Table 3.

Multivariable Cox proportional hazards regression analyses to identify the relationship between clinical features and PFS2.

Clinical features	HR a	95% CI	P value
PFS1 (1-month increments)	0.943	0.883-1.008	0.083
Progression pattern (new lesions versus enlargement of original lesions)	0.329	0.138-0.782	0.012
Local therapy (yes versus no)	0.513	0.198-1.328	0.169

^aFor categorical variables, HR < 1 favors the first category and HR > 1 favors the second category; for continuous variables, for every unit increase in the variable, there was an increase (HR > 1) or decrease (HR < 1) in the risk of death.

Abbreviations used: HR: hazards ratio; CI: confidence interval; PFS: progression-free survival