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JCQ scale reliability and responsiveness to changes in manufacturing process.

Authors
d'Errico-A; Punnett-L; Gold-JE; Gore-R
Source
Am J Ind Med 2008 Feb; 51(2):138-147
NIOSHTIC No.
20033456
Abstract
BACKGROUND: The job content questionnaire (JCQ) was administered to automobile manufacturing workers in two interviews, 5 years apart. Between the two interviews, the company introduced substantial changes in production technology in some production areas. The aims were: (1) to describe the impact of these changes on self-reported psychosocial exposures, and (2) to examine test-retest reliability of the JCQ scales, taking into account changes in job assignment and, for a subset of workers, physical ergonomic exposures as assessed through field observations. METHODS: The study population included 790 subjects at the first and 519 at the second interview, of whom 387 were present in both. Differences in demand and control scores between interviews were analyzed by Wilcoxon matched-pairs signed-rank test. Test-retest reliability of these scales was evaluated by the intraclass correlation coefficient (ICC) and the Spearman's rho coefficient. RESULTS: The introduction of more automated technology produced an overall increase in job control but did not decrease psychological demand. The reliability of the control scale was low overall but increased to an acceptable level among workers who had not changed job. The demand scale had high reliability only among workers whose physical ergonomic exposures were similar on both survey occasions. CONCLUSIONS: These results show that 5-year test-retest reliability of self-reported psychosocial exposures is adequate among workers whose job assignment and ergonomic exposures have remained stable over time.
Keywords
Ergonomics; Occupational-exposure; Workplace-studies; Risk-analysis; Work-analysis; Musculoskeletal-system-disorders; Biomechanics; Work-practices; Work-environment; Work-operations; Psychological-responses; Psychological-reactions; Questionnaires
Contact
Angelo d'Errico, Epidemiologic Unit, Piedmont Region, Via Sabaudia 164, Grugliasco (TO) 10095, Italy
CODEN
AJIMD8
Publication Date
20080201
Document Type
Journal Article
Email Address
angelo.derrico@epi.piemonte.it
Funding Type
Grant
Fiscal Year
2008
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003514
Issue of Publication
2
ISSN
0271-3586
Source Name
American Journal of Industrial Medicine
State
MA
Performing Organization
University of Massachusetts, Lowell
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