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DO MOTHERS OVERESTIMATE BREAST FEEDING DURATION? AN EXAMPLE OF RECALL BIAS FROM A STUDY IN SOUTHERN BRAZIL

The problem of recall bias when reporting breast feeding duration is investigated. Data are presented from the follow-up of over 1,000 children from a birth cohort (1982) in southern Brazil, when they were on average 11, 23, and 47 months of age. Compared with the response given at 11 months of age,...

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Bibliographic Details
Published in:American journal of epidemiology 1990-09, Vol.132 (3), p.572-575
Main Authors: HUTTLY, SHARON R. A., BARROS, FERNANDO C., VICTORA, CESAR G., BERIA, JORGE U., VAUGHAN, J. PATRICK
Format: Article
Language:English
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Summary:The problem of recall bias when reporting breast feeding duration is investigated. Data are presented from the follow-up of over 1,000 children from a birth cohort (1982) in southern Brazil, when they were on average 11, 23, and 47 months of age. Compared with the response given at 11 months of age, 24% of mothers misclassified the duration (grouped into 3-month categories) at age 23 months and 30% at age 47 months. Women who were richer and/or better educated were significantly more likely to report longer durations, while those poorer and less educated did not tend to misclassify more in one direction than in the other.
ISSN:0002-9262
1476-6256
DOI:10.1093/oxfordjournals.aje.a115693