Table 1 Overall

Age [years], mean ± std

54.39 ± 18.69

52.16 ± 18.21

71.41 ± 12.59

< 0.001^a

Sex, n (%)

m

f

238 (40.0)

357 (60.0)

221 (42.0)

305 (58.0)

17 (24.6)

52 (75.4)

0.006^b

BMI [kg/m²],

median (max; min)

26.90 (55.9;16.2)

26.90 (55.9; 16.2)

27.04 (43.3; 18.0)

0.355^c

AO/OTA, n (%)

44 A

44B

44 C

25 (4.2)

469 (78.8)

101 (17.0)

23 (4.4)

413 (78.5)

90 (17.1)

2 (2.9)

56 (81.2)

11 (15.9)

0.811^b

Type of ankle fracture,

n (%)

unimalleolar

bimalleolar

trimalleolar

277 (46.6)

110 (18.5)

208 (35.0)

257 (48.9)

92 (17.5)

177 (33.7)

20 (29.0)

18 (26.1)

31 (44.9)

0.007^b

Open fracture, n (%)

16 (2.7)

11 (2.1)

5 (7.2)

0.029^b

ASA-Score, mean ± std

1

2

3

4

117 (21.8)

312 (58.1)

105 (19.6)

3 (0.6)

115 (24.1)

279 (58.5)

80 (16.8)

3 (0.6)

2 (3.3)

33 (55.0)

25 (41.7)

0 (0.0)

< 0.001^b

External fixator, n (%)

84 (14.1)

68 (12.9)

16 (23.2)

0.021^b

Comorbidity, n (%)

Diabetes mellitus

Peripheral Artery Disease

Smoking

Arterial hypertension

Osteoporosis

Alcohol abuse

78 (13.1)

13 (2.2)

152 (25.5)

262 (44.0)

62 (10.4)

43 (7.2)

52 (9.9)

11 (2.1)

140 (26.6)

210 (39.9)

40 (7.6)

37 (7.0)

26 (37.7)

2 (2.9)

12 (17.4)

52 (75.4)

22 (31.9)

6 (8.7)

< 0.001^b

0.655^b

0.099^b

< 0.001^b

< 0.001^b

0.620^b

Time to definitive surgery [days],

median (max; min)

6 (49; 0)

6 (49; 0)

4 (26; 0)

< 0.001^c

Day of the week, n (%)

Mo

Tu

We

Th

Fr

Sa

Su

128 (21.5)

86 (14.5)

111 (18.7)

82 (13.8)

147 (24.7)

23 (3.9)

18 (3.0)

111 (21.1)

73 (13.9)

103 (19.6)

72 (13.7)

131 (24.9)

19 (3.6)

17 (3.2)

17 (24.6)

13 (18.8)

8 (11.6)

10 (14.5)

16 (23.2)

4 (5.8)

1 (1.4)

0.547^b

Time of surgery, n (%)

8 am − 4 pm

4 pm − 0 pm

0 am − 8 am

420 (70.6)

167 (28.1)

8 (1.3)

382 (72.6)

136 (25.9)

8 (1.5)

38 (55.1)

31 (44.9)

0 (0.0)

0.003^b

Duration of surgery [min],

median (max; min)

74.00 (450; 18)

71 (450; 18)

95 (196; 37)

< 0.001^c

Drain, n (%)

419 (70.4)

366 (69.6)

53 (76.8)

0.216^b

Syndesmotic screw,

n (%)

270 (45.4)

231 (43.9)

39 (56.5)

0.048^b

Revision surgery, n (%)

54 (9.1)

39 (7.4)

15 (21.7)

< 0.001^b

Time of revision surgery

Early

(< 4 postoperative weeks)

Late

(> 4 postoperative weeks)

15 (29,4)

36 (70,6)

11 (30,6)

25 (69,4)

4 (26.7)

11 (73.3)

1^b