Table 4.

Multivariate Cox Models for Factors Associated with Laparoscopic Colectomy

Variable	OR(95% CI)	Wald p value	Overall Wald p value
Adherence	0.68 (0.54–0.85)	0.0008	0.0008
Bowel obstruction	0.39 (0.31–0.49)	<0.0001	0.0001
Bowel Perforation	0.59 (0.40–0.88)	0.0092	0.0092
Stage			0.0279
T3	0.76 (0.62–0.93)	0.0874
T4	0.77 (0.57–1.05)	0.3671
Payment method			0.0009
Medicare/Medicaid	1.16 (0.75–1.79)	0.7024
Military	0.93 (0.60–1.44)	0.0733
Private	1.42 (0.96–2.10)	0.0005
Surgery year			<0.0001
2005	2.04 (1.28–3.25)	0.0002
2006	4.22 (2.92–6.12)	0.0972
2007	4.53 (3.22–6.38)	0.0018
2008	6.23 (4.39–8.84)	<0.0001
2009	9.16 (6.42–13.06)	<0.0001