{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T11:18:55Z","timestamp":1774351135087,"version":"3.50.1"},"reference-count":27,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2016,3,28]],"date-time":"2016-03-28T00:00:00Z","timestamp":1459123200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Transfusion"],"published-print":{"date-parts":[[2016,6]]},"abstract":"<jats:sec><jats:title>BACKGROUND<\/jats:title><jats:p>Low hemoglobin (Hb) is the most common reason for temporary blood donor deferral. However, factors that affect Hb measurement may not portray donor health but reflect external circumstances.<\/jats:p><\/jats:sec><jats:sec><jats:title>STUDY DESIGN AND METHODS<\/jats:title><jats:p>The effects of season, time of day, donor age, ABO, and D on capillary blood Hb level (cHb) and low Hb deferral were analyzed in 1,396,645 donor registrations from the years 2010 to 2014 in a national blood bank.<\/jats:p><\/jats:sec><jats:sec><jats:title>RESULTS<\/jats:title><jats:p>cHb was lower in the summer (July mean 154.1 g\/L in men, 139.6 g\/L in women) and in the evening (7 pm mean 153.8 g\/L in men, 138.9 g\/L in women) than in the winter (January mean 156.9 g\/L in men, 141.8 g\/L in women) and in the morning (11 am mean 157.2 g\/L in men, 142.8 g\/L in women; all p\u2009&lt;\u20090.0001). This affected donor deferral due to low Hb, with 7.8% donors deferred in July at 7 pm and 1.6% deferred in January at 11 am (p\u2009&lt;\u20090.0001). With age, cHb increased in women and decreased in men. The lowest cHb was observed in blood group A (mean 154.9 g\/L in men, 140.3 g\/L in women) and the highest in blood group B (mean 156.6 g\/L in men, 141.5 g\/L in women). D had no practically significant effect on cHb.<\/jats:p><\/jats:sec><jats:sec><jats:title>CONCLUSION<\/jats:title><jats:p>External factors, which do not reflect donor health, affect cHb and donor deferral due to low Hb. These factors should be considered when donor eligibility guidelines and procedures are developed.<\/jats:p><\/jats:sec>","DOI":"10.1111\/trf.13578","type":"journal-article","created":{"date-parts":[[2016,3,28]],"date-time":"2016-03-28T13:02:15Z","timestamp":1459170135000},"page":"1287-1294","source":"Crossref","is-referenced-by-count":17,"title":["Season and time of day affect capillary blood hemoglobin level and low hemoglobin deferral in blood donors: analysis in a national blood bank"],"prefix":"10.1111","volume":"56","author":[{"given":"Sari","family":"B\u00e4ckman","sequence":"first","affiliation":[{"name":"Finnish Red Cross Blood Service Helsinki Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Antti","family":"Larjo","sequence":"additional","affiliation":[{"name":"Finnish Red Cross Blood Service Helsinki Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juha","family":"Soikkeli","sequence":"additional","affiliation":[{"name":"Finnish Red Cross Blood Service Helsinki Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Johanna","family":"Castr\u00e9n","sequence":"additional","affiliation":[{"name":"Finnish Red Cross Blood Service Helsinki Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jarkko","family":"Ihalainen","sequence":"additional","affiliation":[{"name":"Finnish Red Cross Blood Service Helsinki Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martti","family":"Syrj\u00e4l\u00e4","sequence":"additional","affiliation":[{"name":"Finnish Red Cross Blood Service Helsinki Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2016,3,28]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1537-2995.2011.03353.x"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1537-2995.2010.02649.x"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1537-2995.2007.01292.x"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1537-2995.2010.02881.x"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.blre.2013.12.003"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1537-2995.2011.03401.x"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.transci.2013.09.009"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1423-0410.2010.01382.x"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/trf.12628"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1537-2995.2007.01207.x"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1111\/trf.13011"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-0029-1243617"},{"key":"e_1_2_8_14_1","unstructured":"JonesE OliphantE PetersonP et al. 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