Table 5.

Subgroup multivariate analysis stratified by American Joint Committee on Cancer stage

	Characteristics (AYA vs Older adults)	Multivariate analysis HR (95%CI)	P value
Before PSM	AJCC stage I/II	1.749 (1.352-2.263)	< 0.001
	AJCC stage III/IV	1.186 (0.997-1.410)	0.054
After PSM	AJCC stage I/II	1.891 (1.356-2.637)	< 0.001
	AJCC stage III/IV	1.192 (0.934-1.521)	0.157

Incorporating “age, sex, race, marital status, AJCC stage, grade, surgery, radiation, and chemotherapy” into Cox proportional hazard regression model, with AYA group as the reference. AJCC: American Joint Committee on Cancer; AYA: Adolescent and young adult; HR: Hazard ratio; CI: Confident interval; PSM: Propensity score matching.