Quality control of dietary data collection in the CARDIA study

Joan E. Hilner*, Arline McDonald, Linda Van Horn, Charlotte Bragg, Bette Caan, Martha L. Slattery, Robert Birch, Carey G. Smoak, Janet Wittes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


The Coronary Artery Risk Development in (Young) Adults (CARDIA) Study developed and implemented quality control (QC) measures to minimize misclassification associated with dietary data. Manual and automated data inspection were used to monitor quality. Of the 5111 participants who completed a dietary history, 717 914%) had dietary forms reviewed and 153 (3%) had the interview audiotaped. Results show that for the 717 forms reviewed, the overall form completion error rate was 0.22% and the "critical" error rate (i.e., those errors impacting on nutrient computations) was 0.12%. The proportion of forms free of any type of error increased over time (p<0.0001). The discrepancy rate in recording and interviewing methods as estimated from the 153 audiotaped interviews was 0.7%. Inter-interviewer differences were small as indicated by the audiotaped interviews and the proportion of error-free forms completed by interviewers. The results indicate that the dietary data collected in CARDIA were completely and accurately recorded for use in analysis.

Original languageEnglish (US)
Pages (from-to)156-169
Number of pages14
JournalControlled Clinical Trials
Issue number2
StatePublished - Apr 1992

ASJC Scopus subject areas

  • Pharmacology


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