Research Article
Allele Frequency of ABO Blood Group Antigen and the Risk of Esophageal Cancer
Table 1
Frequency of ABO blood group and Rh antigen.
| | | | A | AB | B | O | Rh+ | Rh− |
| | All | | | | | | | | | Cases | 480 | 98 (20.4) | 58 (12.1) | 226 (47.1) | 98 (20.4) | 424 (88.3) | 56 (11.7) | | Control | 480 | 106 (22.1) | 43 (8.9) | 178 (37.1) | 153 (31.9) | 456 (95) | 24 (5) | | Male | | | | | | | | | Cases | 252 | 48 (19) | 41 (16.3) | 106 (42.1) | 57 (22.6) | 228 (90.5) | 24 (9.5) | | Control | 240 | 50 (20.9) | 22 (9.1) | 91 (37.9) | 77 (32.1) | 230 (95.8) | 10 (4.2) | | Female | | | | | | | | | Cases | 228 | 50 (21.9) | 17 (7.5) | 120 (52.6) | 41 (18) | 196 (86) | 32 (14) | | Control | 240 | 55 (22.9) | 22 (9.2) | 86 (35.8) | 77 (32.1) | 226 (94.2) | 14 (5.8) | | Site of cancer (case) | | | | | | | | | Upper | 86 | 19 (22.1) | 7 (8.1) | 38 (44.2) | 22 (25.6) | 79 (91.9) | 7 (8.1) | | Middle | 192 | 32 (16.7) | 19 (9.9) | 90 (46.9) | 51 (26.5) | 170 (88.5) | 22 (11.5) | | Lower | 202 | 47 (23.3) | 32 (15.8) | 98 (48.5) | 25 (12.4) | 175 (86.6) | 27 (13.4) |
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Values in parentheses are percentages.
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