Table 3.

Analyses of prognostic factors for DFS and DSS

Variable (reference)	DFS		DSS
	HR (95% CI)	P-valuea)	HR (95% CI)	P-valuea)
Univariate
Age (≤56 yr vs. >56 yr)	0.35 (0.13–0.90)	0.03	0.21 (0.05–0.71)	0.02
Sex (male vs. female)	0.67 (0.25–1.78)	0.43	1.00 (0.31–2.89)	0.78
Site (sinonasal vs. other)	1.14 (0.37–3.46)	0.81	2.33 (0.68–7.99)	0.17
T classification (T3 vs. T4)	6.59 (2.16–20.1)	0.001	13.2 (3.3–53.1)	<0.001
Surgical approach (endoscopic vs. external)	1.36 (0.53–3.45)	0.51	3.41 (0.9–12.6)	0.06
Clear resection margin (no vs. yes)	0.55 (0.07–4.24)	0.56	0.79 (0.10–6.32)	0.82
Treatment modality (no adjuvant vs. adjuvant)	1.96 (0.69–5.58)	0.20	7.09 (0.90–55.6)	0.06
Multivariate
Age (≤56 yr vs. >56 yr)	0.26 (0.09–0.79)	0.01	0.26 (0.09–0.89)	0.04
T classification (T3 vs. T4)	10.8 (2.7–42.7)	0.001	14.4 (2.7–42.7)	0.002
Surgical approach (endoscopic vs. external)	0.35 (0.10–1.17)	0.09	0.75 (0.16–1.17)	0.72

DFS, disease free survival; DSS, disease specific survival; HR, hazard ratio; CI, confidence interval.

^a)Cox proportional hazard model.