title: Risk of developmental delay: Comparison of late preterm and full term Canadian infants at age 12 months.
abstract: Late preterm (34(0/7) to 36(6/7)weeks gestation) infants may experience developmental delays greater than those found in term (≥ 37(0/7)weeks gestation) infants.
  
  
  
  The aim of this study was to compare the risk of developmental delay between late preterm and full-term Canadian born infants at age 12months, and to determine infant and maternal factors associated with risk of delay.
  
  
  
  A descriptive comparative study was conducted from data available from the All Our Babies community-based, prospective, pregnancy cohort in Calgary, Alberta. Participants were a sample of mothers of 52 infants born late preterm and 156 randomly selected mothers of term infants, matched for infant sex; eligible infants were singleton births. Mothers completed a developmental screening tool, the Ages and Stages Questionnaire, version 3 (ASQ-3), when their infant was age 12months. Corrected age (CA) was used for preterm infants.
  
  
  
  Both late preterm and term infants who required neonatal intensive care (NICU) were more likely to demonstrate risk of developmental delay. Compared to term infants, there was a trend for late preterm infants to be at risk of communication and gross motor delay at age 12months CA that was attenuated to the null when adjustments were made for NICU admission and other covariates.
  
  
  
  Infants born between 34 and 41weeks who are admitted to NICU are at increased risk of developmental delay. Early identification of risk provides an opportunity for referral for developmental assessment and early intervention programming.
authors.affiliation: Holland Bloorview Kids Rehabilitation Hospital, 2W305, 150 Kilgour Road, Toronto, Ontario, M4G 1R8, Canada. Electronic address: mballantyne@hollandbloorview.ca.
authors.forename: Marilyn
authors.initials: M
authors.lastname: Ballantyne
authors.affiliation: Faculty of Nursing, University of Calgary, PF2222, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, Canada; Department of Paediatrics, Cumming School of Medicine, University of Calgary, 2888 Shaganappi Trail NW, Calgary, Alberta, T2N 4N1, Canada. Electronic address: benzies@ucalgary.ca.
authors.forename: Karen M
authors.initials: KM
authors.lastname: Benzies
authors.affiliation: Alberta Health Services, Calgary Zone, 10301 Southport Lane, SW, Calgary, Alberta, T2W 1S7, Canada. Electronic address: SheilaW.McDonald@albertahealthservices.ca.
authors.forename: Sheila
authors.initials: S
authors.lastname: McDonald
authors.affiliation: Department of Occupational Therapy, 8205 - 114 Street, University of Alberta, Edmonton, Alberta, T6G 2G4, Canada. Electronic address: Joyce.Magill-Evans@ualberta.ca.
authors.forename: Joyce
authors.initials: J
authors.lastname: Magill-Evans
authors.affiliation: Department of Paediatrics, Cumming School of Medicine, University of Calgary, 2888 Shaganappi Trail NW, Calgary, Alberta, T2N 4N1, Canada; Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, 2888 Shaganappi Trail NW, Calgary, Alberta, T2N 4N1, Canada. Electronic address: Stough@ucalgary.ca.
authors.forename: Suzanne
authors.initials: S
authors.lastname: Tough
mesh_terms: D000328:Adult; D002170:Canada; D016022:Case-Control Studies; D002657:Child Development; D002658:Developmental Disabilities / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature / Q000254:growth & development*