Table 2.

Disease-free survival analysis for ACC patients (n = 83). Clinical and pathological risk factors for local–regional recurrence or distant metastasis were analyzed using Multivariable Cox’s proportional-hazards models.

Characteristics	DFS
	Univariate		Multivariate
	HR (95% CI)	p value	HR (95% CI)	p value
Gender
Male vs female	1.72 (0.92–3.24)	0.09	1.49 (0.77–2.88)	0.293
T stage
T3–4 vs T1–2	2.64 (0.94–7.41)	0.065	4.69 (1.41–15.6)	0.012
Histological grade
G3 vs G1–2	3.92 (1.72–8.94)	*0.001	4.92 (1.86–13)	*0.001
Site
Major vs Minor	1.12 (0.56–2.22)	0.754	0.90 (0.43–1.87)	0.778
Adjuvant RT
Yes vs no	0.75 (0.35–1.63)	0.472	0.30 (0.12–0.78)	0.013

HR hazard ratio, CI confidence interval.

*n = 46.