Table 4.

presents results from the multivariate regression, odds rations and 95% Wald confidence limits

Multivariate Regression: Rheumatoid Arthritis vs. Osteoarthritis (Reference)
Effect	Adjusted Odds Ratio	95% Confidence Limit		P-Value
Cumulative Adverse events	0.98	0.92	1.05	0.63
Mechanical Ventilation	0.91	0.70	1.19	0.49
Blood Product Transfusion	1.51	1.44	1.59	<0.001
Prolonged Hospitalization	1.10	1.05	1.15	<0.001
Increased Cost of Hospitalization	1.16	1.11	1.21	<0.001

Reference = 1 (Osteoarthritis). Cumulative adverse event occurrence is defined by occurrence of any of the following: pulmonary embolism, deep venous thrombosis, cerebrovascular event, pulmonary compromise, sepsis, cardiac adverse events including myocardial infarction, pneumonia, all other infections, acute renal failure, gastrointestinal adverse events and in-hospital mortality