Identification of risk factors for surgical site infection after type II and type III tibial pilon fracture surgery

Table 1 Comparison of baseline information between infected and controlled groups, n (%)

Factor	Infected group (n = 67)	Control group (n = 70)	t/χ2 value	P value
Age (yr)	52.3 ± 8.0	51.5 ± 7.3	0.612	0.542
Fracture to surgery interval (d)	13.2 ± 4.1	12.0 ± 4.8	1.570	0.119
Gender			0.821	0.365
Man	38 (56.72)	45 (64.29)
Woman	29 (43.28)	25 (35.71)
Ruedi-Allgower typing			6.295	0.012
Type II	36 (53.73)	52 (74.29)
Type III	31 (46.27)	18 (25.71)
Wound contamination			9.260	0.002
Yes	26 (38.81)	11 (15.71)
No	41 (61.19)	59 (84.29)
Surgical approach			2.603	0.107
Early open reduction	54 (80.6)	48 (68.57)
Step delay surgery	13 (19.4)	22 (31.43)
Surgical incision type			5.952	0.015
I-II	51 (76.12)	64 (91.43)
III	16 (23.88)	6 (8.57)
Antibiotics administered postoperatively			3.088	0.079
Yes	47 (70.15)	58 (82.86)
No	20 (29.85)	12 (17.14)
Diabetes			6.518	0.011
Yes	12 (17.91)	3 (4.29)
No	55 (82.09)	67 (95.71)
Hypertension			1.476	0.224
Yes	9 (13.43)	5 (7.14)
No	58 (86.57)	65 (92.86)

Table 2 Multivariate analysis

Parameter		SE	Walds	P value	OR	95%CI
Ruedi-Allgower fracture type	0.711	0.310	5.260	0.038	2.036	1.109-3.738
Wound contamination	0.824	0.257	10.280	0	2.280	1.378-3.772
Surgical incision type	0.610	0.228	7.158	0.006	1.840	1.177-2.877
Diabetes	1.162	0.496	5.488	0.034	3.196	1.209-8.450
Constant term	0.944	0.628	2.260	0.219	2.570	0.751-8.801