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. 2013 Nov 21;8(11):e80052. doi: 10.1371/journal.pone.0080052

Table 4. Cox proportional hazard models on disease-free survival of NPC patients.

	Multivariatedjusted HR (95% CI)^a	P-value
Age^b
>45.3 vs. <45.3	1.231 (0.598–2.531)	0.572
Gender
Male vs. Female	1.342 (0.540–3.335)	0.527
Overall Stage
3, 4 vs. 1, 2	0.938 (0.358–2.453)	0.895
EBV DNA load
High vs. low^c	1.015 (0.471–2.189)	0.968
Serum CXCL9 level
High vs. Low^c	2.972 (1.227–7.199)	0.015^†

^†

statistically significant;

^a

HR: Hazard Ratio; CI: Confidence Interval; also adjusted with sex and gender;

^b

median age (year);

^c

Cut-off value: 307 copy/mL and 290 pg/mL, respectively (median values).