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Odds ratio of pancreatic cancer patients stratified by ABO group in relation to the ABO groups of regional unique blood donors
| Blood group | Unique blood donors, n (%) | Pancreatic cancer patients, n (%) | Odds ratio vs other blood groups |
| Group A | 277 133 (39.10) | 131 (47.63) | 1.43 (0.004) |
| Group B | 87 252 (12.31) | 38 (13.87) | 1.15 (0.41) |
| Group AB | 32 662 (4.61) | 17 (6.20) | 1.37 (0.19) |
| Group O | 311 795 (43.99) | 88 (32.12) | 0.60 (0.000070) |
| Total | 708 842 | 274 | P trend patients vs donors = 0.001 |
