Effects Job Rotation in the Prevention of Work Related Musculoskeletal Disorders (Jobrotation)

February 23, 2016 updated by: Rosimeire Simprini Padula, Universidade Cidade de Sao Paulo

Effects Job Rotation in the Prevention of Work Related Musculoskeletal Disorders: Cluster Randomized Trial

The objective this study is evaluated if job rotation (change works that function every to work hours)contributes to reduce absence from work to complaints musculoskeletal disorders. And:

  • Improve general health status
  • Improve musculoskelettal symptoms
  • Improve work performance
  • Decrease costs with absence

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

This study is single-blinded RCT, whose aim is to evaluate the effect of the rotation function in the prevention of musculoskeletal disorders in industrial workers Methods: Participants will be recruited from employees a textile industry. The inclusion criteria are: employees age between 18 and 65 years and be able to read and understand the questionnaires. The number of working hours lost due to leave for sick leave due to illness of the musculoskeletal system and connective tissue (M Group International Classification of Diseases, ICD-10) is used to estimate the sample size. The average time lost during the last three months, in companies where the study was conducted is approximately 1,100 hours. Assume that interventions will enable a reduction of this number by 10%, ie, the groups will have a difference of 100 lost working hours, with a standard deviation of 250 hours. Will be considered a statistical power of 80%, α=0.05 and a follow-up loss of up to 15%. Thus, 116 workers are required per group. The productive sectors included in the study will be pre- stratified from the level of exposure to ergonomic risk factors. The sectors with similar demands will be grouped and randomly divided between the intervention group and the control group. The intervention group will perform rotation function, switching between tasks with low, moderate and high ergonomic risk and different requests for ergonomic body region added to ergonomic guidelines. The control group will receive only the ergonomic guidelines. Primary outcomes: Absence from work due to sick leave due to disease of the musculoskeletal system and connective tissue. Secondary outcomes are: musculoskeletal symptoms (Nordic Questionnaire and EVA), ergonomic risk factors (Quick exposure Check and Job Factors Questionnaire), psychosocial factors and fatigue (Need for Recovery Scale (NFR), general health status (WHOQOL-bref), physical activity level (Baecke Questionnaire), productivity with Work Performance Questionnaire (HPQ) and costs (incremental cost effectiveness ratio). Outcomes will be assessed at baseline and after 3 , 6 and 12 months . The information on the amount of hours lost by removal for medical leave will be recorded daily. Expected results: It is expected that interventions to reduce the occurrence of musculoskeletal disorders and consequent worker absenteeism due to sick leave, 100 hours of work lost. It is expected that the results obtained in this study may contribute to setting standards in the field of Occupational Health, as well as for decision making of professionals working in this area.

Study Type

Interventional

Enrollment (Anticipated)

116

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Brazil
    • SP
      • Atibaia, SP, Brazil, 12942-770
        • Rosimeire Simprini Padula

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Sectors workers with production lines that allow switching between different tasks and requests biomechanical exposure levels ergonomic risk. And work is carried out in production cells.

Exclusion Criteria:

  • Sector workers whose production lines are automated or semi-automated, possessing the pace of work determined by machinery and that the work stoppage is not possible.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Single Group Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Job rotation
The intervention group will perform rotation function, switching between tasks with low, moderate and high ergonomic risk and different requests for ergonomic body region added to ergonomic guidelines.
Other: Guidelines ergonomics
Orientation about manual material handling, posture, furniture, rest break and others in general.
Active Comparator: Guidelines Ergonomics
Manual material handling Orientation posture Orientation furniture Orientation in general
Other: Job rotation
The intervention group will perform rotation function, switching between tasks with low, moderate and high ergonomic risk and different requests for ergonomic body region added to ergonomic guidelines.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Decrease musculoskeletal absence from work.
Time Frame: After 6 months
Absence from work due to sick leave due to disease of the musculoskeletal system and connective tissue
After 6 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Decrease Musculoskeletal symptoms
Time Frame: After 6 months
Musculoskeletal symptoms (Nordic Questionnaire1 and EVA)
After 6 months

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change Geral Health Condictions
Time Frame: After 6 months
Psychosocial factors and fatigue (Need for Recovery Scale (NFR), general health status (WHOQOL-bref), physical activity level (Baecke Questionnaire)
After 6 months
Reduced Cost effectiveness
Time Frame: After 6 months
Productivity (Work Performance Questionnaire (HPQ) and costs (incremental cost effectiveness ratio).
After 6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Universidade Cidade de Sao Paulo

Collaborators

Maria Luiza Caires Comper

Investigators

  • Study Director: Rosimeire S Padula, PhD, Universidade Cidade de Sao Paulo

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2013

Primary Completion (Actual)

February 1, 2015

Study Completion (Actual)

February 1, 2016

Study Registration Dates

First Submitted

October 17, 2013

First Submitted That Met QC Criteria

November 3, 2013

First Posted (Estimate)

November 8, 2013

Study Record Updates

Last Update Posted (Estimate)

February 24, 2016

Last Update Submitted That Met QC Criteria

February 23, 2016

Last Verified

February 1, 2016

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 18170313500000064

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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