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Table 1 Characteristics of participants in a study of nasopharyngeal carcinoma (NPC) in southern China

From: Genetic Polymorphisms of CYP2E1, GSTP1, NQO1 and MPO and the Risk of Nasopharyngeal Carcinoma in a Han Chinese Population of Southern China

 

Phase I

Phase II

 

Cases

Controls

Cases

Controls

Age (years)

45 ± 11.4 (SD)

46 ± 9.7 (SD)

45 ± 9.1 (SD)

45 ± 9.7 (SD)

Male, %

66.8 (239/358)

43.1 (271/629)

72.8 (155/213)

77.8 (179/230)

IgA+*, %

95.3 (341/358)

44.5 (280/629)

100 (213/213)

100 (230/230)

Total

358

629

213

230

  1. Age was the age at diagnosis of NPC for cases and age of enrollment for controls.
  2. SD = standard deviation.
  3. * Positive for IgA antibodies to Epstein-Barr virus capsid antigen.