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Association between ABO and Rh blood groups.
| RH | ||||
|---|---|---|---|---|
| Negative | Positive | Total | ||
| ABO Blood Group | A | 729 (9.7%) | 6777 (90.3%) | 7506 (100.0%) |
| AB | 130 (10.3%) | 1135 (89.7%) | 1265 (100.0%) | |
| B | 343 (9.7%) | 3182 (90.3%) | 3525 (100.0%) | |
| O | 775 (9.9%) | 7065 (90.1%) | 7840 (100.0%) | |
| Total | 1977 (9.8%) | 18,159 (90.2%) | 20,136 (100.0%) | |
