. Author manuscript; available in PMC: 2017 May 1.

Published in final edited form as: Surgery. 2016 Jan 28;159(5):1461–1468. doi: 10.1016/j.surg.2015.12.012

Table 3.

The impact of Hospital-SNF linkage on 30-day readmission rates for each of the surgical procedure groups following linear regression (OLS) and Instrumental Variables (IV) analysis.

Variables	OLS (P-value)	IV (P-value)	No. of observations	Avg. 30-day readmission rate
Lumbar Spine Surgery	−0.047 (0.024)	−0.185 (0.102)	22,345	11.3%
Total hip arthroplasty	−0.012 (0.156)	0.005 (0.910)	50,344	6.8%
Hip fracture repair	−0.037 (0.005)	−0.121 (0.017)	50,794	13.4%
Colectomy	−0.544(0.082)	−8.556(0.937)	742	20.8%
Coronary Artery Bypass Grafting (CABG)	−0.085 (0.019)	0.055(0.763)	13,938	20.6%