Feasibility and relative validity of a digital photo-based dietary assessment
Results from the Nutris-Phone study
Bibliographic Data
| ID | 15094974 |
|---|---|
| Authors | Nicole Prinz (0000-0002-7570-9095, Zimmer Biomet (Netherlands), corresponding author), Barbara Bohn (0000-0001-8363-943X, Zimmer Biomet (Netherlands)), Annamarie Kern (Zimmer Biomet (Netherlands)), Deborah Püngel (Zimmer Biomet (Netherlands)), Olga Pollatos (0000-0002-0512-565X, Universität Ulm), Reinhard W Holl (0000-0003-1395-4842, Zimmer Biomet (Netherlands)) |
| Year | 2018 |
| Volume | 22 |
| Issue | 7 |
| Pages | 1-8 |
| Publication date | 2018-03-06 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Public Health Nutrition (JOURNAL) |
| Journal identifiers | ISSN: 1368-9800 • E-ISSN: 1475-2727 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1017/s1368980018000344 |
| PMID | 29506585 |
| OpenAlex | W2789261988 |
| Language | EN |
| Citations received | 2 |
| References cited | 18 |
Objective For dietary assessment, mobile devices with a camera can be used as an alternative to hand-written paper records. The Nutritional Tracking Information Smartphone (Nutris-Phone) study aimed to examine relative validity and feasibility of a photo-based dietary record in everyday life. Design Parallel to the photo-based technique, a weighed record was performed. Participant satisfaction was assessed by questionnaire. A trained nutrition scientist evaluated portion sizes and nutrient content was calculated (DGExpert). Spearman correlation and Bland–Altman analyses were applied. Setting Healthy, non-pregnant volunteers (≥18 years) without intent to lose weight recruited at Ulm University, Germany. Subjects Sixty-six participants (36 % males, median age 22·0 (interquartile range 20·0–25·0) years) took pictures of foods and beverages consumed with a commercially available mobile phone. Results Significant correlation between the photo-based and weighed record was observed: energy ( r =0·991), carbohydrate ( r =0·980), fat ( r =0·972), protein ( r =0·988), fibre ( r =0·941). Bland–Altman analyses indicated comparable means and acceptable 95 % limits of agreement (energy: −345·2 to 302·9 kJ (−82·5 to 72·4 kcal); carbohydrate: −15·2 to 13·1 g; fat: −6·4 to 6·4 g; protein: −5·9 to 5·6 g; fibre: −2·7 to 2·5 g). However, with increasing intake level, underestimation by the digital method was present (except for fat, all P <0·01). Over 80 % of participants were satisfied with the photo-based record. In nearly 90 %, technical implementation was without major problems. Conclusions Compared with a weighed record, the photo-based dietary record seems to be valid, feasible and user-friendly to estimate energy, macronutrient and fibre intakes, although a systematic bias with increasing levels of intake should be kept in mind
Interquartile range · Limits of agreement · Nuclear medicine · Phone · Spearman's rank correlation coefficient · Statistics · Mathematics · Medicine · Mobile Health and mHealth Applications · Nutrition, Genetics, and Disease · Nutritional Studies and Diet · Surgery
| Citations per year | 0.29 |
|---|---|
| Citation span | 2019 - 2023 (5) |
| Highly cited | No |