Background and Objectives This study investigates the association of sociodemographic and attitudinal factors with blood donation frequency in Turkey that may contribute future strategies on donor recruitment. Materials and MethodsA face-to-face interview was designed including items about history of prior donations and about attitudinal factors such as personal beliefs, moral norms and personal satisfaction with donation experiences among first-time, returning and regular donors. Binary logistic regression analysis was used to estimate the effect of donor characteristics, sociodemographic and attitudinal variables.Results Totally, 7400 whole blood donors attended to the study (20% first-time, 39% returning and 41% regular donors). Most donors were men; however, women clearly more often donate for the first time and donate less regularly. Age showed a clear effect on the chance of being both of returning and regular donors. Employed returning donors were less likely to return to donation. Education status affected first-time donation negatively whereas affected regular donation positively. Level of income affected first-time donation negatively whereas affected returning to donation positively. Blood need of a family member affected on returning to donation and regular donation; however, the conditions of donation units such as ventilation or crowdedness affected on lapsing. ConclusionOur results show that age, gender, socio-economic-status and attitudinal factors were associated with being a first-time, returning or regular donor. These data provide Turkish Red Crescent with knowledge on Turkish donor population, which help to build donor recruitment and retention policies.
Aim: To investigate if there is an association between the blood groups of convalescent plasma (CP) donors and Severe acute respiratory syndrome Coronavirus-2 infection risk.Methods: Blood groups of 30605 CP donors were compared with 1316676 Turkish Red Crescent (TRC) whole blood donors. Software data of TRC for the period between 07 April 2020 and 11 December 2020 was analyzed as a retrospective cohort study.
Objective: The present study investigates the seroconversion time course of the IgG antibody against SARS-CoV-2 and ascertains whether its levels change according to the patient’s ABO blood group. Method: A total of 36,003-convalescent plasma (CP) donations of 12,315 Turkish Red Crescent CP donors were analyzed. The ABO blood group of the CP donors was determined by Gel Centrifugation; and IgG was measured using the Euroimmun anti-SARS-CoV-2 ELISA. The differences in the distributions of mean IgG ratios among the different ABO blood groups were analyzed with One-Way ANOVA and Independent Samples T-test. Results: Among the CP donors, 98.4% were male. An antibody response to SARS-CoV-2 was noted-although in a few CP donors- on the 244th day, and a significant association between the ABO blood groups and the mean IgG ratios was noted (p: 0.001). The highest (mean±SD) antibody level was observed in the AB blood group (39.5±15.7), followed by the B (37.9±11.5) and the A blood groups (36.6±10.7), while the lowest value was recorded in the O blood group (34.4±11.5). Significant differences between all paired groups were noted in pairwise comparisons. The Rh (-) blood group (37.4±13.6) had a significantly higher antibody level than the Rh (+) blood group (36.3±11.2) (p: 0.005). Conclusion: An antibody response to SARS-CoV-2 was noted in a CP donor on the 244th day. The average IgG ratios were higher in the CP donors with the AB blood group, but lower in the O blood group. These results may be considered a valuable indication of the effectiveness of CP therapy used for the treatment of COVID-19 patients with clinically relevant blood types.
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