title: Using nudging and social marketing techniques to create healthy worksite cafeterias in the Netherlands: intervention development and study design.
abstract: The worksite cafeteria is a suitable setting for interventions focusing on changing eating behavior, because a lot of employees visit the worksite cafeteria regularly and a variety of interventions could be implemented there. The aim of this paper is to describe the intervention development and design of the evaluation of an intervention to make the purchase behavior of employees in the worksite cafeteria healthier. The developed intervention called "the worksite cafeteria 2.0" consists of a set of 19 strategies based on theory of nudging and social marketing (marketing mix). The intervention will be evaluated in a real-life setting, that is Dutch worksite cafeterias of different companies and with a number of contract catering organizations.
  
  
  
  The study is a randomized controlled trial (RCT), with 34 Dutch worksite cafeterias randomly allocated to the 12-week intervention or to the control group. Primary outcomes are sales data of selected products groups like sandwiches, salads, snacks and bread topping. Secondary outcomes are satisfaction of employees with the cafeteria and vitality.
  
  
  
  When executed, the described RCT will provide better knowledge in the effect of the intervention ﻿"the worksite cafeteria 2.0" on the purchasing behavior of Dutch employees in worksite cafeterias.
  
  
  
  Dutch Trial register: NTR5372 .
authors.affiliation: Department of Health Sciences and the EMGO+ Institute for Health and Care Research, Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081 HV, Amsterdam, The Netherlands. e.velema@vu.nl.
authors.forename: Elizabeth
authors.identifier: 0000-0002-0164-8306
authors.initials: E
authors.lastname: Velema
authors.affiliation: Department of Health Sciences and the EMGO+ Institute for Health and Care Research, Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081 HV, Amsterdam, The Netherlands.
authors.forename: Ellis L
authors.initials: EL
authors.lastname: Vyth
authors.affiliation: Department of Health Sciences and the EMGO+ Institute for Health and Care Research, Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081 HV, Amsterdam, The Netherlands.
authors.forename: Ingrid H M
authors.initials: IH
authors.lastname: Steenhuis
mesh_terms: D005247:Feeding Behavior; D005260:Female; D005518:Food Preferences; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D008297:Male; D009426:Netherlands; D015397:Program Evaluation / Q000706:statistics & numerical data*; D012107:Research Design; D040241:Social Marketing; D017132:Workplace
keywords: Employee; Nudging; Overweight; Purchasing behavior; Randomized controlled trial; Social marketing; Worksite cafeteria