title: [Prevalence of vitamin D deficiency and associated factors in women and newborns in the immediate postpartum period].
abstract: OBJECTIVE
  To assess the prevalence of vitamin D deficiency and its associated factors in women and their newborns in the postpartum period.
  
  
  METHODS
  This cross-sectional study evaluated vitamin D deficiency/insufficiency in 226 women and their newborns in Viçosa (Minas Gerais, BR) between December 2011 and November 2012. Cord blood and venous maternal blood were collected to evaluate the following biochemical parameters: vitamin D, alkaline phosphatase, calcium, phosphorus and parathyroid hormone. Poisson regression analysis, with a confidence interval of 95% was applied to assess vitamin D deficiency and its associated factors. Multiple linear regression analysis was performed to identify factors associated with 25(OH)D deficiency in the newborns and women from the study. The criteria for variable inclusion in the multiple linear regression model was the association with the dependent variable in the simple linear regression analysis, considering p<0.20. Significance level was α<5%.
  
  
  RESULTS
  From 226 women included, 200 (88.5%) were 20 to 44 years old; the median age was 28 years. Deficient/insufficient levels of vitamin D were found in 192 (85%) women and in 182 (80.5%) neonates. The maternal 25(OH)D and alkaline phosphatase levels were independently associated with vitamin D deficiency in infants.
  
  
  CONCLUSIONS
  This study identified a high prevalence of vitamin D deficiency and insufficiency in women and newborns and the association between maternal nutritional status of vitamin D and their infants' vitamin D status.
authors.affiliation: Universidade Federal de Viçosa (UFV), Viçosa, MG, Brasil. Electronic address: mara.prado@ufv.br.
authors.forename: Mara Rúbia Maciel Cardoso
authors.initials: MR
authors.lastname: do Prado
authors.affiliation: Universidade Federal do Espírito Santo (UFES), Vitória, ES, Brasil.
authors.forename: Fabiana de Cássia Carvalho
authors.initials: Fde C
authors.lastname: Oliveira
authors.affiliation: Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brasil.
authors.forename: Karine Franklin
authors.initials: KF
authors.lastname: Assis
authors.affiliation: Universidade Federal de Viçosa (UFV), Viçosa, MG, Brasil.
authors.forename: Sarah Aparecida Vieira
authors.initials: SA
authors.lastname: Ribeiro
authors.affiliation: Universidade Federal de Viçosa (UFV), Viçosa, MG, Brasil.
authors.forename: Pedro Paulo
authors.initials: PP
authors.lastname: do Prado Junior
authors.affiliation: Universidade Federal de Viçosa (UFV), Viçosa, MG, Brasil.
authors.forename: Luciana Ferreira da Rocha
authors.initials: LF
authors.lastname: Sant'Ana
authors.affiliation: Universidade Federal de Viçosa (UFV), Viçosa, MG, Brasil.
authors.forename: Silvia Eloiza
authors.initials: SE
authors.lastname: Priore
authors.affiliation: Universidade Federal de Viçosa (UFV), Viçosa, MG, Brasil.
authors.forename: Sylvia do Carmo Castro
authors.initials: Sdo C
authors.lastname: Franceschini
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D005312:Fetal Blood; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D049590:Postpartum Period; D015995:Prevalence; D012307:Risk Factors; D014808:Vitamin D Deficiency / Q000097:blood / Q000453:epidemiology*; D055815:Young Adult
keywords: Deficiência de vitamina D; Mulheres; Newborns; Período pós‐parto; Postpartum period; Recém‐nascidos; Vitamin D deficiency; Women