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Table 2 Association of HPV 16 or/and 18 infection with risk of EC

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)
HPV16E7 HPV18E7 n (%) n (%)
Negative Negative 138 (43.7) 52 (78.8)   1.000
Positive Negative 98 (31.0) 8 (12.1) 16.541*** 4.616 (2.099–10.151)
Negative Positive 48 (15.2) 4 (6.0) 10.063** 4.522 (1.553–13.166)
Positive Positive 32 (10.1) 2 (3.0) 7.277** 6.029 (1.395–26.057)
  1. “*”represents P < 0.05, “**”indicates P < 0.01, “***”depicts P < 0.001