Frequency of the antigens of the system rh in blood donors Rh D Negative
Frecuencia de los antígenos del sistema Rh en donantes de sangre Rh D Negativo.
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Objective. To determine the frequency of antigens of the Rh system in donors of Rh D negative blood. Materials and methods. Retrospective and descriptive study where all the records of Rh D negative blood donors from the Blood Bank of Cordoba between the years 2012-2015 were reviewed. To describe the sociodemographic characteristics of Rh D negative blood donors and to identify the frequency of phenotypes of the Rh system, absolute, relative and confidence intervals were calculated for 95% ratios to compare Rh system phenotypes according to the ABO group And sociodemographic variables, absolute, relative frequencies, 95% confidence intervals and Chi square test were calculated. p values <0.05 were considered significant and the information was stored and analyzed in SPSS version 23. Results. The phenotype found most frequently was ccee, which corresponded to 92%; the other phenotypes were found in lower percentages distributed as follows: Ccee 5.9%, ccEe 1.2%, CCee 0.3%, and CCEE 0.2%. 88% of the donations were made by male donors and the ABO blood group with the highest frequency was found to be O corresponding to 66.4%. Conclusion. Both nationally and globally, the most frequent phenotype for Rh D negative people is ccee, with a slight variation in their percentage of repetition between regions.
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