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Effectiveness of a participatory approach on the use of four ergonomic measures reducing musculoskeletal disorders among construction workers compared with no intervention.


- candidate number0
- NTR NumberNTR330
- ISRCTNISRCTN84454743
- Date ISRCTN created20-dec-2005
- date ISRCTN requested18-okt-2005
- Date Registered NTR16-sep-2005
- Secondary IDsBBC.03.221 
- Public TitleEffectiveness of a participatory approach on the use of four ergonomic measures reducing musculoskeletal disorders among construction workers compared with no intervention.
- Scientific TitleEffectiveness of a participatory approach on the use of four ergonomic measures reducing musculoskeletal disorders among construction workers compared with no intervention.
- ACRONYMN/A
- hypothesisIt has been hypothesised that, because participatory ergonomics (PE) implementation strategies intervene at all phases of behavioural change for the various stakeholders, they may be successful in increasing the use of ergonomic measures at worksites. A PE implementation strategy is defined as the involvement of people in planning and controlling a significant amount of their own work activities with sufficient knowledge and power to influence processes and outcomes to achieve desirable goals.
- Healt Condition(s) or Problem(s) studiedMusculoskeletal disorders (MSDs), Work-related musculoskeletal disorders (WMSDs)
- Inclusion criteriaAlmost no use ( < 10% of the working time) of one ergonomic measure (adjusting the height of bricklaying materials).
- Exclusion criteriaNone (employers and employees were the participants).
- mec approval receivedno
- multicenter trialno
- randomisedyes
- masking/blindingNone
- controlNot applicable
- groupParallel
- Type2 or more arms, randomized
- Studytypeintervention
- planned startdate 1-jan-2003
- planned closingdate1-jan-2005
- Target number of participants118
- Interventions1. A six-step participatory approach aimed at behavioural change among employers and employees within companies guided by an experienced ergonomics consultant during 6 months. Employers, work planners, foremen and representatives of bricklayers and bricklayers’ assistants structured and organised the approach and process through a steering group within each company;
2. No intervention.
- Primary outcomeUse of ergonomic measures (doing).
- Secondary outcomeBehavioural change phases among employers (awareness, accessibility, understanding, wanting, intention and ability) and behavioural change phases among employees (awareness, wanting and ability).
- TimepointsN/A
- Trial web siteN/A
- statusstopped: trial finished
- CONTACT FOR PUBLIC QUERIESProf. PhD Monique Frings-Dresen
- CONTACT for SCIENTIFIC QUERIESDr. H.F. Molen, van der
- Sponsor/Initiator Academic Medical Center (AMC), Coronel Institute for Occupational and Environmental Health, Arbouw
- Funding
(Source(s) of Monetary or Material Support)
WERKGOED (Bouwend Nederland, FNV Bouw, Hout- en Bouw bond CNV, Ministerie van Sociale Zaken en Werkgelegenheid) , Arbouw
- PublicationsScandinavian Journal of Work, Environment and Health 2005;31(3):191-204. Applied Ergonomics 2005; 36: 449-459. Thesis: ‘Evidence-based implementation of ergonomic measures in construction work’, Universiteit van Amsterdam, 2005 (ISBN 90-72748-46-8).
- Brief summaryObjective:
To study the effectiveness of a participatory ergonomics (PE) implementation strategy on the use of ergonomic measures for reducing the physical work demands of construction work.


Methods:
In a cluster randomised controlled trial, ten bricklaying companies were randomly assigned either to an intervention group which was subjected to a PE implementation strategy (N=5) or to a control group (N=5). The PE implementation strategy consisted of a consultant-guided six-step approach in which different stakeholders from the company participated. Bricklayers and bricklayers’ assistants in the intervention group (n=65) and the control group (n=53) were followed for six months and their use of four ergonomic measures was compared. These measures consisted of adjusting working height when picking up bricks and mortar, adjusting working height for bricklaying at the wall side, mechanising the transport of bricks and mechanising the transport of mortar. The use of ergonomic measures was assessed by means of worksite observations and questionnaires at baseline and after six months. The behavioural change phases of the workers and the employers were determined by questionnaires and interviews respectively. Performance indicators for the PE implementation strategy were assessed through observations by researchers during the implementation process and through questionnaires completed by workers.


Results:
The PE implementation strategy had no statistically significant effect on the use of any of the four ergonomic measures either at cluster or at individual level. None of the companies in the intervention group passed through all six steps of the PE implementation strategy. Process outcomes suggest that the ability to use ergonomic measures increased. In bricklaying, self-efficacy and skills to adapt the working height on the scaffolding improved significantly.


Conclusion:
The PE implementation strategy did not lead to greater use of ergonomic measures in bricklaying or in the transport of materials. The performance indicators of the PE implementation strategy and the corresponding behavioural change phases in stakeholders can help to detect essential elements of the intervention.
- Main changes (audit trail)
- RECORD11-okt-2005 - 23-jun-2008


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