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Table 1 Analysis of the association between HPV infection and Kazakh patients with esophageal carcinoma

From: Heterozygote of TAP1 Codon637 decreases susceptibility to HPV infection but increases susceptibility to esophageal cancer among the Kazakh populations

Types Case (n = 361) Control (n = 66) χ 2 OR (95 % CI)
n (%)a n (%)a
HPV L1 204 (64.6) 12 (18.2) 47.786*** 8.196 (4.28–15.964)
HPV16E7 130(41.1) 10 (15.2) 15.881*** 3.941 (1.926–7.955)
HPV18E7 80 (25.3) 6 (9.1) 8.240** 3.390 (1.411–8.145)
HPV31E7 45(14.2) 3 (4.5) 4.671* 3.487 (1.050–11.582)
HPV45E7 23(7.3) 1 (1.5) 3.080 5.102 (0.677–38.466)
Multiple infection 56(17.7) 3 (4.5) 7.258** 4.523 (1.371–14.922)
  1. “*”represents P < 0.05, “**”indicates P < 0.01, “***”depicts P < 0.001
  2. aBecause of the multiple infection, the total HPV-positive rate was smaller than the sum of the positive rates of each subtype