Tool Library Tool Information
Validation Information: 24h Recall (French adults)
Comparison between an interactive web-based self-administered 24h dietary record and an interview by a dietitian for large-scale epidemiological studies
Online self-administered data collection, by reducing the logistic burden and cost, could advantageously replace classical methods based on dietitian's interviews when assessing dietary intake in large epidemiological studies. Studies comparing such new instruments with traditional methods are necessary. Our objective was to compare one NutriNet-Santé web-based self-administered 24 h dietary record with one 24 h recall carried out by a dietitian. Subjects completed the web-based record, which was followed the next day by a dietitian conducted 24 h recall by telephone (corresponding to the same day and using the same computerised interface for data entry). The subjects were 147 volunteers aged 48-75 years (women 59.2 %). The study was conducted in February 2009 in France. Agreement was assessed by intraclass correlation coefficients (ICC) for foods and energy-adjusted Pearson's correlations for nutrients. Agreement between the two methods was high, although it may have been overestimated because the two assessments were consecutive to one another. Among consumersonly, the median of ICC for foods was 0.8 in men and 0.7 in women (range 0.5-0.9). The median of energy-adjusted Pearson's correlations for nutrients was 0.8 in both sexes (range 0.6-0.9). The mean Pearson correlation was higher in subjects ≤60 years (P= 0.02) and in those who declared being 'experienced/expert' with computers (P =0.0003), but no difference was observed according to educational level P= 0.12). The mean completion time was similar between the two methods (median for both methods: 25 min). The web-based method was preferred by 66.1% of users. Our web-based dietary assessment, permitting considerable logistic simplification and cost savings, may be highly advantageous for large population-based surveys.
Total number of nutrients validated: 27
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: 8
- Micronutrients: 19
|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 (interview by a dietitian)||Adults||Male Only||Energy (kcal)||-34.7||316||0.86 (P)||-666.1||596.7|
|Protein (g)||2.2||15||0.88 (P)||-27.3||31.7|
|Fat (g)||-5||19||0.80 (P)||-43.8||33.8|
|Saturated fat (g)||-2.2||8||0.84 (P)||-18.2||13.8|
|MUFA (g)||-2.5||9||0.73 (P)||-19.5||14.5|
|PUFA (g)||-1.1||6||0.75 (P)||-12.5||10.3|
|Carbohydrate (g)||3.3||45||0.85 (P)||-85.7||92.3|
|Fibre (g)||2.8||16||0.77 (P)||-29.6||35.2|
|Sodium (mg)||-178.9||689||0.83 (P)||-1556.6||1198.8|
|Calcium (mg)||23.1||186||0.89 (P)||-348||394.2|
|Iron (mg)||0.5||6||0.85 (P)||-10.7||11.7|
|Zinc (mg)||0.2||2||0.87 (P)||-3.7||4.1|
|Retinol (µg)||-19||1000||0.91 (P)||-1820.8||1782.8|
|Folate (µg)||8.2||97||0.88 (P)||-185||201.4|
|Vitamin B12 (µg)||-1.6||10||0.86 (P)||-21.4||18.2|
|Vitamin C (mg)||1.6||48||0.85 (P)||-93.5||96.6|
|Fruits (g)||-20||113||0.89 (ICC)||-245.2||205.2|
|Vegetables (g)||-6.2||138||0.82 (ICC)||-283.2||270.8|
|24hr Recall (interview by a dietitian)||Adults||Female Only||Energy (kcal)||5.4||311||0.85 (P)||-616.6||627.4|
|Protein (g)||1||18||0.80 (P)||-34.48||36.5|
|Fat (g)||-1.7||17||0.81 (P)||-36.6||33.2|
|Saturated fat (g)||-1.3||7||0.82 (P)||-15.5||12.9|
|MUFA (g)||-1.2||8||0.79 (P)||-17.4||15.0|
|PUFA (g)||-0.9||5||0.64 (P)||-11.2||9.4|
|Carbohydrate (g)||4.2||41||0.87 (P)||-77.2||85.6|
|Fibre (g)||1.5||14||0.92 (P)||-27.4||30.4|
|Sodium (mg)||-194||1047||0.69 (P)||-2287.5||1899.5|
|Calcium (mg)||-33.6||280||0.71 (P)||-592.8||525.6|
|Iron (mg)||1||6||0.85 (P)||-11.2||13.2|
|Zinc (mg)||0||3||0.78 (P)||-5.1||5.1|
|Retinol (µg)||-13.1||291||0.54 (P)||-594.9||568.7|
|Folate (µg)||8.9||85||0.82 (P)||-160.3||178.1|
|Vitamin B12 (µg)||0||5||0.67 (P)||-9.1||9.1|
|Vitamin C (mg)||5.5||34||0.91 (P)||-62.9||73.9|
|Fruits (g)||-17.4||96||0.89 (ICC)||-209.4||174.6|
|Vegetables (g)||-10.6||125||0.78 (ICC)||-260.3||239.1|
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.
Touvier M, Kesse-Guyot E, Mejean C, Pollet C, Malon A, Castetbon K & Hercberg S.Comparison between an interactive web-based self-administered 24h dietary record and an interview by a dietitian for large scale epidemiological studies. (2011) British Journal of Nutrition. 105 1055-1064