. Author manuscript; available in PMC: 2015 May 1.

Published in final edited form as: Arthritis Care Res (Hoboken). 2015 May;67(5):718–724. doi: 10.1002/acr.22497

Table 3.

Crude and Adjusted Generalized Estimating Equation Models for the Odds of Patients Undergoing Total Joint Arthroplasty due to Rheumatoid Arthritis being Readmitted within 90 days Compared to those with Osteoarthritis, Overall and by Operative Year. Odds Ratio (OR), 95% Confidence Intervals (CI)

Models	Crude OR (95%CI)	Adjusted OR (95%CI)¹
All years	1.29 (0.93-1.79)	1.33 (0.94-1.87)
2009	0.85 (0.45-1.59)	0.89 (0.46-1.71)
2010	1.37 (0.73-2.57)	1.34 (0.69-2.61)
2011	1.63 (1.09-2.44)	1.74 (1.16-2.60)

Adjusted for age, gender, deficiency anemia, and ASA category.

OR=Odds Ratio. CI= Confidence Interval.