Table 3.

Reduced regression model using only statistically significant risk factors

Risk factor	Adjusted OR* (95% CI)	p-value
Operative duration (ref <90 mins)
90–180 mins	1.61 (0.96–2.72)	0.07
>180 mins	1.85 (1.06–3.22)	0.029
Consultant-led	0.67 (0.43–1.03)	0.07
Instrumentation	2.74 (1.71–4.39)	0.000
Dexamethasone	3.55 (2.08–6.05)	0.000
Wound leak	27.41 (16.99–44.22)	0.000

CI = confidence interval; OR = odds ratio

*Adjusted for all other risk factors by inclusion in multivariate logistic regression model