J. Med. Internet Res. - Two new meal- and web-based interactive food frequency questionnaires: validation of energy and macronutrient intake.


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CKGROUND: Meal-Q and its shorter version, MiniMeal-Q, are 2 new Web-based food frequency questionnaires. Their meal-based and interactive format was designed to promote ease of use and to minimize answering time, desirable improvements in large epidemiological studies.OBJECTIVE: We evaluated the validity of energy and macronutrient intake assessed with Meal-Q and MiniMeal-Q as well as the reproducibility of Meal-Q.METHODS: Healthy volunteers aged 20-63 years recruited from Stockholm County filled out the 174-item Meal-Q. The questionnaire was compared to 7-day weighed food records (WFR; n=163), for energy and macronutrient intake, and to doubly labeled water (DLW; n=39), for total energy expenditure. In addition, the 126-item MiniMeal-Q was evaluated in a simulated validation using truncated Meal-Q data. We also assessed the answering time and ease of use of both questionnaires.RESULTS: Bland-Altman plots showed a varying bias within the intake range for all validity comparisons. Cross-classification of quartiles placed 70%-86% in the same/adjacent quartile with WFR and 77% with DLW. Deattenuated and energy-adjusted Pearson correlation coefficients with the WFR ranged from r=0.33-0.74 for macronutrients and was r=0.18 for energy. Correlations with DLW were r=0.42 for Meal-Q and r=0.38 for MiniMeal-Q. Intraclass correlations for Meal-Q ranged from r=0.57-0.90. Median answering time was 17 minutes for Meal-Q and 7 minutes for MiniMeal-Q, and participants rated both questionnaires as easy to use.CONCLUSIONS: Meal-Q and MiniMeal-Q are easy to use and have short answering times. The ranking agreement is good for most of the nutrients for both questionnaires and Meal-Q shows fair reproducibility.

Resumo Limpo

ckground mealq shorter version minimealq new webbas food frequenc questionnair mealbas interact format design promot eas use minim answer time desir improv larg epidemiolog studiesobject evalu valid energi macronutri intak assess mealq minimealq well reproduc mealqmethod healthi volunt age year recruit stockholm counti fill item mealq questionnair compar day weigh food record wfr n energi macronutri intak doubli label water dlw n total energi expenditur addit item minimealq evalu simul valid use truncat mealq data also assess answer time eas use questionnairesresult blandaltman plot show vari bias within intak rang valid comparison crossclassif quartil place sameadjac quartil wfr dlw deattenu energyadjust pearson correl coeffici wfr rang r macronutri r energi correl dlw r mealq r minimealq intraclass correl mealq rang r median answer time minut mealq minut minimealq particip rate questionnair easi useconclus mealq minimealq easi use short answer time rank agreement good nutrient questionnair mealq show fair reproduc

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