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. Author manuscript; available in PMC: 2017 Aug 11.
Published in final edited form as: Otolaryngol Head Neck Surg. 2012 Aug 8;147(6):1083–1092. doi: 10.1177/0194599812457324

Table 8.

Model II: Cox Model for Overall Survival Including Propensity Score (n = 326)

Risk Factor Coefficient (SE) Wald χ2 Risk Ratio 95% CI for Risk Ratio P Value
Propensity score (0.1 increase) −0.12 (0.04) 7.35 0.89 0.82–0.97 .007
Academic hospital −0.46 (0.19) 5.97 0.63 0.43–0.91 .015

Abbreviations: CI, confidence interval; SE, standard error.