Tool Library Tool Information
Validation Information: My Meal Mate (MMM)
‘My Meal Mate’ (MMM): validation of the diet measures captured on a smartphone application to facilitate weight loss
Accurate dietary assessment is an essential foundation of research in nutritional epidemiology. Due to the weaknesses in current methodology, attention is turning to strategies that automate the dietary assessment process to improve accuracy and reduce the costs and burden to participants and researchers. 'My Meal Mate' (MMM) is a smartphone application designed to support weight loss. The present study aimed to validate the diet measures recorded on MMM against a reference measure of 24h dietary recalls. A sample of fifty volunteers recorded their food and drink intake on MMM for 7d. During this period, they were contacted twice at random to conduct 24h telephone recalls. Daily totals for energy (kJ) and macronutrients recorded on MMM were compared against the corresponding day of recall using t tests for group means and Pearson's correlations. Bland-Altman analysis was used to assess the agreement between the methods. Energy (kJ) recorded on MMM correlated well with the recalls (day 1: r 0·77 (95% CI 0·62, 0·86), day 2: r 0·85 (95% CI 0·74, 0·91)) and had a small mean difference (day 1 (MMM - recall): -68 kJ/d (95% CI -553, 418 kJ) (-16 kcal/d, 95% CI -127, 100 kcal); day 2 (MMM - recall): -441 kJ/d (95% CI -854, -29 kJ) (-105 kcal/d, 95% CI -204, -7 kcal)). Bland-Altman analysis showed wide limits of agreement between the methods: -3378 to 3243 kJ/d (-807 to 775 kcal/d) on day 1. At the individual level, the limits of agreement between MMM and the 24h recall were wide; however, at the group level, MMM appears to have potential as a dietary assessment tool.
Total number of nutrients validated: 4
Not all of the nutrients validated in the validation studies are included in the table below, as statistical data was only selected to be displayed for a number of nutrients, this included:
- Saturated Fat
- Mono-unsaturated Fat
- Poly-unsaturated Fat
- Non‐starch polysaccharides(NSP)
- Folic Acid
- Vitamin B12
- Vitamin C
- Fruit & Vegetables
- Urinary Nitrogen
To find information on the other validated nutrients please read the validation study.
- Macronutrients: 3
- Micronutrients: 0
|Comparator||Lifestage||Sex||Nutrient Measured||Mean Difference||Standard Deviation||Correlation Coefficient||Cohen's Kappa Coefficient||Percentage Agreement||Percentage Agreement Categories||Lower Limits of Agreement||Upper Limits of Agreement|
|24hr Recall||Adults||Both||Energy (kcal)||-52||323||0.68 (P)||-582||483|
|Energy (kJ)||-218||1351||0.68 (P)||-2434||2022|
|Protein (g)||-4||15||0.64 (P)||-34||26|
|Fat (g)||-3||16||0.75 (P)||-35||29|
|Carbohydrates (g)||-2||48||0.57 (P)||-98||94|
Some results have been calculated using statistical techniques based on the published data.
For further information on statistical terms click on Statistical tests used in validation studies
All correlations coefficients in the table are unadjusted unless stated otherwise. For adjusted correlation coefficients and other statistical methods used in the study e.g. paired t-tests, please read the validation articles.
- # Adjusted
- † Energy adjusted.
- ‡ For loge-transformed, energy-adjusted nutrient intakes.
- ^ Adjacent included.
- ᵟ Participants provided identical responses.
- (w) = Weighted.
Carter MC, Burley VJ, Nykjaer C, Cade JE. ‘My Meal Mate’(MMM): validation of the diet measures captured on a smartphone application to facilitate weight loss. British Journal of Nutrition. 2013 Feb 14;109(03):539-46.