title: Comparison of 7-day and repeated 24-h recall of type 2 diabetes.
abstract: OBJECTIVE
  Patient reporting of type 2 diabetes symptoms in a questionnaire with a 7-day recall period was expected to be different from symptom reports using a 7-day diary with repeated 24-h recall based on cognitive theory of memory processes and prior literature. This study compared these two types of recall in patients diagnosed with type 2 diabetes (T2D).
  
  
  METHODS
  One hundred and forty adults with T2D completed a daily diary for 7 days containing 9 T2D-related symptom and impact items. On day 7, patients completed the same items with a 7-day recall period. We examined the concordance of 7-day recall with summary descriptors of the daily reports and compared the scores and the discriminant ability of 7-day recall and mean of daily reports.
  
  
  RESULTS
  Seven-day recall was most concordant with the mean of daily reports. The average difference in scores was small (range 0.22-0.77 on 11-point scale) and less than 0.5 standard deviations. For some items, the difference was positively associated with the variation in daily reports. The discriminant ability was comparable.
  
  
  CONCLUSIONS
  In this study population, a questionnaire with 7-day recall provided information consistent with a daily diary measure of the average week-long experience of T2D symptoms and impacts.
authors.affiliation: Health Outcomes Research Group, Memorial Sloan-Kettering Cancer Center, New York, NY, USA. bennetta@mskcc.org
authors.forename: A V
authors.initials: AV
authors.lastname: Bennett
authors.forename: D L
authors.initials: DL
authors.lastname: Patrick
authors.forename: D M
authors.initials: DM
authors.lastname: Bushnell
authors.forename: C F
authors.initials: CF
authors.lastname: Chiou
authors.forename: P
authors.initials: P
authors.lastname: Diehr
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016001:Confidence Intervals; D003430:Cross-Sectional Studies; D003924:Diabetes Mellitus, Type 2 / Q000473:pathology / Q000523:psychology*; D015930:Diet Records; D005260:Female; D006442:Glycated Hemoglobin; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D008603:Mental Health; D011939:Mental Recall; D008875:Middle Aged; D011594:Psychometrics; D013223:Statistics as Topic; D018709:Statistics, Nonparametric; D011795:Surveys and Questionnaires; D013997:Time Factors
chemical_list: D006442:Glycated Hemoglobin