Dietary intake measurement using 7 d diet diaries in British men and women in the European Prospective Investigation into Cancer-Norfolk study: a focus on methodological issues

• Autor: Lentjes, Marleen AH ; McTaggart, Alison ; Mulligan, Angela A ; Powell, Natasha A ; Parry-Smith, David ; Luben, Robert N ; Bhaniani, Amit ; Welch, Ailsa A ; Khaw, Kay-Tee
• Assuntos: Adult ; Aged ; Body Mass Index ; Case-Control Studies ; Cohort Studies ; Databases, Factual ; Diet ; Diet Records ; Energy Intake ; England ; Female ; Humans ; Male ; Micronutrients ; Middle Aged ; Nutrition Assessment ; Overweight ; Prospective Studies ; Reproducibility of Results ; Self Report ; Sex Characteristics
• Descrição: The aim of the present study was to describe the energy, nutrient and crude v. disaggregated food intake measured using 7 d diet diaries (7dDD) for the full baseline Norfolk cohort recruited for the European Prospective Investigation into Cancer (EPIC-Norfolk) study, with emphasis on methodological issues. The first data collection took place between 1993 and 1998 in Norfolk, East Anglia (UK). Of the 30,445 men and women, aged 40-79 years, registered with a general practitioner invited to participate in the study, 25,639 came for a health examination and were asked to complete a 7dDD. Data from diaries with data recorded for at least 1 d were obtained for 99% members of the cohort; 10,354 (89·8%) of the men and 12,779 (91·5%) of the women completed the diet diaries for all 7 d. Mean energy intake (EI) was 9·44 (SD 2·22) MJ/d and 7·15 (SD 1·66) MJ/d, respectively. EI remained approximately stable across the days, but there was apparent under-reporting among the participants, especially among those with BMI >25 kg/m². Micronutrient density was higher among women than among men. In conclusion, under-reporting is an issue, but not more so than that found in national surveys. How foods were grouped (crude or disaggregated) made a difference to the estimates obtained, and comparison of intakes showed wide limits of agreement. The choice of variables influences estimates obtained from the food group data; while this may not alter the ranking of individuals within studies, this issue may be relevant when comparing absolute food intakes between studies.
  
• Editor: Cambridge University Press (CUP)
  
• Data de criação/publicação: 2014-02
  
• Idioma: Inglês