1Nordic Council of Ministers (1994) Evaluering av den Svenske Kostholdsundersøkelsen Hulken – Anvendelighet i andre Nordiske Land (Evaluation of the Swedish Dietary Survey ‘Hulken’ – Suitability in other Nordic Countries). . Copenhagen: TemaNord.
2Lillegaard, IT, Loken, EB & Andersen, LF (2007) Relative validation of a pre-coded food diary among children, under-reporting varies with reporting day and time of the day. Eur J Clin Nutr 61, 61–68.
3Rebro, SM, Patterson, RE, Kristal, AR, et al. (1998) The effect of keeping food records on eating patterns. J Am Diet Assoc 98, 1163–1165.
4European Food Consumption Survey Method (EFCOSUM) Group (2001) European Food Consumption Survey Method. TNO report V3766. Zeist, The Netherlands: TNO Nutrition and Food Research.
5Fagt, S, Biltoft-Jensen, A, Matthiessen, J, et al. (2008) Danskernes Kostvaner 1995–2006. Status og Udvikling med Fokus på Frugt og Grønt samt Sukker (The Dietary Habits of Danes. Status and Trends with Focus on Fruits and Vegetables and Sugar). . Copenhagen: Technical University of Denmark, National Food Institute.
6Goldberg, GR, Black, AE, Jebb, SA, et al. (1991) Critical evaluation of energy intake data using fundamental principles of energy physiology: 1. Deviation of cut-off limits to identify under-recording. Eur J Clin Nutr 45, 569–581.
7Hustvedt, BE, Christophersen, A, Johnsen, LR, et al. (2004) Description and validation of the ActiReg: a novel instrument to measure physical activity and energy expenditure. Br J Nutr 92, 1001–1008.
8Garby, L, Garrow, JS, Jorgensen, B, et al. (1988) Relation between energy expenditure and body composition in man: specific energy expenditure in vivo of fat and fat-free tissue. Eur J Clin Nutr 42, 301–305.
9Heitmann, BL (1990) Prediction of body water and fat in adult Danes from measurement of electrical impedance. A validation study. Int J Obes 14, 789–802.
10Black, AE (2000) The sensitivity and specificity of the Goldberg cut-off for EI:BMR for identifying diet reports of poor validity. Eur J Clin Nutr 54, 395–404.
11Rasmussen, LB, Matthiessen, J, Biltoft-Jensen, A, et al. (2007) Characteristics of misreporters of dietary intake and physical activity. Public Health Nutr 10, 230–237.
12Nordic Council of Ministers (2004) Nordic Nutrition Recommendations 2004. Integrating Nutrition and Physical Activity. Nord, 4th ed.Copenhagen: Nordic Council of Ministers.
13Bland, JM & Altman, DG (1986) Statistical methods for assessing agreement between two methods of clinical measurement. Lancet i, 307–310.
14Matthiessen, J, Biltoft-Jensen, A, Rasmussen, LB, et al. (2008) Comparison of the Danish Physical Activity Questionnaire with a validated position and motion instrument. Eur J Epidemiol 23, 311–322.
15Livingstone, MB & Black, AE (2003) Markers of the validity of reported energy intake. J Nutr 133, Suppl. 3, 895S–920S.
16Lillegaard, IT & Andersen, LF (2005) Validation of a pre-coded food diary with energy expenditure, comparison of under-reporters v. acceptable reporters. Br J Nutr 94, 998–1003.
17Andersen, LF, Pollestad, ML, Jacobs, DR Jr, et al. (2005) Validation of a pre-coded food diary used among 13-year-olds: comparison of energy intake with energy expenditure. Public Health Nutr 8, 1315–1321.
18Altman, DG (1999) Practical Statistics for Medical Research. London: Chapman & Hall.
19Whybrow, S, Horgan, G & Stubbs, RJ (2008) Low-energy reporting and duration of recording period. Eur J Clin Nutr 62, 1148–1150.
20Poppitt, SD, Swann, D, Black, AE, et al. (1998) Assessment of selective under-reporting of food intake by both obese and non-obese women in a metabolic facility. Int J Obes Relat Metab Disord 22, 303–311.
21Lambe, J & Kearney, J (1999) The influence of survey duration on estimates of food intakes – relevance for food-based dietary guidelines. Br J Nutr 81, Suppl. 2, S139–S142.
22Lambe, J, Kearney, J, Leclercq, C, et al. (2000) The influence of survey duration on estimates of food intakes and its relevance for public health nutrition and food safety issues. Eur J Clin Nutr 54, 166–173.
23de Castro, JM (1991) Weekly rhythms of spontaneous nutrient intake and meal pattern of humans. Physiol Behav 50, 729–738.
24Koebnick, C, Wagner, K, Thielecke, F, et al. (2005) An easy-to-use semiquantitative food record validated for energy intake by using doubly labelled water technique. Eur J Clin Nutr 59, 989–995.