The Boost study: design of a school- and community-based randomised trial to promote fruit and vegetable consumption among teenagers

BMC Public Health

Pernille Due¹  Anne Maj Christensen¹  Anne Hjøllund Christiansen²  Anne Kristine Aarestrup¹  Thea Suldrup Jørgensen¹  Rikke Krølner¹ 

[1]Centre for Intervention Research in Health Promotion and Disease Prevention, University of Southern Denmark, National Institute of Public Health, Øster Farimagsgade 5A 2nd floor, 1353 Copenhagen K, Denmark

[2]The Danish Institute for Health Services Research (DSI), Dampfærgevej 27-29, 2100 Copenhagen Ø, Denmark

关键词: Intervention Mapping;    accessibility;    availability;    community;    adolescents;    intervention;    school;    vegetables;    fruit;   

Others  :  1163784
DOI  :  10.1186/1471-2458-12-191

 received in 2011-12-23, accepted in 2012-03-14,  发布年份 2012

【 摘 要 】

Background

The aim of the Boost study was to produce a persistent increase in fruit and vegetable consumption among 13-year-olds. This paper describes the development, implementation and evaluation of a school-and community-based, multi-component intervention guided by theory, evidence, and best practice.

Methods/design

We used the Intervention Mapping protocol to guide the development of the intervention. Programme activities combined environmental and educational strategies and focused on increasing access to fruit and vegetables in three settings: School: Daily provision of free fruit and vegetables; a pleasant eating environment; classroom curricular activities; individually computer tailored messages; one-day-workshop for teachers. Families: school meeting; guided child-parent activities; newsletters. Local community: guided visits in grocery stores and local area as part of classroom curriculum; information sheets to sports-and youth clubs.

The Boost study employed a cluster-randomised controlled study design and applied simple two-stage cluster sampling: A random sample of 10 municipalities followed by a random sample of 4 schools within each municipality (N = 40 schools). Schools were randomised into a total of 20 intervention-and 20 control schools. We included all year 7 pupils except those from school classes with special needs. Timeline: Baseline survey: August 2010. Delivery of intervention: September 2010-May 2011. First follow-up survey: May/June 2011. Second follow-up survey: May/June 2012. Primary outcome measures: Daily mean intake of fruit and vegetables and habitual fruit and vegetable intake measured by validated 24-hour recall-and food frequency questionnaires. Secondary outcome measures: determinants of fruit and vegetable intake, positive side-effects and unintended adverse effects. Implementation was monitored by thorough process evaluation.

Discussion

The baseline data file included 2,156 adolescents (95%). There was baseline equivalence between intervention-and control groups for sociodemographics, primary outcomes, and availability at home, school and sports-and youth clubs. Significantly larger proportions of pupils in the control group had parents born in Denmark. The study will provide insights into effective strategies to increase fruit and vegetable intake among teenagers. The study will gain knowledge on implementation processes, intervention effects in population subgroups with low intake, and opportunities for including local communities in interventions.

Trial registration

Current Controlled Trials ISRCTN11666034.

【 授权许可】

   
2012 Krølner et al; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

【 参考文献 】

• [1]Vereecken CA, De Henauw S, Maes L: Adolescents' food habits: results of the Health Behaviour in School-aged Children survey. Br J Nutr 2005, 94:423-431.
• [2]Yngve A, Wolf A, Poortvliet E, Elmadfa I, Brug J, Ehrenblad B, Franchini B, Haraldsdóttir J, Krølner R, Maes L, Pérez-Rodrigo C, Sjöström M, Thórsdóttir I, Klepp KI: Fruit and vegetable intake in a sample of 11-year-old children in 9 European countries: The Pro Children Cross-sectional Survey. Ann Nutr Metab 2005, 49:236-245.
• [3]Rasmussen M, Krølner R, Klepp KI, Lytle L, Brug J, Bere E, Due P: Determinants of fruit and vegetable consumption among children and adolescents: a review of the literature. Part I: quantitative studies. Int J Behav Nutr Phys Act 2006, 3:22. BioMed Central Full Text
• [4]Vereecken C, Ojala K, Jordan MD: Eating habits. In Young people's health in context: international report from the HBSC 2001/02 survey. WHO Policy Series: Health policy for children and adolescents Issue 4. Edited by Currie C, Roberts C, Morgan A, Smith R, Settertobulte W, Samdal O, et al.. Copenhagen: WHO Regional Office for Europe; 2004:110-119.
• [5]Currie C, Gabhainn SN, Godeau E, Roberts C, Smith R, Currie D et al. (Eds): Section 3: Health behaviours. Eating behaviour: Fruit consumption In Inequalities in young people's health. Health Behaviour in School-aged Children international report from the 2005/2006 survey. Health policy for children and adolescents, no. 5. Copenhagen: WHO Regional Office for Europe; 2008:89-92.
• [6]Krølner R, Rasmussen M, Brug J, Klepp KI, Wind M, Due P: Determinants of fruit and vegetable consumption among children and adolescents: a review of the literature. Part II: qualitative studies. Int J Behav Nutr Phys Act 2011, 8:112. BioMed Central Full Text
• [7]Ioannou S: Young people's accounts of smoking, exercising, eating and drinking alcohol: being cool or being unhealthy? Crit Publ Health 2003, 13:357-371.
• [8]Neumark-Sztainer D, Story M, Ackard D, Moe J, Perry C: The "Family Meal": Views of Adolescents. J Nutr Educ 2000, 32:329-334.
• [9]Contento IR, Williams SS, Michela JL, Franklin AB: Understanding the food choice process of adolescents in the context of family and friends. J Adolesc Health 2006, 38:575-582.
• [10]Lien N, Lytle LA, Klepp KI: Stability in consumption of fruit, vegetables, and sugary foods in a cohort from age 14 to age 21. Prev Med 2001, 33:217-226.
• [11]Lien N, Klepp KI: Consumption of fruit and vegetables in a teenage cohort-observed changes. Tidsskr Nor Laegeforen 1999, 119:2327-2330.
• [12]Knai C, Pomerleau J, Lock K, McKee M: Getting children to eat more fruit and vegetables: a systematic review. Prev Med 2006, 42:85-95.
• [13]Van Cauwenberghe E, Maes L, Spittaels H, van Lenthe FJ, Brug J, Oppert JM, De Bourdeaudhuij I: Effectiveness of school-based interventions in Europe to promote healthy nutrition in children and adolescents: systematic review of published and 'grey' literature. Br J Nutr 2010, 103:781-797.
• [14]Blanchette L, Brug J: Determinants of fruit and vegetable consumption among 6-12-year-old children and effective interventions to increase consumption. J Hum Nutr Diet 2005, 18:431-443.
• [15]French SA, Stables G: Environmental interventions to promote vegetable and fruit consumption among youth in school settings. Prev Med 2003, 37:593-610.
• [16]Bere E, Veierød MB, Bjelland M, Klepp KI: Free school fruit-sustained effect 1 year later. Health Educ Res 2006, 21:268-275.
• [17]Bere E, Veierød MB, Skare Ø, Klepp KI: Free school fruit -sustained effect three years later. Int J Behav Nutr Phys Act 2007, 4:5. BioMed Central Full Text
• [18]Bere E, Veierød MB, Klepp KI: The Norwegian School Fruit Programme: evaluating paid vs. no-cost subscriptions. Prev Med 2005, 41:463-470.
• [19]He M, Beynon C, Sangster BM, St Onge R, Stewart S, Khoshaba L, Horbul BA, Chircoski B: Impact evaluation of the Northern Fruit and Vegetable Pilot Programme -a cluster-randomised controlled trial. Publ Health Nutr 2009, 12:2199-2208.
• [20]Reinaerts E, De Nooijer J, Candel M, de Vries N: Increasing children's fruit and vegetable consumption: distribution or a multicomponent programme? Publ Health Nutr 2007, 10:939-947.
• [21]Te Velde SJ, Brug J, Wind M, Hildonen C, Bjelland M, Pérez-Rodrigo C, Klepp KI: Effects of a comprehensive fruit-and vegetable-promoting school-based intervention in three European countries: the Pro Children Study. Br J Nutr 2008, 99:893-903.
• [22]Eriksen K, Haraldsdóttir J, Pederson R, Flyger HV: Effect of a fruit and vegetable subscription in Danish schools. Publ Health Nutr 2003, 6:57-63.
• [23]Hoffman JA, Franko DL, Thompson DR, Power TJ, Stallings VA: Longitudinal behavioral effects of a school-based fruit and vegetable promotion program. J Pediatr Psychol 2010, 35:61-71.
• [24]Bere E, Hilsen M, Klepp KI: Effect of the nationwide free school fruit scheme in Norway. Br J Nutr 2010, 104:589-594.
• [25]Davis M, Baranowski T, Resnicow K, Baranowski J, Doyle C, Smith M, Wang DT, Yaroch A, Hebert D: Gimme 5 fruit and vegetables for fun and health: process evaluation. Health Educ Behav 2000, 27:167-176.
• [26]Story M, Mays RW, Bishop DB, Perry CL, Taylor G, Smyth M, Gray C: 5-a-day Power Plus: process evaluation of a multicomponent elementary school program to increase fruit and vegetable consumption. Health Educ Behav 2000, 27:187-200.
• [27]Pearson N, Biddle SJ, Gorely T: Family correlates of fruit and vegetable consumption in children and adolescents: a systematic review. Publ Health Nutr 2009, 12:267-283.
• [28]Perez-Rodrigo C, Aranceta J: Nutrition education in schools: experiences and challenges. Eur J Clin Nutr 2003, 57(Suppl 1):S82-S85.
• [29]Sallis JF, Owen N, Fisher EB: Ecological models of health behavior. In Health behavior and health education. Theory, research, and practice. 4th edition. Edited by Glanz K, Rimer BK, Viswanath K. San Francisco: Jossey-Bass; 2008:465-485.
• [30]Reinaerts E, Crutzen R, Candel M, De Vries NK, De Nooijer J: Increasing fruit and vegetable intake among children: comparing long-term effects of a free distribution and a multicomponent program. Health Educ Res 2008, 23:987-996.
• [31]Reinaerts EB, De Nooijer J, De Vries NK: Fruit and vegetable distribution program versus a multicomponent program to increase fruit and vegetable consumption: which should be recommended for implementation? J Sch Health 2007, 77:679-686.
• [32]Durlak JA, DuPre EP: Implementation matters: a review of research on the influence of implementation on program outcomes and the factors affecting implementation. Am J Community Psychol 2008, 41:327-350.
• [33]Linnan L, Steckler A: Process evaluation for public health interventions and research: an overview. In Process evaluation for public health interventions and researc. 1st edition. Edited by Steckler A, Linnan L. San Francisco: Jossey-Bass; 2002:1-23.
• [34]Kroeze W, Werkman A, Brug J: A systematic review of randomized trials on the effectiveness of computer-tailored education on physical activity and dietary behaviors. Ann Behav Med 2006, 31:205-223.
• [35]Neville LM, O'Hara B, Milat AJ: Computer-tailored dietary behaviour change interventions: a systematic review. Health Educ Res 2009, 24:699-720.
• [36]De Bourdeaudhuij I, Van Cauwenberghe E, Spittaels H, Oppert JM, Rostami C, Brug J, van Lenthe F, Lobstein T, Maes L: School-based interventions promoting both physical activity and healthy eating in Europe: a systematic review within the HOPE project. Obes Rev 2011, 12:205-216.
• [37]Haerens L, De Bourdeaudhuij I, Maes L, Vereecken C, Brug J, Deforche B: The effects of a middle-school healthy eating intervention on adolescents' fat and fruit intake and soft drinks consumption. Publ Health Nutr 2007, 10:443-449.
• [38]Delgado-Noguera M, Tort S, Martinez-Zapata MJ, Bonfill X: Primary school interventions to promote fruit and vegetable consumption: a systematic review and meta-analysis. Prev Med 2011, 53:3-9.
• [39]Wind M, Bjelland M, Pérez-Rodrigo C, Te Velde SJ, Hildonen C, Bere E, Klepp KI, Brug J: Appreciation and implementation of a school-based intervention are associated with changes in fruit and vegetable intake in 10-to 13-year old schoolchildren the Pro Children study. Health Educ Res 2008, 23:997-1007.
• [40]Krebs P, Prochaska JO, Rossi JS: A meta-analysis of computer-tailored interventions for health behavior change. Prev Med 2010, 51:214-221.
• [41]Thomas H: Obesity prevention programs for children and youth: why are their results so modest? Health Educ Res 2006, 21:783-795.
• [42]Baranowski T, Jago R: Understanding the mechanisms of change in children's physical activity programs. Exerc Sport Sci Rev 2005, 33:163-168.
• [43]Ammerman AS, Lindquist CH, Lohr KN, Hersey J: The efficacy of behavioral interventions to modify dietary fat and fruit and vegetable intake: a review of the evidence. Prev Med 2002, 35:25-41.
• [44]Kokko S, Kannas L, Villberg J: Health promotion profile of youth sports clubs in Finland: club officials' and coaches' perceptions. Health Promot Int 2009, 24:26-35.
• [45]Kelly B, Baur LA, Bauman AE, King L, Chapman K, Smith BJ: Examining opportunities for promotion of healthy eating at children's sports clubs. Aust N Z J Public Health 2010, 34:583-588.
• [46]Dobbinson SJ, Hayman JA, Livingston PM: Prevalence of health promotion policies in sports clubs in Victoria, Australia. Health Promot Int 2006, 21:121-129.
• [47]TNS Gallup for Sundhedsstyrelsen og Kræftens Bekæmpelse: An indication of smoking, food and drinks in sports halls and sports clubs, April-May 2004. An investigation among people involved in the practicalities of the facilities [in Danish: Pejling af røg, mad og drikke i sportshaller og idrætsklubber, april-maj 2004. Undersøgelse blandt personer med praktisk tilknytning til faciliteterne]. Copenhagen: Sundhedsstyrelsen; 2004.
• [48]Christensen LM, Brot C, Tetens I: Food and meals in youth clubs [in Danish: Mad og måltider i fritidsklubber]. Copenhagen: Danmarks Fødevareforskning; 2006.
• [49]Priest N, Armstrong R, Doyle J, Waters E: Policy interventions implemented through sporting organisations for promoting healthy behaviour change. Cochrane Database Syst Rev 2008, (3):CD004809. DOI: 10.1002/14651858.CD004809.pub3
• [50]Story M, Kaphingst KM, Robinson-O'Brien R, Glanz K: Creating healthy food and eating environments: policy and environmental approaches. Annu Rev Public Health 2008, 29:253-272.
• [51]Bartholomew LK, Parcel GS, Kok G, Gottlieb NH, Fernández ME: Planning health promotion programs. An intervention mapping approach. 3rd edition. San Francisco: Jossey-Bass; 2011.
• [52]The ministry of children and education: Facts about the primary and lower secondary levels of education cover the public school system (the Folkeskole) and private schools [http://eng.uvm.dk/Fact-Sheets/Primary-and-lower-secondary-education] webcite
• [53]New to Denmark.dk -The official portal for foreigners and integration: School and education [http:/ / www.nyidanmark.dk/ en-us/ citizenship/ citizen_in_denmark/ 7+school+and+education.htm] webcite
• [54]Ministry of Foreign Affairs of Denmark. Factsheet Denmark December 2003. Body Culture and sport [http:/ / www.netpub.dk/ netpub/ client_projects/ udenrigsministeriet/ project/ 8911/ 8911/ pdf/ Body_Culture_and_Sport.pdf] webcite
• [55]Klepp KI, Pérez-Rodrigo C, De Bourdeaudhuij I, Due P, Elmadfa I, Haraldsdóttir J, König J, Sjöström M, Thórsdóttir I, de Almeida MDV, Yngve A, Brug J: Promoting fruit and vegetable consumption among European schoolchildren: rationale, conceptualization and design of the Pro Children project. Ann Nutr Metab 2005, 49:212-220.
• [56]Lien N, Bjelland M, Bergh IH, Grydeland M, Anderssen SA, Ommundsen Y, Andersen LF, Henriksen HB, Randby JS, Klepp KI: Design of a 20-month comprehensive, multicomponent school-based randomised trial to promote healthy weight development among 11-13 year olds: The Health In Adolescents study. Scand J Publ Health 2010, 38:38-51.
• [57]Perez-Rodrigo C, Wind M, Hildonen C, Bjelland M, Aranceta J, Klepp KI, Brug J: The Pro Children intervention: applying the Intervention Mapping protocol to develop a school-based fruit and vegetable promotion programme. Ann Nutr Metab 2005, 49:267-277.
• [58]Glasgow RE, Vogt TM, Boles SM: Evaluating the public health impact of health promotion interventions: the RE-AIM framework. Am J Public Health 1999, 89:1322-1327.
• [59]Michie S, Johnston M, Francis J, Hardeman W, Eccles M: From Theory to Intervention: Mapping Theoretically Derived Behavioural Determinants to Behaviour Change Techniques. Appl Psychol Int Rev 2008, 57:660-680.
• [60]Baranowski T, Cullen KW, Baranowski J: Psychosocial correlates of dietary intake: advancing dietary intervention. Annu Rev Nutr 1999, 19:17-40.
• [61]World Health Organization: Global Strategy on Diet, Physical Activity and Health. Promoting fruit and vegetable consumption around the world. [http://www.who.int/dietphysicalactivity/fruit/en/index2.html] webcite
• [62]"The food school class" [in Danish: Madklassen] [http:/ / www.madklassen.dk/ Undervisning/ Opgavesamling_om_de_otte_kostraad/ Forside.htm] webcite
• [63]Fruit break [In Danish: Frugtkvarter] [http://www.cancer.dk/forebyg/spise/boern/sunde+boern.htm] webcite
• [64]The Pro Children project. Promoting and Sustaining Health through Increased Vegetable and Fruit Consumption among European Schoolchildren [http://www.prochildren.org] webcite
• [65]The Heia project: [in Norwegian: Heia-prosjektet] [http://www.heia-prosjektet.org/] webcite
• [66]"Buddy with Your Body -5 a day" project [In Swedish: Kompis med Kroppen -5 om dan] [http://www.ica.se/kompis-med-kroppen] webcite
• [67]"The Day of Taste" [in Danish: Smagens Dag] [http://www.smagensdag.dk] webcite
• [68]6 a day [in Danish: 6 om dagen] [http://www.voresmad.dk/Inspiration/Fokus/6omdagen.aspx] webcite
• [69]OverNite Software Europe BV [http://www.ose.nl/home] webcite
• [70]Kamphuis CB, Giskes K, de Bruijn GJ, Wendel-Vos W, Brug J, van Lenthe FJ: Environmental determinants of fruit and vegetable consumption among adults: a systematic review. Br J Nutr 2006, 96:620-635.
• [71]Maclellan DL, Gottschall-Pass K, Larsen R: Fruit and vegetable consumption: benefits and barriers. Can J Diet Pract Res 2004, 65:101-105.
• [72]Hill L, Casswell S, Maskill C, Jones S, Wyllie A: Fruit and vegetables as adolescent food choices in New Zealand. Health Promot Int 1998, 13:55-65.
• [73]Kirby SD, Baranowski T, Reynolds KD, Taylor G, Binkley D: Children's fruit and vegetable intake -Socioeconomic, adult-child, regional, and urban-rural influences. J Nutr Educ 1995, 27:261-271.
• [74]Attrup ML, Olsson JR: Communication and change [in Danish: Kommunikation og forandring]. In Power in project and portfolios [in Danish: Power i projekter & portefølje]. 2nd edition. Copenhagen: DJØF Forlag; 2008:261-309.
• [75]Donner A, Klar N: Statistical considerations in the design and analysis of community intervention trials. J Clin Epidemiol 1996, 49:435-439.
• [76]De Bourdeaudhuij I, Klepp KI, Due P, Pérez Rodrigo C, de Almeida MDV, Wind M, Krølner R, Sandvik C, Brug J: Reliability and validity of a questionnaire to measure personal, social and environmental correlates of fruit and vegetable intake in 10-11-year-old children in five European countries. Publ Health Nutr 2005, 8:189-200.
• [77]Haraldsdóttir J, Thórsdóttir I, de Almeida MDV, Maes L, Pérez-Rodrigo C, Elmadfa I, Andersen LF: Validity and reproducibility of a precoded questionnaire to assess fruit and vegetable intake in European 11-to 12-year-old schoolchildren. Ann Nutr Metab 2005, 49:221-227.
• [78]Roberts C, Freeman J, Samdal O, Schnohr CW, de Looze ME, Nic GS, Iannotti R, Rasmussen M: The Health Behaviour in School-aged Children (HBSC) study: methodological developments and current tensions. Int J Publ Health 2009, 54(Suppl 2):140-150.
• [79]2008 North Carolina CHAMP Child Health Assessment and Monitoring Program Survey [http://www.schs.state.nc.us/SCHS/champ/pdf/CHAMPQ08.pdf] webcite
• [80]Andersen LT, Jensen H, Haraldsdóttir J: Typical weights for food items [in Danish:Typiske vægte for madvarer]. Scand J Nutr 1996, 4:S129-S152.
• [81]Bjelland M, Lien N, Grydeland M, Bergh IH, Anderssen SA, Ommundsen Y, Klepp KI, Andersen LF: Intakes and perceived home availability of sugar-sweetened beverages, fruit and vegetables as reported by mothers, fathers and adolescents in the HEIA (HEalth In Adolescents) study. Public Health Nutr 2011, 31:1-10.
• [82]Rogers EM: Diffusion of preventive innovations. Addict Behav 2002, 27:989-993.
• [83]Winter S: Implementation and effectiveness [In Danish: Implementering og effektivitet]. 1st edition. Århus: Systime; 1994.
• [84]Coast J: Is economic evaluation in touch with society's health values? BMJ 2004, 329:1233-1236.
• [85]Reinaerts E, De Nooijer J, De Vries NK: Using intervention mapping for systematic development of two school-based interventions aimed at increasing children's fruit and vegetable intake. Health Educ 2008, 108:301-320.
• [86]Befort C, Lynch R, James RL, Carroll SL, Nollen N, Davis A: Perceived barriers and benefits to research participation among school administrators. J Sch Health 2008, 78:581-586.
• [87]Vinther-Larsen M, Riegels M, Rod MH, Schiotz M, Curtis T, Gronbaek M: The Danish Youth Cohort: characteristics of participants and non-participants and determinants of attrition. Scand J Publ Health 2010, 38:648-656.
• [88]Tak NI, Te Velde SJ, Brug J: Long-term effects of the Dutch Schoolgruiten Project- promoting fruit and vegetable consumption among primary-school children. Publ Health Nutr 2009, 12:1213-1223.
• [89]Bere E, Veierød MB, Bjelland M, Klepp KI: Outcome and process evaluation of a Norwegian school-randomized fruit and vegetable intervention: Fruits and Vegetables Make the Marks (FVMM). Health Educ Res 2006, 21:258-267.
• [90]Tak NI, Te Velde SJ, Brug J: Are positive changes in potential determinants associated with increased fruit and vegetable intakes among primary schoolchildren? Results of two intervention studies in the Netherlands: the Schoolgruiten Project and the Pro Children Study. Int J Behav Nutr Phys Act 2008, 5:21. BioMed Central Full Text
• [91]Lytle LA, Murray DM, Perry CL, Story M, Birnbaum AS, Kubik MY, Varnell S: School-based approaches to affect adolescents' diets: results from the TEENS study. Health Educ Behav 2004, 31:270-287.
• [92]Mellanby AR, Rees JB, Tripp JH: Peer-led and adult-led school health education: a critical review of available comparative research. Health Educ Res 2000, 15:533-545.
• [93]Campbell R, Starkey F, Holliday J, Audrey S, Bloor M, Parry-Langdon N, Hughes R, Moore L: An informal school-based peer-led intervention for smoking prevention in adolescence (ASSIST): a cluster randomised trial. Lancet 2008, 371:1595-1602.
• [94]Nordahl H, Krølner R, Pall G, Currie C, Andersen A: Measurement of ethnic background in cross-national school surveys: agreement between students' and parents' responses. J Adolesc Health 2011, 49:272-277.
• [95]Yackinous CA, Guinard JX: Relation between PROP (6-n-propylthiouracil) taster status, taste anatomy and dietary intake measures for young men and women. Appetite 2002, 38:201-209.
• [96]Wardle J, Cooke L: Genetic and environmental determinants of children's food preferences. Br J Nutr 2008, 99(Suppl 1):S15-S21.
• [97]Feeney E, O'Brien S, Scannell A, Markey A, Gibney ER: Genetic variation in taste perception: does it have a role in healthy eating? Proc Nutr Soc 2011, 70:135-143.
• [98]Dinehart ME, Hayes JE, Bartoshuk LM, Lanier SL, Duffy VB: Bitter taste markers explain variability in vegetable sweetness, bitterness, and intake. Physiol Behav 2006, 87:304-313.
• [99]Baranowski T, Baranowski JC, Watson KB, Jago R, Islam N, Beltran A, Martin SJ, Nguyen N, Tepper BJ: 6-n-propylthiouracil taster status not related to reported cruciferous vegetable intake among ethnically diverse children. Nutr Res 2011, 31:594-600.
• [100]Reinaerts E, de Nooijer J, van de Kar A, de Vries N: Development of a school-based intervention to promote fruit and vegetable consumption: Exploring perceptions among 4-to-12-year old children and their parents. Health Educ 2006, 106:345-356.