. Author manuscript; available in PMC: 2017 Dec 8.

Published in final edited form as: J Geriatr Oncol. 2014 Dec 4;6(2):119–126. doi: 10.1016/j.jgo.2014.11.002

Table 5.

Multivariate Analysis of Survival in Extensive Stage Patients (N = 71)

Parameter	Hazard Ratio (95% Confidence Interval)	P value^a^,^c
PCI (versus no PCI)	0.471 (0.24–0.93)	0.0300
Age (1-year increase)	0.912 (0.82–1.02)	0.1007
Male (versus female)	1.478 (0.84–2.61)	0.1752
Performance Score		0.8472
PS 1 (versus PS 0)	0.909 (0.46–1.79)	0.7837^b
PS 2 (versus PS 0)	1.078 (0.49–2.38)	0.8525^b
Stage		0.3757
(>1 metastatic site) versus (0 or 1 metastatic site)	1.268 (0.75–2.14)	0.3744^b
Response: CR (versus no CR)	0.698 (0.34–1.44)	0.3241

Likelihood ratio P value from a Cox model, stratified by study.

Wald P values.

Significant values are in bold

CR, complete response; ESCLC, extensive small-cell lung cancer; LSCLC, limited small-cell lung cancer; PCI, prophylactic cranial irradiation.