Clinical outcomes of retrograde intra-arterial chemotherapy concurrent with radiotherapy for elderly oral squamous cell carcinoma patients aged over 80 years old

Table 4 Multivariate analysis for patient’s characteristics and treatment factors

Variables	Level	No of patients	Locoregional recurrence
			HR^b	95% CI^c	P value
ECOG-PS	0	25	1		0.044*
	≥1	6	9.954	1.058–69.672
Treatment delay^a	No	19	1		0.675
	Yes	12	1.610	0.173–15.011

*P < 0.05; ^aTreatment delay, more than 5 days; ^bhazard ratio; ^cconfidence interval

ISSN: 1748-717X