Characteristics and causes of pre-donation deferrals at a Chinese blood center

The purpose of this retrospective analysis was to understand the causes and characteristics of the pre-donation deferral, so as to enhance blood safety and improve donor satisfaction.Blood transfusion is crucial in managing a variety of different medical and surgical needs. Its benefits are manifold but there are risks for the recipients. Thus some blood donors are deferred from donating when they do not meet certain criteria. An in-depth understanding of the underlying causes of donor deferral will not only improve donor selection but also ensure blood safety and avoid donor complaints.This single-center experience was carried out from 26th July 2018 to 25th July 2019 on all whole blood donors in Tianjin, China. Donors' demographics and information were retrieved; comparisons between deferral data were summarized by the Chi-square test using Statistical Product and Service Solutions (SPSS) application version 22. The difference between groups were considered statistically significant when p < 0.05.A total of 190,846 participants were included; whereby 119,951 (62.85 %) of participants were first-time blood donors. The pre-donation deferral rate was 9.26 %, and deferral was more likely seen in first-time donors, male donors, and donors of age above 35 years (p < 0.05). Overall, raised alanine aminotransferase (ALT) contributed to 48.46 % of all temporary deferrals, followed by lipaemia (20.71 %). For female donors, low hemoglobin was the leading cause of temporary deferral. Positive hepatitis B surface antigen (Hepatitis B) and syphilis were the two common causes of permanent deferrals, with incidence at 11.65 % and 3.93 %, respectively.Pre-donation deferral remains a significant problem in China and accounted for 9.26 % of participants in this study. Raised ALT and lipaemia were common temporary deferrals, especially among first-time donors, males, and older donors. Appropriate interventions should be taken to address the blood quality, improve the donor retention strategies in order to secure an adequate and safe blood supply.