Table 2.

Serum EA-IgA and VCA-IgA expression level in nasopharyngeal carcinoma patients at different stages.

Clinical stage	EA-IgA (U·mL−1)	R	VCA-IgA (U·mL−1)	R
Stage I	22.31±4.7*	0.986	34.35±4.7*	0.949
Stage II	37.24±3.6*	0.924	46.27±3.6*	0.902
Stage III	45.17±4.3*	0.882	57.25±4.3*	0.875
Stage IV	63.37±4.2*	0.807	78.46±4.2*	0.823

^*P<0.05 for correlation analysis.