Table 3 Risk factors for revision after surgical bursectomy. Nominally scaled variables were tested for correlation using the Phi- and Cramer-V test. Categorical variables were compared using Pearson's chi-squared test

Nicotine abuse

27 (18.0%)

4 (25.0%)

23 (17.2%)

0.441

1.61

0.48–5.44

Alcohol abuse

28 (18.7%)

4 (25.0%)

24 (17.9%)

0.492

1.53

0.45–5.15

Drug abuse

14 (9.3%)

2 (12.5%)

12 (9.0%)

0.645

1.45

0.29–5.15

Medical immunosuppression

11 (7.3%)

2 (12.5%)

9 (6.7%)

0.402

1.98

0.39–10.11

Anticoagulation

21 (14.0%)

5 (31.3%)

16 (11.9%)

0.035

3.35

1.03–10.9

Antihypertensives

38 (25.3%)

9 (56.3%)

29 (21.6%)

0.003

4.66

1.6–13.57

Diabetes

13 (8.7%)

3 (18.8%)

10 (7.5%)

0.129

2.86

0.7–11.73

PAOD

3 (2.0%)

0 (0.0%)

3 (2.2%)

0.546

-

-

Arterial hypertension

41 (27.3%)

9 (56.3%)

32 (23.9%)

0.006

4.10

1.41–11.88

Malignant neoplasm

9 (6.0%)

1 (6.3%)

8 (6.0%)

0.964

1.05

0.12–8.98

Heart disease

14 (9.3%)

6 (37.5%)

8 (6.0%)

< 0.001

9.45

2.74–32.66

Hypothyroidism

12 (8.0%)

3 (18.8%)

9 (6.7%)

0.094

3.21

0.77–13.34

Two or more comorbidities

22 (14.7%)

9 (56.3%)

13 (9.7%)

< 0.001

11.97

3.82–37.47

Only one comorbidity

36 (24.0%)

0 (0.0%)

36 (26.9%)

0.0174

-

-

No comorbidities

92 (61.3%)

7 (43.8%)

85 (63.4%)

0.127

0.45

0.16–1.28