title: A poster-based intervention to promote stair use in blue- and white-collar worksites.
abstract: OBJECTIVE
  Previous studies have generally shown the effectiveness of prompts to promote stair use in worksites that mainly consist of white-collar workers. The present study tested whether an intervention using prompts is effective in stimulating stair use in two types of worksites: one consisting mainly of white-collar workers and one mainly of blue-collar workers.
  
  
  METHODS
  In 2005, elevator and stair use (stair climbing and descent) was monitored in two types of worksites in the Netherlands, namely one office building (n=150 white-collar workers) and one paper factory (n=800 blue-collar workers). The study used a simple time-series design of collecting data in three waves: before, during and after implementation of posters containing prompts stimulating stair use.
  
  
  RESULTS
  A total of 6771 choices between stairs and elevator were observed. There was a significant difference between stair use at baseline and during the poster intervention in both types of worksites. There was no worksite-by-intervention interaction, implying that the prompts were equally effective in both types of worksites. After removal of the posters stair use decreased significantly to a level that was not significantly different from baseline.
  
  
  CONCLUSIONS
  Stair use can be positively influenced in both blue- and white-collar workers by a short-term low-cost intervention using prompts on posters.
authors.affiliation: Department of Human Biology, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands. lydia.kwak@prevnut.ki.se
authors.forename: L
authors.initials: L
authors.lastname: Kwak
authors.forename: S P J
authors.initials: SP
authors.lastname: Kremers
authors.forename: M A
authors.initials: MA
authors.lastname: van Baak
authors.forename: J
authors.initials: J
authors.lastname: Brug
mesh_terms: D001296:Audiovisual Aids; D004607:Elevators and Escalators; D015444:Exercise; D005260:Female; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D008297:Male; D009426:Netherlands; D019370:Observation; D015397:Program Evaluation; D016138:Walking / Q000502:physiology; D017132:Workplace