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| Group | Number of subjectsa |
|---|---|
| Blood group | 249 |
| Non-O group | 166 |
| A | 81 |
| B | 69 |
| AB | 16 |
| O group | 83 |
| Gender | 121 |
| Female | 72 |
| Male | 49 |
| Age (year) | 121 |
| <40 | 25 |
| 40–49 | 73 |
| >50 | 23 |
Notes.
A total of 249 donors were included in the final analyses for the effect of ABO Blood Group; Only 121 subjects provided the information of age and gender, which could be used for the analysis of age and gender.
