title: Development of a UK Online 24-h Dietary Assessment Tool: myfood24.
abstract: Assessment of diet in large epidemiological studies can be costly and time consuming. An automated dietary assessment system could potentially reduce researcher burden by automatically coding food records. myfood24 (Measure Your Food on One Day) an online 24-h dietary assessment tool (with the flexibility to be used for multiple 24 h-dietary recalls or as a food diary), has been developed for use in the UK population. Development of myfood24 was a multi-stage process. Focus groups conducted with three age groups, adolescents (11-18 years) (n = 28), adults (19-64 years) (n = 24) and older adults (≥ 65 years) (n = 5) informed the development of the tool, and usability testing was conducted with beta (adolescents n = 14, adults n = 8, older adults n = 1) and live (adolescents n = 70, adults n = 20, older adults n = 4) versions. Median system usability scale (SUS) scores (measured on a scale of 0-100) in adolescents and adults were marginal for the beta version (adolescents median SUS = 66, interquartile range (IQR) = 20; adults median SUS = 68, IQR = 40) and good for the live version (adolescents median SUS = 73, IQR = 22; adults median SUS = 80, IQR = 25). Myfood24 is the first online 24-h dietary recall tool for use with different age groups in the UK. Usability testing indicates that myfood24 is suitable for use in UK adolescents and adults.
authors.affiliation: Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK. m.carter@leeds.ac.uk.
authors.forename: Michelle C
authors.initials: MC
authors.lastname: Carter
authors.affiliation: Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK. ml09saa@leeds.ac.uk.|School of Food Science and Nutrition, King Abdul-Aziz University, PO Box 42807, 21551 Jeddah, Saudi Arabia. ml09saa@leeds.ac.uk.
authors.forename: Salwa A
authors.initials: SA
authors.lastname: Albar
authors.affiliation: Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK. m.morris@leeds.ac.uk.|Centre for Spatial Analysis and Policy, School of Geography, University of Leeds, Leeds LS2 9JT, UK. m.morris@leeds.ac.uk.
authors.forename: Michelle A
authors.initials: MA
authors.lastname: Morris
authors.affiliation: Global eHealth Unit, Department of Primary Care and Public Health, London School of Public Health, Imperial College London, London W6 8RP, UK. zeinab.mulla@imperial.ac.uk.
authors.forename: Umme Z
authors.initials: UZ
authors.lastname: Mulla
authors.affiliation: Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK. n.hancock@leeds.ac.uk.
authors.forename: Neil
authors.initials: N
authors.lastname: Hancock
authors.affiliation: Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK. c.e.l.evans@leeds.ac.uk.
authors.forename: Charlotte E
authors.initials: CE
authors.lastname: Evans
authors.affiliation: Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK. n.a.alwan@soton.ac.uk.|Academic Unit of Primary Care and Population Sciences, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, UK. n.a.alwan@soton.ac.uk.
authors.forename: Nisreen A
authors.initials: NA
authors.lastname: Alwan
authors.affiliation: Division of Biostatistics, Leeds Institute of Genetics, Health and Therapeutics, University of Leeds, Leeds LS2 9JT, UK. d.c.greenwood@leeds.ac.uk.
authors.forename: Darren C
authors.initials: DC
authors.lastname: Greenwood
authors.affiliation: Molecular Epidemiology Unit, Leeds Institute of Genetics, Health and Therapeutics, University of Leeds, Leeds LS2 9JT, UK. l.j.hardie@leeds.ac.uk.
authors.forename: Laura J
authors.initials: LJ
authors.lastname: Hardie
authors.affiliation: Nutrition and Dietetic Research Group, Department of Investigative Medicine, Hammersmith Hospital, Imperial College London, London W12 0NN, UK. g.frost@imperial.ac.uk.
authors.forename: Gary S
authors.initials: GS
authors.lastname: Frost
authors.affiliation: Global eHealth Unit, Department of Primary Care and Public Health, London School of Public Health, Imperial College London, London W6 8RP, UK. p.wark@imperial.ac.uk.
authors.forename: Petra A
authors.initials: PA
authors.lastname: Wark
authors.affiliation: Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK. j.e.cade@leeds.ac.uk.
authors.forename: Janet E
authors.initials: JE
authors.lastname: Cade
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D015930:Diet Records; D002149:Energy Intake; D005260:Female; D017144:Focus Groups; D006801:Humans; D020407:Internet; D008297:Male; D011939:Mental Recall; D008875:Middle Aged; D015596:Nutrition Assessment; D011795:Surveys and Questionnaires; D006113:United Kingdom; D055815:Young Adult
keywords: 24-h dietary recall; dietary assessment; nutrition assessment