Radiotherapy for Oligometastases and Oligo-Recurrence of Bone in Prostate Cancer

Table 4

Univariable and multivariable analysis for the effect of radiotherapy on survival.

Factors	Univariable analysis			Multivariable analysis
	HR	95% CI	P value*	HR	95% CI	P value*
RTX (≥40 Gy versus <40 Gy)	0.231	0.067–0.798	0.021	0.630	0.098–4.285	0.637
Propensity score^†	n/d	n/d	n/d	0.300	0.024–3.763	0.351

Abbreviations. HR: hazard ratio; n/d: not done.
^*Analyses were performed using Cox proportional hazard regression.
^†Multivariable model indicates adjusted effect of RTX by applying propensity score which is a conditional probability of receiving RTX (≥40 Gy) given by other factors including age, baseline PSA, performance status, castration-resistant prostate cancer, and oligostatus.