Table 1 Demographic characteristics and co-morbidities of the 351 cellulitis cases

Mean (SD) age in years

62 (19.8)

68 (17.7)

61 (19.9)

N/A

0.055

Patients aged ≥65

162 (46.2)

21 (63.6)

141 (44.3)

2.20 (1.05–4.62)

0.034

Mean (SD) duration^a in days

4.5 (4.4)

3 (3.7)

4 (4.5)

N/A

0.155

Male sex

211 (60.1)

21 (63.6)

190 (59.7)

0.85 (0.40–1.79)

0.664

Wound

83 (23.6)

6 (18.2)

77 (24.2)

0.70 (0.28–1.75)

0.438

Purulent

60 (17.1)

9 (27.3)

51 (16.0)

1.96 (0.86–4.47)

0.103

Diabetes mellitus

95 (27.1)

14 (42.4)

81 (25.5)

2.16 (1.03–4.50)

0.37

Autoimmune disease

13 (3.7)

1 (3.0)

12 (3.8)

0.80 (0.10–6.33)

>0.999

Solid malignancy

55 (15.7)

9 (27.3)

46 (14.5)

2.22 (0.97–5.07)

0.54

Hematological malignancy

11 (3.1)

2 (6.1)

9 (2.8)

2.22 (0.46–10.71)

0.277

Liver cirrhosis

25 (7.1)

6 (18.2)

19 (6.0)

3.50 (1.29–9.49)

0.021

HIV infection

3 (0.9)

0 (0.0)

3 (0.9)

N/A

>0.999

Organ transplantation

2 (0.6)

1 (0.3)

1 (3.0)

9.91 (0.61–162.18)

0.179

Peripheral artery occlusive disease

10 (2.8)

1 (3.0)

9 (2.8)

1.07 (0.13–8.74)

>0.999

Coronary artery bypass graft

6 (1.7)

0 (0.0)

6 (1.9)

N/A

>0.999

Fracture

6 (1.7)

0 (0.0)

6 (1.9)

N/A

>0.999

Flap

8 (2.3)

1 (3.0)

7 (2.2)

1.39 (0.17–11.64)

0.550

Lymph node dissection

17 (4.8)

2 (6.1)

15 (4.7)

1.30 (0.29–5.97)

0.667