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| Black | White | p value | |
|---|---|---|---|
|
| |||
| Total | 38,894 | 22,088 | |
|
| |||
| Female (%) | 71.4% | 56.3% | <0.001 |
|
| |||
| Mean age (yrs ±SD) | 49.4±19.4 | 62.9±19.4 | <0.001 |
|
| |||
| ABO blood types (%) | <0.001 | ||
| A | 25.2% | 38.1% | |
| B | 20.4% | 13.8% | |
| AB | 4.2% | 5.1% | |
| O | 50.2% | 43.0% | |
|
| |||
| Rh blood type (%) | <0.001 | ||
| Rh+ | 93.5% | 87.5% | |
| Rh− | 6.5% | 12.5% | |
