Table 2.

Univariate and multivariate Cox proportional hazard analysis of risk for incisional hernia

Variable	Univariate Cox proportional hazard analysis		Multivariate Cox proportional hazard analysis
	Hazard ratio (95% confidence interval)	p	Hazard ratio (95% confidence interval)	p
Age > 60 years	2.04 (1.67–2.51)	< 0.001	1.54 (1.22–1.95)	< 0.001
BMI ≥ 30	4.07 (3.30–5.02)	< 0.001	3.58 (2.88–4.45)	< 0.001
Smoker	1.50 (1.18–1.90)	< 0.001	1.88 (1.45–2.42)	< 0.001
Diabetes	1.82 (1.30–2.56)	0.001
Kidney disease	1.71 (1.15–2.55)	0.008	1.58 (1.05–2.38)	0.029
Liver disease	1.94 (1.42–2.66)	< 0.001	1.45 (1.04–2.02)	0.030
Rheumatologic disease	1.69 (1.18–2.43)	0.004
Pulmonary disease	1.61 (1.28–2.02)	< 0.001	1.31 (1.03–1.66)	0.028
Midline incision (Reference Cohen or Pfannenstiel)	2.86 (2.30–3.56)	< 0.001	2.22 (1.73–2.84)	< 0.001