Table 2 Multivariate analyses of risk factors associated with SSI in elective foot and ankle surgery

Preoperative stay (increase of each day)

1.21 (1.09 to 1.30)

0.002

Allograft or bone substitute

3.76 (1.51 to 5.30)

< 0.001

ALB level < 35 g/L

2.33 (1.19 to 3.05)

0.021

NEUT > 6.3 × 10⁹/L

1.72 (1.27 to 2.12)

0.039

FBG level (increase in each unit)

1.17 (1.04 to 1.26)

< 0.001