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. Author manuscript; available in PMC: 2020 Dec 9.
Published in final edited form as: Head Neck. 2019 Feb 19;41(7):2167–2173. doi: 10.1002/hed.25687

TABLE 2.

Multivariate proportional hazards for overall survival

Covariate Reference Hazard ratio 95% CI P
Age 54-71 1.41 0.99-2.01 0.06
N stage 0-2 1.68 1.06-2.69 0.03
Propensity score 0.41-0.75 2.11 1.33-3.34 0.001
Treatment modality Surgery: RT 0.52 0.31-0.89 0.02