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在美国,由于公众缺乏对献血动机的了解以及对献血者的组织不力,同时也可能是由于对献血者反复献血的行为缺乏理解,从而给供应安全、足够的血液造成了制约。Fernandez等人在格林纳达的研究表明,献血者献血是出于一种责任感,是对压力和家庭或个人的,利益综合考虑后的行为。一项对大学生的研究表明,初次献血者在献血时的焦虑程度最高,首次献血者在献血后,其兴奋随着时间而降低。Zillmer等人发现在大学生志愿献血者中,这种情绪的变化也受献血者数量的影响。James和Matthews用生存分析法统计分析O型和Rh阴性两组献血者的献血时间间隔,发现反复献血的可能性与第一次和第二次献血
In the United States, the lack of understanding of motivation for blood donation and poor organization of blood donors may also be due to a lack of understanding of blood donors’ repeated blood donation, which restricts the supply of safe and adequate blood. Fernandez et al.’s study in Grenada shows that blood donation is based on a sense of responsibility and is a combination of stress and family or individual interests. A study of college students showed that first-time donors had the highest level of anxiety when donating blood, and the first donors’ blood donation decreased their excitement over time. Zillmer et al. Found that in college volunteer blood donors, this change in mood is also influenced by the number of blood donors. James and Matthews used a survival analysis to statistically analyze blood donation intervals between O-and Rh-negative donors and found that the likelihood of repeated blood donations was similar to that of the first and second blood donations