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. Author manuscript; available in PMC: 2016 Sep 21.
Published in final edited form as: Surgery. 2014 Nov 11;156(6):1531–1541. doi: 10.1016/j.surg.2014.08.047

Table 4a.

Cox proportional hazard analysis of factors influencing all-cause mortality for patients with regional disease

Predictor Hazard Ratio 95% Confidence Interval
P value
Lower limit Upper limit

Treatment
    None (reference) --- --- ---
    Surgery 0.13 0.04 0.37 0.0002
    S + CRT 0.15 0.04 0.61 0.0079

Hospital type
    Private (reference) --- --- ---
    Public 6.26 1.18 33.1 0.0311
    Academic 0.99 0.41 2.41 0.9881
    HMO 0.49 0.20 1.22 0.1234

SES
    High (reference) --- --- ---
    Low 1.05 0.35 3.22 0.9259
    Middle 1.37 0.66 2.83 0.3960

Age (in 10 years) 1.32 1.03 1.71 0.0308

Sex
    Male (reference) --- --- ---
    Female 0.84 0.43 1.65 0.6169

Comorbidity (Charlson Index)
    0 (reference) --- --- ---
    >0 0.66 0.30 1.46 0.3006

Cushing's syndrome
    No (reference) --- --- ---
    Yes 5.49 2.17 13.92 0.0003