Multivariate analysis of prognostic factors in patients with lip squamous cell carcinoma after surgery

Table 4 Impact of adjuvant radiotherapy on PFS and OS in different subgroups of postoperative LSCC patients

Subgroups	Adjuvant radiotherapy	PFS		OS
	Adjuvant radiotherapy	Chi-square	P	Chi-square	P
AJCC stages I–II & ACCI < 5 (n = 44)	No (n = 22)	0.188	0.664	0.001	0.978
AJCC stages I–II & ACCI < 5 (n = 44)	Yes (n = 22)
AJCC stages III–IV & ACCI < 5 (n = 43)	No (n = 21)	5.846	0.018*	5.598	0.016*
AJCC stages III–IV & ACCI < 5 (n = 43)	Yes (n = 22)
AJCC stages I–II & ACCI ≥ 5 (n = 23)	No (n = 10)	0.465	0.495	0.461	0.497
AJCC stages I–II & ACCI ≥ 5 (n = 23)	Yes (n = 13)
AJCC stages III–IV & ACCI ≥ 5 (n = 37)	No (n = 10)	0.878	0.349	0.114	0.735
AJCC stages III–IV & ACCI ≥ 5 (n = 37)	Yes (n = 27)

Abbreviations: ACCI age-adjusted Charlson comorbidity index, AJCC American Joint Committee on Cancer, LSCC lip squamous cell carcinoma, PFS progression-free survival, OS overall survival
*P < 0.05

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