Table 3.

Multivariate analysis of factors associated with SSI after ORIF of closed tibial plateau fracture

Variables	OR	95%CI (lower limit)	95%CI (upper limit)	P
Preoperative duration	2.282	0.880	5.915	0.090
Bone grafting(yes)				0.002*
Autograft	6.380	2.155	18.886	0.001*
Allograft	3.215	1.009	10.247	0.048*
Operative duration (minutes)	3.544	0.958	13.108	0.058
Fracture type (Schartzker V–VI)	8.129	2.961	22.319	0.000*
AST (>40 U/L)	5.500	2.191	13.807	0.000*
WBC (>10*109/L)	2.498	1.025	6.092	0.044*
AG (mmol/L)				0.078
<8	1.878	0.694	5.082	0.214
>16	8.194	1.101	60.980	0.040*

Abbreviation and notes: AST aspartate aminotransferase; WBC white blood cell; AG anion gap

*Significant variables