Temporal distribution of blood donations in three Brazilian blood centers and its repercussion on the blood supply

Claudia Di Lorenzo Oliveira, Cesar de Almeida-Neto, Emily Jing Liu, Ester Cerdeira Sabino, Silvana Carneiro Leão, Paula Loureiro, David Wright, Brian Custer, Thelma Therezinha Gonçalez, Ligia Capuani, Michael Busch, Anna Bárbara de Freitas Carneiro Proietti

Research output: Contribution to journalArticlepeer-review


Background: Seasonal distribution of blood donation hinders efforts to provide a safe and adequate blood supply leading to chronic and persistent shortages. This study examined whether holidays, geographical area and donation type (community versus replacement) has any impact on the fluctuation of donations. Methods: The numbers of blood donations from 2007 through 2010 in three Brazilian Retrovirus Epidemiological Donor Study II (REDS-II) participating centers were analyzed according to the week of donation. The weeks were classified as holiday or non-holiday. To compare donations performed during holiday versus non-holiday weeks, tabulations and descriptive statistics for weekly donations by blood center were examined and time series analysis was conducted. Results: The average weekly number of donations varied according to the blood center and type of week. The average number of donations decreased significantly during Carnival and Christmas and increased during the Brazilian National Donor Week. The fluctuation was more pronounced in Recife and Belo Horizonte when compared to São Paulo and higher among community donors. Conclusion: National bank holidays affect the blood supply by reducing available blood donations. Blood banks should take into account these oscillations in order to plan local campaigns, aiming at maintaining the blood supply at acceptable levels.

Original languageEnglish (US)
Pages (from-to)246-251
Number of pages6
JournalRevista Brasileira de Hematologia e Hemoterapia
Issue number4
StatePublished - 2013
Externally publishedYes


  • Blood banks
  • Blood donors
  • Brazil
  • Holidays
  • Temporal distribution
  • Time factors

ASJC Scopus subject areas

  • Hematology


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