Comparison of 7-day and repeated 24-hour recall of symptoms of cystic fibrosis.
BACKGROUND
Patient reporting of symptoms in a questionnaire with a 7-day recall period is expected to differ from reporting in daily symptom diaries.


METHODS
38 patients with cystic fibrosis (CF) completed 77 week-long symptom diaries. Each diary day comprised 13 symptom items with 5-point response scales. Days 1-6 of the diary had a 24-hour recall period. Day 7 had a 7-day recall period. Concordance of 7-day recall with summary descriptors of daily reports (e.g. mean, maximum) was examined and ability of 7-day recall and mean of daily reports to discriminate between well and ill periods of health compared.


RESULTS
The average difference in scores was less than 0.25 response scale points. 7-day recall was most concordant with the mean of daily reports. Discriminant ability was comparable.


CONCLUSIONS
In this study sample, a questionnaire with 7-day recall provided information similar to a daily diary about the week-long experience of CF symptoms.
Bennett
Antonia V
AV
Health Outcomes Research Group, Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, 307 East 63rd St, 2nd Floor, New York, NY 10065, United States. bennetta@mskcc.org
Patrick
Donald L
DL
Lymp
James F
JF
Edwards
Todd C
TC
Goss
Christopher H
CH
D000293:Adolescent; D000328:Adult; D002648:Child; D002910:Chronology as Topic; D003550:Cystic Fibrosis / Q000503:physiopathology*; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D008499:Medical Records / Q000592:standards*; D011939:Mental Recall; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards*; D055815:Young Adult
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