1Perez-Rodrigo C, Klepp KI, Yngve A, Sjostrom M, Stockley L, Aranceta J. The school setting: an opportunity for the implementation of dietary guidelines. Public Health Nutrition 2001; 4: 717–24.
2Gibson EL, Wardle J, Watts CJ. Fruit and vegetable consumption, nutritional knowledge and beliefs in mothers and children. Appetite 1998; 31: 205–28.
3Gregory J, Lowe S, Bates CJ, Prentice A, Jackson L, Smithers G, et al. National Diet and Nutrition Survey: Young People aged 4 to 18 years. London: The Stationery Office, 2000.
4Livingstone MBE, Robson PJ, Wallace JMW. Issues in dietary intake assessment of children and adolescents. British Journal of Nutrition 2004; 92: S213–22.
5Byers T, Trieber F, Gunter E, Coates R, Sowell A, Leonard S, et al. The accuracy of parental reports of their children's intake of fruits and vegetables: validation of a food frequency questionnaire with serum levels of carotenoids and vitamins C, A, and E. Epidemiology 1993; 4: 350–5.
6Coufopoulos A-M, Maggs C, Hackett A. Doing dietary research with adolescents: the problems of data collection in the school setting. International Journal of Health Promotion & Education 2001; 39: 100–5.
7McPherson RS, Hoelscher DM, Alexander M, Scanlon KS, Serdula MK. Dietary assessment methods among school-aged children: validity and reliability. Preventive Medicine 2000; 31: S11–33.
8Bland JM, Altman DG. Comparing two methods of clinical measurement: a personal history. International Journal of Epidemiology 1995; 24: S7–14.
9Bland JM, Altman DG. Statistical methods for assessing agreement between two methods of clinical measurement. Lancet 1986; 1: 307–10.
10Department for Education and Skills. Statistics of Education Schools in England 2002 Edition. London: The Stationery Office, 2002.
11Chinn S, Rona RJ. Prevalence and trends in overweight and obesity in three cross sectional studies of British children, 1974–94. British Medical Journal 2001; 322: 24–6.
12Sahota P, Rudolf MC, Dixey R, Hill AJ, Barth JH, Cade J. Randomised controlled trial of primary school based intervention to reduce risk factors for obesity. British Medical Journal 2001; 323: 1029–32.
14Barasi ME. Human Nutrition. A Health Perspective. London: Arnold, 1997.
15Garrow JS, James WPT, Ralph A. Human Nutrition and Dietetics. London: Churchill Livingstone, 2000.
16Ministry of Agriculture, Fisheries and Food. Food Portion Sizes, 2nd ed. London: The Stationery Office, 1993.
17Cade J, Thompson R, Burley V, Warm D. Development, validation and utilisation of food-frequency questionnaires. Public Health Nutrition 2002; 5: 567–87.
18Shimizu H, Ohwaki A, Kurisu Y, Takatsuka N, Ido M, Kawakami N, et al. Validity and reproducibility of a quantitative food frequency questionnaire for a cohort study in Japan. Japanese Journal of Clinical Oncology 1999; 29: 38–44.
19Blom L, Lundmark K, Dahlquist G, Persson LA. Estimating children's eating habits. Validity of a questionnaire measuring food frequency compared to a 7-day record. Acta Paediatrica Scandinavica 1989; 78: 858–64.
20Kristal AR, Beresford SA, Lazovich D. Assessing change in diet-intervention research. American Journal Clinical Nutrition 1994; 59: 185S–9S.
21Clapp JA, McPherson RS, Reed DB, Hsi BP. Comparison of a food frequency questionnaire using reported vs standard portion sizes for classifying individuals according to nutrient intake. Journal of the American Dietetic Association 1991; 91: 316–20.
22Rockett HR, Colditz GA. Assessing diets of children and adolescents. American Journal of Clinical Nutrition 1997; 65: 1116S–22S.
23Domel SB, Baranowski T, Davis H, Leonard SB, Riley P, Baranowski J. Fruit and vegetable food frequencies by fourth and fifth grade students: validity and reliability. Journal of the American College of Nutrition 1994; 13: 33–9.
24Lemaitre RN, King IB, Patterson RE, Psaty BM, Kestin M, Heckbert SR. Assessment of trans-fatty acid intake with a food frequency questionnaire and validation with adipose tissue levels of trans-fatty acids. American Journal of Epidemiology 1998; 148: 1085–93.