title: The validation of a computer-based food record for older adults: the Novel Assessment of Nutrition and Ageing (NANA) method.
abstract: Dietary assessment in older adults can be challenging. The Novel Assessment of Nutrition and Ageing (NANA) method is a touch-screen computer-based food record that enables older adults to record their dietary intakes. The objective of the present study was to assess the relative validity of the NANA method for dietary assessment in older adults. For this purpose, three studies were conducted in which a total of ninety-four older adults (aged 65-89 years) used the NANA method of dietary assessment. On a separate occasion, participants completed a 4 d estimated food diary. Blood and 24 h urine samples were also collected from seventy-six of the volunteers for the analysis of biomarkers of nutrient intake. The results from all the three studies were combined, and nutrient intake data collected using the NANA method were compared against the 4 d estimated food diary and biomarkers of nutrient intake. Bland-Altman analysis showed a reasonable agreement between the dietary assessment methods for energy and macronutrient intake; however, there were small, but significant, differences for energy and protein intake, reflecting the tendency for the NANA method to record marginally lower energy intakes. Significant positive correlations were observed between urinary urea and dietary protein intake using both the NANA and the 4 d estimated food diary methods, and between plasma ascorbic acid and dietary vitamin C intake using the NANA method. The results demonstrate the feasibility of computer-based dietary assessment in older adults, and suggest that the NANA method is comparable to the 4 d estimated food diary, and could be used as an alternative to the food diary for the short-term assessment of an individual's dietary intake.
authors: UCD Institute of Food and Health, University College Dublin,Belfield,Dublin 4,Republic of Ireland.
authors: Claire M
authors: CM
authors: Timon
authors: Faculty of Medicine, Dentistry and Health, School of Health and Related Research, University of Sheffield,SheffieldS1 4DA,UK.
authors: Arlene J
authors: AJ
authors: Astell
authors: School of Systems Engineering, University of Reading, Whiteknights,ReadingRG6 6AY,UK.
authors: Faustina
authors: F
authors: Hwang
authors: Bath Institute of Medical Engineering, Wolfson Centre, Royal United Hospital,BathBA1 3NG,UK.
authors: Tim D
authors: TD
authors: Adlam
authors: School of Systems Engineering, University of Reading, Whiteknights,ReadingRG6 6AY,UK.
authors: Tom
authors: T
authors: Smith
authors: Institute of Health and Wellbeing, University of Glasgow, Gartnavel Royal Hospital,GlasgowG12 0XH,UK.
authors: Lin
authors: L
authors: Maclean
authors: Human Nutrition Unit, Department of Oncology, Faculty of Medicine, Dentistry and Health, University of Sheffield,SheffieldS10 2RX,UK.
authors: Daynor
authors: D
authors: Spurr
authors: Human Nutrition Unit, Department of Oncology, Faculty of Medicine, Dentistry and Health, University of Sheffield,SheffieldS10 2RX,UK.
authors: Sarah E
authors: SE
authors: Forster
authors: Human Nutrition Unit, Department of Oncology, Faculty of Medicine, Dentistry and Health, University of Sheffield,SheffieldS10 2RX,UK.
authors: Elizabeth A
authors: EA
authors: Williams
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000097:blood / Q000652:urine; D001205:Ascorbic Acid / Q000008:administration & dosage / Q000097:blood; D015415:Biomarkers / Q000097:blood / Q000652:urine; D003201:Computers; D004032:Diet / Q000009:adverse effects*; D015930:Diet Records; D004044:Dietary Proteins / Q000008:administration & dosage; D002149:Energy Intake; D005240:Feasibility Studies; D005260:Female; D015577:Geriatric Assessment; D006801:Humans; D020407:Internet; D008297:Male; D015596:Nutrition Assessment; D009752:Nutritional Status; D015203:Reproducibility of Results; D006113:United Kingdom; D014508:Urea / Q000652:urine; D014584:User-Computer Interface
chemical_list: D015415:Biomarkers; D004044:Dietary Proteins; D014508:Urea; D001205:Ascorbic Acid
keywords: Validation