![]() ![]() 01) there were no differences in survival among groups A, O, and AB (P =.47). The group B survival curve was statistically worse than non-B groups (P ≤. None of the other blood type percentages had a statistically significant increase or decrease. ![]() The percentage of patients with group B blood declined with age (P <. Of the remaining 871 patients, ABO types were available for 772 (88.6%). In 2004, 906 patients died 35 were excluded (stillborn infants). Age was stratified by decade of death, and linear regressions were calculated by ABO percentage. To assess the observation that blood type B might be a marker for longevity, we reviewed the records and determined the ABO blood types of all patients who died in our hospital in 2004. This is not the only European study indicating lower life expectancy in Europe for blood type B: Rh negative blood has not been examined in the above study. We have no explanations for these observations, although an association between B blood type and some aging-associated degenerative disorders, such as Parkinson’s disease, has been found. Thus a conditioning effect of gender was evident for both A and AB groups. The proportion of subjects with group A blood increased with age, but again this effect was significant only in females. Group AB also had a negative correlation with age, although this was less pronounced: indeed, its effects were conditioned by gender, being significant only in females. In conclusion, our retrospective survey showed that the percentage of people with group B blood declined with age. ![]()
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