and comorbidity profiles of the cohort by complication status

 Female

271 (66.9%)

46 (63.0%)

12 (54.5%)

0.425

 Mean age, years (SD)

67.8 (9.4)

69.2 (9.7)

65.5 (11.9)

0.258

Primary Diagnosis:

0.289

 Osteoarthritis

390 (96.3%)

70 (95.9%)

20 (90.9%)

 Other

15 (3.7%)

3 (4.1%)

2 (9.1%)

BMI (kg/m²):

.

  < 18

0 (0.0%)

1 (1.4%)

0 (0.0%)

  ≥ 18 < 25

42 (10.4%)

9 (12.3%)

2 (9.1%)

  ≥ 25 < 30

97 (24.0%)

17 (23.3%)

4 (18.2%)

  ≥ 30 < 35

134 (33.1%)

19 (26.0%)

8 (36.4%)

  ≥ 35

132 (32.6%)

27 (37.0%)

8 (36.4%)

Smoking:

0.725

 Never smoked

305 (75.3%)

55 (75.3%)

14 (63.6%)

 Past smoker

63 (15.6%)

11 (15.1%)

5 (22.7%)

 Current smoker

37 (9.1%)

7 (9.6%)

3 (13.6%)

Co-morbidities

 Anxiety or depression

66 (16.3%)

11 (15.1%)

3 (13.6%)

0.968

 Autoimmune disease

11 (2.7%)

0 (0.0%)

2 (9.1%)

0.064

 Cardiovascular

93 (23.0%)

27 (37.0%)

6 (27.3%)

0.039

 Chronic respiratory

78 (19.3%)

13 (17.8%)

3 (13.6%)

0.868

 Cancer (current or past)

52 (12.8%)

8 (11.0%)

2 (9.1%)

0.924

 Cerebrovascular

26 (6.4%)

7 (9.6%)

4 (18.2%)

0.078

 Central nervous system (other)

10 (2.5%)

2 (2.7%)

1 (4.5%)

0.576

 Diabetes mellitus

86 (21.2%)

22 (30.1%)

7 (31.8%)

0.151

 Dementia

2 (0.5%)

2 (2.7%)

0 (0.0%)

0.165

 Gastro-intestinal or liver disease

142 (35.1%)

29 (39.7%)

6 (27.3%)

0.534

 Hypertension

271 (66.9%)

59 (80.8%)

13 (59.1%)

0.038

 Hyperlipidaemia

165 (40.7%)

30 (41.1%)

7 (31.8%)

0.702

 Renal impairment

21 (5.2%)

8 (11.0%)

3 (13.6%)

0.041

 Hypothyroidism

29 (7.2%)

5 (6.8%)

2 (9.1%)

0.821

 Venous thromboembolism (past)

19 (4.7%)

0 (0.0%)

0 (0.0%)

0.125

 Osteoporosis

17 (4.2%)

5 (6.8%)

0 (0.0%)

0.514

 Urinary incontinence

21 (5.2%)

4 (5.5%)

2 (9.1%)

0.551

 Urinary tract infection (chronic)

6 (1.5%)

1 (1.4%)

0 (0.0%)

1.000

ASA Classification:

0.370

 1

21 (5.2%)

2 (2.8%)

1 (4.5%)

 2

201 (49.9%)

28 (38.9%)

9 (40.9%)

 3

180 (44.7%)

42 (58.3%)

12 (54.5%)

 4

1 (0.2%)

0 (0.0%)

0 (0.0%)

 Missing

2 (0.5%)

1 (1.4%)

0 (0.0%)

Procedure:

0.025

 Total hip

99 (24.4%)

21 (28.8%)

11 (50.0%)

 Total knee

306 (75.6%)

52 (71.2%)

11 (50.0%)

Number of joints:

0.049

 Unilateral

11 (2.7%)

5 (6.8%)

2 (9.1%)

 Bilateral

394 (97.3%)

68 (93.2%)

20 (90.9%)

 Operation time, minutes (SD)

102.0 (24.7)

110.7 (32.5)

108.0 (30.1)

0.026

 Median length of Stay, days [range]

4.0 [1.0;13.0]

6.0 [2.0;21.0]

5.0 [2.0;14.0]

< 0.001

Length of Stay:

< 0.001

  ≤ 3 days

142 (35.1%)

10 (13.7%)

4 (18.2%)

 4 to 6

219 (54.1%)

37 (50.7%)

11 (50.0%)

 7 or more

44 (10.9%)

26 (35.6%)

7 (31.8%)

 HDU/ICU Admission

13 (3.2%)

7 (9.6%)

4 (18.2%)

0.001