Journal
JOURNAL OF NUTRITIONAL SCIENCE
Volume 8, Issue -, Pages -Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jns.2019.20
Keywords
Dietary assessment; Online 24-h dietary recall; Doubly labelled water; Validation; Repeatability; Reliability; UK adults
Categories
Funding
- UK Medical Research Council [MC UU 12015/3, MC UU 12015/5, MC UU 12015/1, MC U105960384]
- National Institute for Health Research (NIHR) Biomedical Research Centre Cambridge: Nutrition, Diet, and Lifestyle Research Theme [IS-BRC-1215-20014]
- NIHR
- MedImmune Ltd
- Newcastle University
- MRC [MC_UU_12015/1] Funding Source: UKRI
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Online self-reported 24-h dietary recall systems promise increased feasibility of dietary assessment. Comparison against interviewer-led recalls established their convergent validity; however, reliability and criterion-validity information is lacking. The validity of energy intakes (EI) reported using Intake24, an online 24-h recall system, was assessed against concurrent measurement of total energy expenditure (TEE) using doubly labelled water in ninety-eight UK adults (40-65 years). Accuracy and precision of EI were assessed using correlation and Bland-Altman analysis. Test-retest reliability of energy and nutrient intakes was assessed using data from three further UK studies where participants (11-88 years) completed Intake24 at least four times; reliability was assessed using intra-class correlations (ICC). Compared with TEE, participants under-reported EI by 25 % (95 % limits of agreement -73 % to +68 %) in the first recall, 22 % (-61 % to +41 %) for average of first two, and 25 % (-60 % to +28 %) for first three recalls. Correlations between EI and TEE were 0 center dot 31 (first), 0 center dot 47 (first two) and 0 center dot 39 (first three recalls), respectively. ICC for a single recall was 0 center dot 35 for EI and ranged from 0 center dot 31 for Fe to 0 center dot 43 for non-milk extrinsic sugars (NMES). Considering pairs of recalls (first two v. third and fourth recalls), ICC was 0 center dot 52 for EI and ranged from 0 center dot 37 for fat to 0 center dot 63 for NMES. EI reported with Intake24 was moderately correlated with objectively measured TEE and underestimated on average to the same extent as seen with interviewer-led 24-h recalls and estimated weight food diaries. Online 24-h recall systems may offer low-cost, low-burden alternatives for collecting dietary information.
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