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. Author manuscript; available in PMC: 2016 Jun 2.
Published in final edited form as: J Am Coll Surg. 2012 Mar 15;214(5):788–797. doi: 10.1016/j.jamcollsurg.2012.01.045

Table 5.

Additive Regression Models of Developing a PSI during Hospitalization in Lower Extremity Bypass Procedures by Disease Indication

Procedure Indicator Model 1 Model 2 Model 3 Model 4
Claudicant 0.401
(0.35–0.46)		 0.417
(0.37–0.48)		 0.484
(0.43–0.55)		 0.490
(0.46–0.52)
Rest Pain 0.784
(0.69–0.90)		 0.766
(0.68–0.89)		 0.842
(0.74–0.96)		 0.840
(0.79–0.89)
Ulcer 1.197
(1.07–1.34)		 1.124
(1.00–1.26)		 1.063
(0.95–1.19)		 1.058
(1.00–1.12)
Gangrene 1.847
(1.66–2.06)		 1.745
(1.57–1.94)		 1.45
(1.30–1.62)		 1.433
(1.37–1.50)

Odds ratios with 95% confidence interval shown in parenthesis compare odds of developing at least one PSI.

Model 1 includes procedure indication alone; Model 2 includes Model 1 plus patient age, gender, race, and payer; Model 3 includes Model 2 plus patient comorbidities; Model 4 includes Model 3 plus hospital teaching status, urban hospital, hospital region, and hospital volume.