title: A pilot study of the effects of interview content, retention interval, and grade on accuracy of dietary information from children.
abstract: OBJECTIVE
  Investigate differences in dietary recall accuracy by interview content (diet only or diet and physical activity), retention interval (same day or previous day), and grade (third or fifth).
  
  
  METHODS
  Thirty-two children observed eating school-provided meals and interviewed once each; interview content and retention interval randomly assigned. Multivariate analysis of variance on rates for omissions (foods observed but unreported) and intrusions (foods reported but unobserved); independent variables: interview content, retention interval, grade.
  
  
  RESULTS
  Accuracy differed by retention interval (P = .05; better for same day [omission rate, intrusion rate: 28%, 20%] than previous day [54%, 45%]) but not interview content (P > .48; diet only: 41%, 33%; diet and physical activity: 41%, 33%) or grade (P > .27; third: 48%, 42%; fifth: 34%, 24%).
  
  
  CONCLUSIONS
  Although the small sample limits firm conclusions, results provide evidence-based direction to enhance accuracy: specifically, to shorten the retention interval. Larger validation studies need to investigate the combined effect of interview content, retention interval, and grade on accuracy.
authors.affiliation: Institute for Families in Society, College of Social Work, University of South Carolina, Columbia, SC 29208, USA. sbaxter@mailbox.sc.edu
authors.forename: Suzanne D
authors.initials: SD
authors.lastname: Baxter
authors.forename: David B
authors.initials: DB
authors.lastname: Hitchcock
authors.forename: Caroline H
authors.initials: CH
authors.lastname: Guinn
authors.forename: Julie A
authors.initials: JA
authors.lastname: Royer
authors.forename: Dawn K
authors.initials: DK
authors.lastname: Wilson
authors.forename: Russell R
authors.initials: RR
authors.lastname: Pate
authors.forename: Kerry L
authors.initials: KL
authors.lastname: McIver
authors.forename: Marsha
authors.initials: M
authors.lastname: Dowda
mesh_terms: D000704:Analysis of Variance; D002648:Child; D004034:Diet Surveys / Q000379:methods*; D015444:Exercise; D005260:Female; D006801:Humans; D007407:Interviews as Topic / Q000379:methods*; D008297:Male; D010865:Pilot Projects; D015203:Reproducibility of Results; D012574:Schools
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