Evaluation and Integration of Genetic Signature for Prediction Risk of Nasopharyngeal Carcinoma in Southern China

Table 1

Characteristics of participants in a study of nasopharyngeal carcinoma (NPC) in southern China.

	Phase I		Phase II
	Cases	Controls	Cases	Controls
Age (years)	(SD)	(SD)	(SD)	(SD)
Male, %	66.6 (233/350)	42.8 (265/619)	73.2 (597/816)	61.4 (1056/1721)
, %	95.4 (334/350)	44.7 (277/619)	95.8 (782/816)	42.3 (731/1721)
IgA/EA+**, %	59.5 (201/348)	2.3 (14/619)	72.4 (591/816)	2.6 (44/1721)
Total	350	619	816	1721

Age: the age at diagnosis of NPC for cases and age of enrollment for controls.
SD: standard deviation.
*Positive for IgA antibodies to Epstein-Barr virus capsid antigen.
**Positive for IgA antibodies to Epstein-Barr virus early antigen.
The cutoff value for seropositive status is 1 : 10 for IgA/VCA and 1 : 5 for IgA/EA.