Kheiri S, Alibeigi Z
Biostatistics and Epidemiology Department, Clinical Biochemistry Research Center, Shahrekord University of Medical Sciences, Shahrekord, Iran.
Research Center of Iranian Blood Transfusion Organization, Shahrekord, Iran.
Transfus Med. 2015 Aug;25(4):243-8. doi: 10.1111/tme.12177. Epub 2015 Mar 12.
Blood products have a vital role in saving many patients' lives. The aim of this study was to analyse blood donor return behaviour.
Using a cross-sectional follow-up design of 5-year duration, 864 first-time donors who had donated blood were selected using a systematic sampling. The behaviours of donors via three response variables, return to donation, frequency of return to donation and the time interval between donations, were analysed based on logistic regression, negative binomial regression and Cox's shared frailty model for recurrent events respectively.
Successful return to donation rated at 49·1% and the deferral rate was 13·3%. There was a significant reverse relationship between the frequency of return to donation and the time interval between donations. Sex, body weight and job had an effect on return to donation; weight and frequency of donation during the first year had a direct effect on the total frequency of donations. Age, weight and job had a significant effect on the time intervals between donations.
Aging decreases the chances of return to donation and increases the time interval between donations. Body weight affects the three response variables, i.e. the higher the weight, the more the chances of return to donation and the shorter the time interval between donations. There is a positive correlation between the frequency of donations in the first year and the total number of return to donations. Also, the shorter the time interval between donations is, the higher the frequency of donations.
血液制品在挽救众多患者生命方面发挥着至关重要的作用。本研究旨在分析献血者的再次献血行为。
采用为期5年的横断面随访设计，通过系统抽样选取了864名首次献血者。分别基于逻辑回归、负二项回归和Cox复发事件共享脆弱模型，分析了献血者在三个反应变量（再次献血、再次献血频率以及两次献血之间的时间间隔）方面的行为。
再次献血成功率为49.1%，延期献血率为13.3%。再次献血频率与两次献血之间的时间间隔呈显著的反向关系。性别、体重和工作对再次献血有影响；第一年的体重和献血频率对总献血频率有直接影响。年龄、体重和工作对两次献血之间的时间间隔有显著影响。
年龄增长会降低再次献血的几率，并延长两次献血之间的时间间隔。体重会影响这三个反应变量，即体重越高，再次献血的几率越高，两次献血之间的时间间隔越短。第一年的献血频率与再次献血的总数之间存在正相关。此外，两次献血之间的时间间隔越短，献血频率越高。
