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Logo of nihpaAbout Author manuscriptsSubmit a manuscriptHHS Public Access; Author Manuscript; Accepted for publication in peer reviewed journal;
 
From:
Int J Radiat Oncol Biol Phys. Author manuscript; available in PMC 2013 April 1.
Published in final edited form as:
Int J Radiat Oncol Biol Phys. 2012 April 1; 82(5): 2111–2117.
Published online 2011 April 15. doi: 10.1016/j.ijrobp.2011.02.027

Table 2

Multivariate Cox Regression (MCR) Model using GPA Index Categories

FactorLevelRegression
Coefficient a.k.a.
Log Hazard Ratio
(Standard Error)
P-valueHazard
Ratio
(95% CI)
KPSKPS ≤ 501.00
KPS = 60−0.80 (0.37)0.02950.45 (0.22, 0.92)
KPS = 70 or 80−1.36 (0.30)<.00010.26 (0.14, 0.46)
KPS = 90 or 100−1.94 (0.31)<.00010.14 (0.08, 0.26)
Genetic1Basal1.00
SubtypeLuminal A−0.69 (0.18)0.00020.50 (0.35, 0.72)
HER2−0.96 (0.17)<.00010.38 (0.28, 0.53)
Luminal B−1.06 (0.18)<.00010.35 (0.25, 0.49)
AgeAge ≥ 601.00
Age < 60−0.26 (0.14)0.06400.77 (0.59, 1.02)
1The hazard ratio of HER2 positive and ER/PR positive to HER2 positive and ER/PR negative is 0.91 (95% CI 0.65, 1.28, p=0.6).