Repeated Blood Donation Research Articles

A Prospective Study of Adverse Events in Whole Blood and Apheresis Donors at a Tertiary Care Hospital in Western India

ABSTRACT Background and Objectives: Blood donation is a relatively safe procedure without any discomfort; however, if any unexpected or undesirable effects, i.e., an adverse donor reaction (ADR) does occur, it should be managed promptly and efficiently. The main aim of this study was to analyze the incidence of ADRs among blood donors. Methods: A prospective study was conducted from September 2020 to September 2022 at blood center. All ADRs in whole blood and apheresis donors were managed as per standard operating procedures. An ADR pro forma was filled, and the donor was given postdonation advice as per standard guidelines. The data collected were analyzed to find the incidence, risk factors, and causes of ADRs and to study its effect on repeat donation. Results: Among 83231 blood donations during the study period, ADRs were observed in 250 donors (0.30%). ADRs were most commonly noted in the age group of 18–30 years and were higher in first-time donors (69.6%) as compared to repeat donors (30.4%). The rate of ADR was higher in females (3.11/1000) as compared to males (3.00/1000) The most common type of ADR was vasovagal type (98%) followed by hematomas (2%). Conclusion: Younger, first-time, and female donors were more prone to ADRs in the present study. Better postdonation care and regular training of staff members in counseling, early identification, and management of ADR will aid in decreasing the severity and incidence of adverse reactions which further encourages repeat blood donations.

The impact of social media intervention based on functional motivation on repeat blood donation behavior: A prospective randomized controlled trial study.

Blood plays an irreplaceable role in medical care. Low retention rate among blood donors is the major issue in China. Various functional motivations can encourage blood donors to participate in blood donation. Therefore, it is necessary to conduct research studies on re-donate behavior based on functional motivations. This study aimed to evaluate the impact of social media intervention based on functional motivation, to discover effective intervention methods to improve re-donate rate among nonregular blood donors. In 2022-2023, 726 adults aged 18-55 years were randomized into the intervention or control group. Over 6 months, the intervention group received science popularization via social media. After the follow-up period, re-donate rate and functional motivation were assessed. Statistical analyses included t-test, chi-square test, logistic regression analysis, and analysis of variance. Five hundred and sixty-eight participants completed the intervention survey. Overall, the repeat blood donation rate in the intervention group (18.1%) was significantly higher than the control group (4.2%) (p < .001). After the intervention, understanding, protection, sensation, and values motivation increased (p < .001). The changes in functional motivations vary across different age groups. In the 18-30 age group, understanding motivation increased (p < .001), while in the 31-45 and 46-55 age groups, protection motivation increased (p < .001). In the groups donating blood 3 time and 4 time, protection motivation increased (p < .05), and in the group donating blood 4 times, the values motivation increased (p < .05). Social media intervention based on functional motivation can effectively increase the re-donate rate. Understanding, protection, sensation, and values motivations can directly influence the re-donate behavior.

P‐BB‐78 | WhatsApp Intervention to Increase Repeat Blood Donation in Ghana: A Pilot Randomized Controlled Trial—BLOODSAFE Ghana Study

P‐BB‐78 | WhatsApp Intervention to Increase Repeat Blood Donation in Ghana: A Pilot Randomized Controlled Trial—BLOODSAFE Ghana Study

'Ironing out the risk': Assessing the effect of plateletpheresis donation frequency on iron stores in South-Asian male donors.

Repeated blood donation is a well-known cause of iron deficiency among donors. However, present scientific literature lacks comprehensive evidence regarding the impact of regular plateletpheresis procedures on body iron reserves. In this study, we aimed to detect and correlate iron deficiency (using iron indices) with the frequency of platelet donations. Additionally, we also analysed the correlation between other iron and haematological indices with serum ferritin to determine cost-effective parameters that may serve as an initial screening approach to determine which donors should be subjected to serum ferritin testing. A total of 180 male participants from our platelet donor registry were enrolled in this observational cross-sectional study. Enrolment questionnaires were administered to eligible donors, and biological samples were collected during plateletpheresis donation. Biological tests such as complete blood count, reticulocyte indices, iron indices, vitamin B12 and folate were performed. Donors with ≥12 donations per year showed the highest prevalence of low ferritin (serum ferritin: 15-30 ng/mL) and absent iron stores (serum ferritin <15 ng/mL) (41.3% and 26.7%, respectively). Ferritin showed a significant negative correlation with recent (r = -0.346) and lifetime donations (r = -0.196). The efficacy of other indices for identifying iron depletion was much better using a serum ferritin value <15 ng/mL. Regular plateletpheresis donations can lead to varying severities of non-anaemic iron deficiency. Blood centres must regularly monitor frequent plateletpheresis donors (especially donors with more than 11 donations in a calendar year) and ideally maintain their serum ferritin above 30 ng/mL.

The social contagion of prosocial behaviour: How neighbourhood blood donations influence individual donation behaviour.

Life-saving transfusions and numerous other medical treatments are enabled by a minority of people that donate blood. But why do some people repeatedly engage in such prosocial behaviour, especially when it is costly to themselves? This study examines to what extent social contagion within neighbourhoods - changing behaviour in response to the behaviour of others - affects repeated blood donation behaviour. We draw on longitudinal survey and register data from a representative sample of blood donors in the Netherlands from 2007 to 2014 (N=15,090). Using a panel data model and an instrumental variable approach, we find that donors are positively affected by donations made by other donors living in their neighbourhood. This effect does not seem to be mediated by normative or informational social influence. Exploratory analysis further attributes this finding to social contagion within donor couples. Our study contributes to the literature on repeated blood donation behaviour, and can inform retention strategies of blood banks.

Gauging Incentive Values and Expectations (G.I.V.E.) among Blood Donors for Nonmonetary Incentives: Developing a Preference Elicitation Instrument through Qualitative Approaches in Shandong, China.

Blood donation rates remain suboptimal in China necessitating the reform of the current nonmonetary incentive system to motivate donors. This study aims to identify relevant attributes and levels for nonmonetary incentives in repeated blood donation and provide insights for the development of preference elicitation instruments. A qualitative research process was employed, including a literature review, in-depth interviews, attribute ranking, focus group discussions, and cognitive interviews, to identify potential nonmonetary incentives for blood donation. The identified attributes were then incorporated into a discrete choice experiment (DCE) study design. The comprehensibility and acceptability of the DCE questionnaire were assessed through cognitive interviews and a pilot study. Five nonmonetary incentive attributes were identified, including health examination, designated blood recipient, honor for donation, travel time, and gifts. The designated recipient of blood donation emerged as the most important motivator for future donations among the participants. The cognitive interviews and pilot study provided valuable feedback for refining the DCE questionnaire and ensuring its reliability. This study contributes to the understanding of nonmonetary incentives for blood donation and highlights the importance of designated blood recipients, health examination, honor for donation, travel time, and gifts as potential motivators. Moreover, it emphasizes the value of employing cognitive interviews and pilot studies in the development and refinement of DCE questionnaires, ultimately enhancing the reliability and validity of preference elicitation instruments.

A Gift of Blood: Opinions and Experience of Voluntary Blood Donors on Repeat Blood Donation

Donating blood is an essential practice that can help save lives. Effective strategies are necessary to attract and keep blood donors to meet the demand for safe blood. To evaluate the experience of voluntary blood donors in Zanzibar, a survey was conducted, and purposive sampling was used to select participants who had donated blood multiple times. The study involved interviewing 15 repeat blood donors, and the data collected was analyzed thematically. Two main themes emerged from the analysis: motivators and barriers. Despite a few negative effects, most participants had positive experiences with repeat blood donation, and only few experienced physical reactions during or after the process. The study concludes that blood donors in Zanzibar generally have good experience towards repeat blood donation, although community participation, education, and sensitization are needed to recruit and maintain more donors.

Optimizing the viability, stability, and potency of Buffy coat isolated T cells for homologous dendritic cell co-cultures: A method for handling and preservation

The utilization of T cells is becoming increasingly prominent in both clinical and research domains. However, the need to optimize preservation methodologies for extended periods of time remains unmet. To address this issue, we have developed a protocol for the handling and preservation of T cells that facilitates successful donor homologous co-cultures with dendritic cells (DCs), and preserves the cells for subsequent testing. Our method enhances experimental efficiency by reducing time and effort, and simplifying the use of T cells in mono or co-cultures. Our T cell handling and preservation methodology demonstrates the stability and viability of these cells in co-cultures, with viability exceeding 93% before and after liquid nitrogen preservation. Additionally, the preserved cells display no unspecific activation, as evidenced by the unaltered expression of the T cell activation marker CD25. The proliferation profile of preserved T cells used in DC-T cell co-cultures, stimulated by lipopolysaccharide (LPS)-activated DCs, attests to the potency and ability of these cells to interact and proliferate. These findings underscore the efficacy of our handling and preservation methodology in maintaining T cell viability and stability. Preserving donor T cells not only reduces the inconvenience of repeated blood donations but also enhances accessibility to a particular population of T cells for experimental or clinical applications, such as chimeric antigen receptor T cells.

Adverse Reactions and Complication in Voluntary Blood Donors.

Blood transfusion is a process by which blood replacement is performed in the treatment of various diseases with disorders of the number or function of blood cells or after bleeding. Blood helps save human lives and treat various diseases. Blood and blood products for the treatment of patients are prepared from the blood of voluntary donors. The aim of this sudy was to examine the frequency of adverse reactions in voluntary blood donors at the Polyclinic for Transfusion at the University Clinical Center Tuzla in the period 01.01.-31.12.2021. and, also, to determining the frequency, is to determine the severity of adverse reactions and the causes that led to them (gender, age, place of donation, whether they are more common during the first or repeated blood donation) as well as the consequences they leave behind. Our research includes voluntary blood donors who, in the period from 01.01.2021 until 31.12.2021., donated blood at the Polyclinic for Transfusion at the University Clinical Center Tuzla (UCC Tuzla). All donors have been selected according to earlier set criteria, according to the recommendations of the World Health Organization and the Council of Europe (12,13), involving age (≥18 years), weight (≥55kg), hemoglobin level (≥125g/dl for women, ≥135g/dl for men), hematocrit level (≥38% for women, ≥41g/dl for men), pulse (50-100 /min) and blood pressure (120/80-160/100mmHg). Each donor voluntarily filled out a uniformed questionary that involved data about personal and family history, as well as prior blood donations. In the Polyclinic for Transfusion UCC Tuzla, a study was conducted about adverse reactions among voluntary blood donors. During 2021 there were 14191 blood donors. From that number of donors, there were 75,4% (107000) fitting donors, while those who have been returned because they haven't satisfied donating criteria were 24,6% (3487). From the number of those who have donated blood (10700), negative reactions appeared in 1,8% (195) blood donors. Figure 1 shows adverse reactions in relation to the number of blood donations and gender. When it comes to gender, adverse reactions were recorded in 75,9% (148) male donors and 24,1% (47) female donors concering the total number of donors with adverse reactions. Our research showed that the prevalence of adverse reactions in voluntary blood donors is relatively low (1.8%). The adverse reactions are the result of vasovagal reactions, and most often occur in younger people (18 to 30 years old) in 55.9% of donors. Considering the low percentage of adverse reactions in relation to the total number of blood donors, and that they are mostly mild in intensity, it can be concluded that donating blood is safe process, and doesn't leave lasting consequences for the blood donor's health, and every donor returns to daily activities very quickly.

Adverse Reactions and Complication in Voluntary Blood Donors.

Blood transfusion is a process by which blood replacement is performed in the treatment of various diseases with disorders of the number or function of blood cells or after bleeding. Blood helps save human lives and treat various diseases. Blood and blood products for the treatment of patients are prepared from the blood of voluntary donors. The aim of this sudy was to examine the frequency of adverse reactions in voluntary blood donors at the Polyclinic for Transfusion at the University Clinical Center Tuzla in the period 01.01.-31.12.2021. and, also, to determining the frequency, is to determine the severity of adverse reactions and the causes that led to them (gender, age, place of donation, whether they are more common during the first or repeated blood donation) as well as the consequences they leave behind. Our research includes voluntary blood donors who, in the period from 01.01.2021 until 31.12.2021., donated blood at the Polyclinic for Transfusion at the University Clinical Center Tuzla (UCC Tuzla). All donors have been selected according to earlier set criteria, according to the recommendations of the World Health Organization and the Council of Europe (12,13), involving age (≥18 years), weight (≥55kg), hemoglobin level (≥125g/dl for women, ≥135g/dl for men), hematocrit level (≥38% for women, ≥41g/dl for men), pulse (50-100 /min) and blood pressure (120/80-160/100mmHg). Each donor voluntarily filled out a uniformed questionary that involved data about personal and family history, as well as prior blood donations. In the Polyclinic for Transfusion UCC Tuzla, a study was conducted about adverse reactions among voluntary blood donors. During 2021 there were 14191 blood donors. From that number of donors, there were 75,4% (107000) fitting donors, while those who have been returned because they haven't satisfied donating criteria were 24,6% (3487). From the number of those who have donated blood (10700), negative reactions appeared in 1,8% (195) blood donors. Figure 1 shows adverse reactions in relation to the number of blood donations and gender. When it comes to gender, adverse reactions were recorded in 75,9% (148) male donors and 24,1% (47) female donors concering the total number of donors with adverse reactions. Our research showed that the prevalence of adverse reactions in voluntary blood donors is relatively low (1.8%). The adverse reactions are the result of vasovagal reactions, and most often occur in younger people (18 to 30 years old) in 55.9% of donors. Considering the low percentage of adverse reactions in relation to the total number of blood donors, and that they are mostly mild in intensity, it can be concluded that donating blood is safe process, and doesn't leave lasting consequences for the blood donor's health, and every donor returns to daily activities very quickly.

Prevalence of Treponema Pallidum Antibody among Volunteer Blood Donors in China.

Background Infection with syphilis is still a major public health problem. The precise data for syphilis seroprevalence in the populations will help to develop a strategy for prevention and treatment of it. However, the data for syphilis prevalence in continuous years among volunteer blood donors in China is rare. Methods A retrospective study for Treponema pallidum (TP) antibody in blood donors was conducted from January 2010 to December 2019 at the Blood Center of Zhejiang Province, China. TP antibody was detected with two different reagents using enzyme-linked immunosorbent assay and the only sample which was reactive in the two reagents was defined as seropositive. Results A total of 992,646 volunteer blood donors were analyzed and the positive rate of TP antibody in the blood donors was 0.43%. From 2010 to 2019, the positive rates of TP antibody were 0.53%, 0.51%, 0.51%, 0.43%, 0.36%, 0.18%, 0.11%, 0.12%, 0.11%, and 0.10%, respectively. The positive rates of TP antibody were significantly different among blood donor age group (p < 0.001), with the highest positive rate in 45–54-years-old group (0.93%). The positive rates of TP antibody in male and female blood donors were 0.44% and 0.41%, respectively. The positive rate was 0.57% among the first-time blood donors, which was significantly higher than that of the repeat blood donors (0.17%). The positive rate of TP antibody in blood donors decreased gradually with the increase of educational level. Conclusion The syphilis seroprevalence is low in the blood donors of the Hangzhou area, and the positive rate of blood donors is associated with age, educational level, and times of blood donation. Increasing the number of repeat blood donations is helpful to improve blood safety.

Factors associated with first-time and repeat blood donation: Adverse reactions and effects on donor behavior.

Blood centers have a dual mission to protect donors and patients; donor safety is paramount to maintaining an adequate blood supply. Elucidating donor factors associated with adverse reactions (AR) is critical to this mission. A retrospective cohort analysis of whole blood donors from 2003 to 2020 was conducted at a single blood center in northern California. Adjusted odds ratios (AORs) with 95% CIs for ARs were estimated via multivariable logistic regression on demographics, donation history, and physical examination data. Where appropriate, Wilcoxon-Rank Sum and chi-squared tests were used to determine significance. First-time blood donors (FTD) exhibited a higher AR rate than repeat donors (4.4% vs. 1.9% p< .0001). When compared with FTDs without AR, FTDs with ARs (FT-AR) were less likely to return (30.0% vs. 47.3%, p< .0001), and, of those who returned, had a higher rate of reaction 20.2% versus 2.8% (p< .001). Factors found to be associated with FT-AR (younger age, increased heart rate, and higher diastolic blood pressure) still correlated positively with AR on return donation, but to a lower degree. FTD who potentially witnessed an AR had a lower return rate (44.6% vs. 47.3%, p= <.001) and donated fewer units (2.38 vs. 3.37, p< .001) when compared to FTD who did not witness an AR. The AR on FTD increases the AR likelihood of return donation. Longitudinal analysis shows that a time-based deferral policy targeted at FT-AR young donors can reduce the number of ARs while not dramatically impacting the blood supply.

Progress in research of risk factors of iron deficiency and intervention in blood donors

Long-term repeated regular blood donation may result in the loss and deficiency of iron. Epidemiological studies have indicated that blood donation frequency, demographical characteristics, and genetic factors are associated with iron deficiency. Our review summarizes the progress in research of etiology of iron deficiency in blood donors and intervention measures to provide evidence for the health management of non-remunerated blood donors in China.

Individualized risk trajectories for iron-related adverse outcomes in repeat blood donors.

Despite a fingerstick hemoglobin requirement and 56-day minimum donation interval, repeat blood donation continues to cause and exacerbate iron deficiency. Using data from the REDS-II Donor Iron Status Evaluation study, we developed multiclass prediction models to estimate the competing risk of hemoglobin deferral and collecting blood from a donor with sufficient hemoglobin but low or absent underlying iron stores. We compared models developed with and without two biomarkers not routinely measured in most blood centers: ferritin and soluble transferrin receptor. We generated and analyzed "individual risk trajectories": estimates of how each donors' risk developed as a function of the time interval until their next donation attempt. With standard biomarkers, the top model had a multiclass area under the receiver operator characteristic curve (AUC) of 77.6% (95% CI [77.3%-77.8%]). With extra biomarkers, multiclass AUC increased to 82.8% (95% CI [82.5%-83.1%]). In the extra biomarkers model, ferritin was the single most important variable, followed by the donation interval. We identified three risk archetypes: "fast recoverers" (<10% risk of any adverse outcome on post-donation day 56), "slow recoverers" (>60% adverse outcome risk on day 56 that declines to <35% by day 250), and "chronic high-risk" (>85% risk of the adverse outcome on day 250). A longer donation interval reduced the estimated risk of iron-related adverse outcomesfor most donors, but risk remained high for some. Tailoring safeguards to individual risk estimates could reduce blood collections from donors with low or absent iron stores.

Effects of repeated blood donation on iron status of blood donors in Zimbabwe: A cross-sectional study.

IntroductionIron deficiency is a major complication of repeated blood donation. However, most of the blood screening methods employed by blood collection agents do not include iron status markers, leading to possible subclinical iron deficiency. The aim of this study was to evaluate the effects of repeated blood donation on the iron status of this vulnerable population in Zimbabwe.MethodsAll donors were categorized into groups based on number of donations made in the previous 2‐year period prior to enrolment into the study. Serum iron, total iron‐binding capacity (TIBC), and ferritin were analyzed on automated chemistry analyzers while transferrin saturation (TSAT) was calculated. The Wilcoxon rank‐sum and ANOVA tests were used to assess the variation of iron profiles by gender and frequency of donations. All data analysis was performed using Stata software v13.ResultsStudy participants included 170 repeat donors and 20 first‐time blood donors. The median (IQR) age was 23 (19‐27) years, while the majority were males 57% (n = 109/190). The overall prevalence of iron deficiency and reduced iron stores was 12.6% and 38.9%, respectively. There were statistically significant differences between males and females in all the iron status parameters (P < .05). TIBC increased with number of donations, while iron, ferritin, and TSAT decreased with increased number of donations.ConclusionA high proportion of blood donors had iron deficiency despite being eligible to donate. Repeated blood donation may lead to substantial reduction in iron stores among blood donors. Inclusion of iron biochemical markers may enhance proper screening and monitoring of blood donors in Zimbabwe to prevent development of iron deficiency anemia.

Analysis of Influencing Factors of College Students\u2019 Intention to Repeated Blood Donation Based on Structural Equation Modeling

To research the influencing factors of college students' blood donation behavior intention and propose intervention strategies to improve the repeated blood donation rate of college students. Questionnaire survey was used to research and analyze the influencing factors of behavior intention. Amos 21.0 software was used to establish structural equation modeling and perform confirmatory factor analysis. SPSS 20.0 was used for statistic. The model was proved with highly adaptability, with χ2/df = 2.956 < 3. Factors influencing college students' intention of repeat blood donation behavior can be summarized into four: attitude, external motivation, advice-taking, and perceived behavioral control. Among them, attitude and perceived behavioral control have a great direct impact on behavioral intention, while the external motivation and recommendation acceptance have an indirect impact by influencing the other two factors. In view of those evaluation items with high path coefficient in each factor, we can develop recruitment strategies to influence college students’ repeated blood donation behavior and provide scientific suggestions for improving their repeated blood donation rate.

Simple Reciprocal Fairness Message to Enhance Non-Donor's Willingness to Donate Blood.

Against a background of declining blood donor numbers, recruiting new donors is critical for the effective operations of healthcare providers. Thus, interventions are needed to recruit new blood donors. We provide initial evidence for Voluntary Reciprocal Altruism (VRA) to enhance nondonors' willingness to become blood donors. VRA interventions involve asking two questions: one on accepting a blood transfusion if needed and one on willingness to donate. As early trials often use self-reports of willingness to perform blood donation behavior, we derive a correction factor to better estimate actual behavior. Finally, we explore the effect of VRA interventions on two prosocial emotions: gratitude and guilt. Across three experiments (two in the UK and one in Australia: Total N = 1,208 nondonors) we manipulate VRA messages and explore how they affect both reported willingness to make a one-off or repeat blood donation and influence click through to blood donation, organ donation and volunteering registration sites (behavioral proxies). We report data from a longitudinal cohort (N = 809) that enables us to derive a correction for self-reported behavioral willingness. Across the three experiments, we show that exposure to a question that asks about accepting a transfusion if needed increased willingness to donate blood with some spillover to organ donor registration. We also show that gratitude has an independent effect on donation and report a behavioral correction factor of .10. Asking nondonors about accepting a transfusion if needed is likely to be an effective strategy to increase new donor numbers.

Blood Donation Practice and Associated Factors among College Students in Kolfe Keraniyo Sub City, Addis Ababa, Ethiopia

Availability of blood for transfusion is limited in Ethiopia, as is voluntary blood donation. Evidence relating to practice on blood donation among Ethiopians is also scarce. Therefore, assessing the level of blood donation practice and its determinants among students has a paramount importance in designing an effective strategy for sustaining adequate and safe blood provision. Hence, this study aimed to assess blood donation practice and associated factors among college students in Kolfe Keraniyo Sub City, Addis Ababa, Ethiopia. Methods and materials: Institution based cross-sectional study was conducted among 354 college students from August 23, 2019 to October 7, 2019. The study participants were selected by multi stage sampling technique. A pre tested self-administered structured questionnaire was used to collect data. Binary logistic regression analysis was used to identify factors associated with blood donation practice. Result: Out of 349 sampled college students 34.4% of participants had donated blood so far. The result showed that study participants aged 21-23 and 24 and above years were 2.23 and 3.38 times more likely to donate blood compared to study participants aged 18-20 years (AOR=2.23 (95% CI: 1.15, 4.33)) and (AOR=3.38 (95% CI: 1.52, 7.50)) respectively. Health science student were 3.06 times more likely to donate blood than non-health science students (AOR=3.06 (95% CI: 1.65, 5.67)). College students who were knowledgeable about blood donation were 7.99 times more likely to donate blood compared to those who were not knowledgeable (AOR=7.99 (95% CI: 3.99, 16.02)). Study participants who said the Blood Bank working hour is convenient were 2.12 times more likely to donate blood compared to those who said the working hour is not convenient (AOR=2.12 (95% CI:1.07, 4.19)). Conclusion: Blood donation practice of college students was found to be low. Age, knowledge of blood donation, department and blood bank working hour convenience were significantly associated with blood donation practice. Hence, providing repeated blood donation awareness campaigns in the colleges and ongoing educational and motivational activities to encourage voluntary blood donation by the students.

Antalya Eğitim ve Araştırma Hastanesi Transfüzyon Merkezi’ne başvuran donörlerde ABO ve Rhesus (Rh) kan grupları dağılımının araştırılması

Amaç: Bölgemizdeki ABO ve Rhesus (Rh) kan grubu dağılımını belirleyerek transfüzyon tıbbı uygulamalarımıza ve ülkemizin kan grubu veri tabanına katkı sağlamayı amaçladık. Yöntem: Antalya Eğitim ve Araştırma Hastanesi Transfüzyon Merkezi’ne 01.01.2013 ile 01.09.2019 tarihleri arasında başvuran donörlerin ABO ve Rh kan grubu bilgileri retrospektif olarak analiz edildi. Birden fazla bağışta bulunan donörlerin tek kan grubu verisi dahil edildi. Kan grupları kolon aglutinasyon yöntemi ile saptandı. Bulgular: Başvurusu kabul edilen 15.997 donörden 10.867 donörün kan grubu çalışmaya alındı. Donörler 10.335 (% 95.10) erkek ve 532 (% 4.90) kadından oluşmakta ve yaş aralığı 37.38 ± 9.52 idi. Çalışmanın sonuçlarına göre 4.676 (% 43.0) kişi A kan grubu, 3.750 (% 34.9) kişi O kan grubu, 1.695 (%15.6) kişi B kan grubu, 706 (% 6.5) kişi AB kan grubu olarak saptanırken, 9.830 kişi (% 90.5) Rh (+) ve 1.037 kişi (% 9.5) Rh (-) olarak saptandı. Sonuç: Çalışmamızın sonuçları ülkemizin ABO ve Rh kan grubu dağılımı ile uyum göstermiştir. Ülkemiz genelinde olduğu gibi A kan grubu oranı en yüksek iken onu 0, B ve AB kan grupları izlemiştir. Antalya bölgesinde ilk kez yapılan çalışmamızın sonuçlarının transfüzyon tıbbı uygulamalarımıza, ülkemizin kan grupları dağılımı veri tabanına ve bilimsel çalışmalara katkı sağlayacağı düşünülmektedir.

Analysing repeat blood donation behavior via big data

PurposeAlthough blood banks have recently started to recruit blood donors through social media platforms, including WeChat, to increase recruitment effectiveness, few researchers have studied their effects on blood donation behavior. The aim of this study is to examine the influence of using official WeChat accounts on repeat blood donation behavior.Design/methodology/approachThis paper used the backstage operation data of official WeChat accounts and blood supply chain management system data from the blood bank for the study to analyze the changes in repeat blood donation behavior. First, to analyze the changes in the average frequency of blood donation per year, average volume of single blood donation and blood eligible rate of repeat blood donors before and after following the official WeChat accounts by difference-in-differences model combined with propensity score matching (PSM-DID). Second, we examined the impact of official WeChat accounts on the proportion of repeat blood donors through survival analysis.FindingsThe results show that following WeChat accounts increases the average frequency of blood donation and blood eligible rate of repeat blood donors by 14.36% and 1.19%, respectively, and have no significant effect on the average volume of single blood donation. Further, WeChat accounts have a more significant impact on the average frequency of blood donations per year for workers, farmers, medical staff and groups with education levels of junior high school. In addition, official WeChat accounts can effectively increase the proportion of repeat donors.Originality/valueThe results provide a quantitative basis for the influence of official WeChat accounts on repeat blood donation behaviors. On the one hand, it is of great significance to guide the publicity and recruitment of unpaid blood banks. On the other hand, it provides an evidence for the promotion of official WeChat accounts.