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0399 Effectiveness of a multidisciplinary intervention among Dutch construction workers on respirable quartz exposure: results from the ‘Relieved Working Study’
  1. Erik van Deurssen1,2,
  2. Karen Oude Hengel2,
  3. Suzanne Spaan2,
  4. Henk Goede2,
  5. Tim Meijster2,
  6. Erik Tielemans2,
  7. Dick Heederik1,
  8. Anjoeka Pronk2
  1. 1Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
  2. 2TNO, Zeist, The Netherlands

Abstract

Objectives A multidisciplinary intervention study aimed at reducing quartz exposure in the Dutch construction industry was performed. We aimed to assess the effect of the intervention on exposure level and psycho-social and organisational factors.

Method Eight participating construction companies were randomly allocated to an intervention (n = 4) or control group (n = 4). Following the Intervention Mapping approach, the intervention aimed at engineering, organisational and psycho-social factors. Pre and post-intervention respirable quartz measurements (n = 300) were taken from workers from all eight companies. Questionnaires and observation forms were used to assess pre and post psycho-social and organisational factors.

Results Pre-intervention assessment demonstrated highest respirable quartz levels for concrete drillers, tuck pointers and demolishers (GM respectively 0.20, 0.18 and 0.12 mg/m3), exceeding the Dutch occupational exposure limit (OEL) in 62% of the measurements. Identified control measures resulted in 30% reduction in quartz exposure. More social influence was associated with a 1.5 fold increased use of control measures. The post intervention assessments will become available early 2014.

Conclusions High exposure levels exceeding the Dutch OEL were observed. Associations between organisational, psycho-social and use of control measures found during the pre-intervention, were taken into consideration when developing the intervention strategy. A comparison between pre and post intervention outcomes will be presented during the conference. The effect of changes in exposure levels as a result of the intervention will be assessed with a health impact assessment model incorporating population dynamics.

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