Table 3.

Adjusted death rates among patients treated with prophylactic stabilization versus fracture fixation^*

Variable	p value	OR (95% CI)
Age per year	0.10	1.006 (0.999–1.014)
Sex, female v. male	0.049	1.242 (1.001–1.541)
Primary cancer type
Lung v. other	< 0.001	2.139 (1.702–2.687)
Breast v. other	0.85	0.974 (0.743–1.277)
Kidney v. other	0.84	0.959 (0.647–1.422)
Prostate v. other	0.08	0.685 (0.447–1.050)
Type of surgery
Fracture fixation v. prophylactic	< 0.001	1.478 (1.225–1.785)

CI = confidence interval; OR = odds ratio.

^*We computed the risk of death given the presence of each variable using Cox regression. We adjusted each variable for the presence of all others. Cox regression is appropriate for evaluating and adjusting for the effect of multiple factors (analogous to multiple regressions) when the outcome involves censored data such as survival.