[ABO blood groups in patients with nephropathies]

280 patients of a centre of nephrology were with regard to their distribution of ABO and rhesus blood groups compared with a control group consisting of 4,089 donors. Female patients with pyelonephritis showed with a probability of error of less than 5% more frequently the blood group A (56.7 vs 41.8%) and more infrequently the blood group 0 (20.0 vs 39.9%). The increase of frequency of female patients of the blood group B with cystic kidneys (30.0 vs 12.6%) reached the significance level of p less than 0.1.