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Validation of the Portuguese self‐administered computerised 24‐hour dietary recall among second‐, third‐ and fourth‐grade children
Author(s) -
Carvalho M.A.,
Baranowski T.,
Foster E.,
Santos O.,
Cardoso B.,
Rito A.,
Pereira Miguel J.
Publication year - 2015
Publication title -
journal of human nutrition and dietetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 70
eISSN - 1365-277X
pISSN - 0952-3871
DOI - 10.1111/jhn.12280
Subject(s) - medicine , recall , limits of agreement , portuguese , serving size , demography , statistics , zoology , environmental health , mathematics , psychology , linguistics , philosophy , sociology , cognitive psychology , biology , nuclear medicine
Background Current methods for assessing children's dietary intake, such as interviewer‐administered 24‐h dietary recall (24‐h DR ), are time consuming and resource intensive. Self‐administered instruments offer a low‐cost diet assessment method for use with children. The present study assessed the validity of the Portuguese self‐administered, computerised, 24‐h DR ( PAC 24) against the observation of school lunch. Methods Forty‐one, 7–10‐year‐old children from two elementary schools, in Lisbon, were observed during school lunch followed by completion of the PAC 24 the next day. Accuracy for reporting items was measured in terms of matches, intrusions and omissions; accuracy for reporting amounts was measured in terms of arithmetic and absolute differences for matches and amounts for omissions and intrusions; and accuracy for reporting items and amounts combined was measured in terms of total inaccuracy. The ratio of the estimated weight of food consumed with the actual weight consumed was calculated along with the limits of agreement using the method of Bland and Altman. Results Comparison of PAC 24 against observations at the food level resulted in values of 67.0% for matches, 11.5% for intrusions and 21.5% for omissions. The mean for total inaccuracy was 3.44 servings. For amounts, accuracy was high for matches (−0.17 and 0.23 servings for arithmetic and absolute differences, respectively) and lower for omissions (0.61 servings) and intrusions (0.55 servings). PAC 24 was found to under‐estimate the weight of food on average by 32% of actual intake. Conclusions PAC 24 is a lower‐burden procedure for both respondents and researchers and, with slight modification, comprises a promising method for assessing diet among children.