Table 2.

Inter-correlations of EBV-DNA, hematologic inflammatory markers, T&N classification, and GTV

		EBV-DNA	T classificationa	N classificationa	GTV
	Median (range)	γ	γ	γ	γ
Neutrophil, %	63.1 (31.7–86.1)	0.09	0.10	−0.04	−0.07
Lymphocyte, %	28.4 (10.0–51.3)	−0.27**	0.11	0.03	−0.01
Monocyte, %	5.6 (0.8–11.7)	0.28**	0.10	0.01	0.18*
Platelet, 109/l	236 (112–498)	0.20*	0.07	0.07	0.27**
N/L ratio	2.21 (0.62–8.61)	0.14	−0.08	−0.04	−0.02
L/M ratio	5.04 (1.25–21.25)	−0.29**	−0.05	0.05	−0.17*
P/L ratio	8.43 (3.14–37.60)	0.32**	−0.01	0.01	0.18*
EBV-DNA, copies/ml	106 (0–94,920)	–	0.04	0.31**	0.39**

N/L ratio neutrophil to lymphocyte ratio, L/M ratio lymphocyte-to-monocyte ratio, P/L ratio platelet to lymphocyte ratio, EBV Epstein-Barr virus, GTV gross tumor volume

^*p < 0.01, ^** p < 0.001, γ: correlation coefficient

^aAccording to the AJCC 7th staging system