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When age really mat...
When age really matters : ferritin reference intervals during infancy revisited
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- Larsson, Sara Marie (author)
- Lund University,Lunds universitet,Pediatrik, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Neonatalogi,Forskargrupper vid Lunds universitet,Paediatrics (Lund),Section V,Department of Clinical Sciences, Lund,Faculty of Medicine,Neonatology,Lund University Research Groups,Hallands sjukhus, Varberg
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- Hillarp, Andreas (author)
- Hosp Halland, Dept Clin Chem, SE-43281 Varberg, Sweden,Hallands sjukhus, Varberg
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- Hellström-Westas, Lena, 1954- (author)
- Uppsala University,Uppsala universitet,Perinatal, neonatal och barnkardiologisk forskning
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- Domellöf, Magnus, 1963- (author)
- Umeå University,Umeå universitet,Pediatrik,Umea Univ, Dept Clin Sci, Pediat, Umea, Sweden
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- Lundahl, Tom (author)
- Hosp Halland, Dept Clin Chem, SE-43281 Varberg, Sweden,Hallands sjukhus, Varberg
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- Andersson, Ola (author)
- Lund University,Lunds universitet,Neonatalogi,Forskargrupper vid Lunds universitet,Neonatology,Lund University Research Groups
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(creator_code:org_t)
- 2019-10-23
- 2019
- English.
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In: Scandinavian Journal of Clinical and Laboratory Investigation. - : Taylor & Francis. - 0036-5513 .- 1502-7686. ; 79:8, s. 590-594
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Abstract
Subject headings
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- Infants are at risk for iron deficiency. Despite research advances, assessing iron stores during infancy remains a challenge to the clinician. Ferritin is the first-choice laboratory marker for measuring iron stores but it is today still unclear how to evaluate reference intervals among infants. We have studied Swedish infants (n = 456), born at term after normal pregnancies. Ferritin was measured at birth (umbilical cord sample), 48-72 h, 4 months and 12 months. Lower and upper reference interval limits were constructed as the 2.5th and 97.5th percentiles. By a large study population, we were able to use more stringent measures to avoid interference from the acute phase response than previous reports on ferritin reference intervals. When we used mathematical transformation we furthermore avoided potential information loss in precision and confirmed earlier reports of sex differences. At the lower reference interval limits there were small differences between sexes. For the higher limits, the differences were more pronounced in the older infant. At 0-3 d of age we observed a difference between the sexes of only 5% at the upper limits. The differences peaked at 12 months, where the boys' upper 97.5th percentile was 56% compared to girls.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Pediatrik (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Pediatrics (hsv//eng)
Keyword
- Ferritin
- pediatrics
- reference intervals
- infant
- iron deficiency
- Ferritin
- pediatrics
- reference intervals
- infant
- iron deficiency
Publication and Content Type
- ref (subject category)
- art (subject category)
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