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Efficient methods for assessment of physical load at work
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Occupational and Environmental Medicine. (Arbets- och miljömedicin)ORCID iD: 0000-0001-9354-6704
2016 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2016. , 22 p.
National Category
Environmental Health and Occupational Health
Research subject
Occupational and Environmental Medicine
Identifiers
URN: urn:nbn:se:uu:diva-278965OAI: oai:DiVA.org:uu-278965DiVA: diva2:907276
Presentation
2016-03-11, Konferensrummet Arbets- och miljömedicin, Ulleråkersvägen 38-40, Uppsala, 10:00 (Swedish)
Supervisors
Funder
Swedish Retail and Wholesale Development Council, 2008:2Forte, Swedish Research Council for Health, Working Life and Welfare, 2012-1202
Available from: 2016-03-11 Created: 2016-02-26 Last updated: 2016-03-11Bibliographically approved
List of papers
1. Inter- and intra-observer reliability of risk assessment of repetitive work without an explicit method
Open this publication in new window or tab >>Inter- and intra-observer reliability of risk assessment of repetitive work without an explicit method
2017 (English)In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 62, 1-8 p.Article in journal (Refereed) Published
Abstract [en]

A common way to conduct practical risk assessments is to observe a job and report the observed long term risks for musculoskeletal disorders. The aim of this study was to evaluate the inter- and intra-observer reliability of ergonomists' risk assessments without the support of an explicit risk assessment method. Twenty-one experienced ergonomists assessed the risk level (low, moderate, high risk) of eight upper body regions, as well as the global risk of 10 video recorded work tasks. Intra-observer reliability was assessed by having nine of the ergonomists repeat the procedure at least three weeks after the first assessment. The ergonomists made their risk assessment based on his/her experience and knowledge. The statistical parameters of reliability included agreement in %, kappa, linearly weighted kappa, intraclass correlation and Kendall's coefficient of concordance. The average inter-observer agreement of the global risk was 53% and the corresponding weighted kappa (K-w) was 0.32, indicating fair reliability. The intra-observer agreement was 61% and 0.41 (K-w). This study indicates that risk assessments of the upper body, without the use of an explicit observational method, have non-acceptable reliability. It is therefore recommended to use systematic risk assessment methods to a higher degree.

Keyword
Inter-observer reliability, Intra-observer reliability, Risk assessment, Observational methods
National Category
Environmental Health and Occupational Health
Identifiers
urn:nbn:se:uu:diva-276859 (URN)10.1016/j.apergo.2017.02.004 (DOI)000401206600001 ()28411720 (PubMedID)
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 1212-1202
Note

Title in thesis list of papers: Inter- and intra-observer reliability of risk assessment of repetitive work without any specific method

Available from: 2016-02-16 Created: 2016-02-16 Last updated: 2017-10-19Bibliographically approved
2. Reliability and criterion validity of an observation protocol for working technique assessments in cash register work
Open this publication in new window or tab >>Reliability and criterion validity of an observation protocol for working technique assessments in cash register work
2016 (English)In: Ergonomics, ISSN 0014-0139, E-ISSN 1366-5847, Vol. 59, no 6, 829-839 p.Article in journal (Refereed) Published
Abstract [en]

We evaluated the intra- and inter-observer reliability and criterion validity of an observation protocol, developed in an iterative process involving practicing ergonomists, for assessment of working technique during cash register work for the purpose of preventing upper extremity symptoms. Two ergonomists independently assessed 17 15-min videos of cash register work on two occasions each, as a basis for examining reliability. Criterion validity was assessed by comparing these assessments with meticulous video-based analyses by researchers. Intra-observer reliability was acceptable (i.e. proportional agreement >0.7 and kappa >0.4) for 10/10 questions. Inter-observer reliability was acceptable for only 3/10 questions. An acceptable inter-observer reliability combined with an acceptable criterion validity was obtained only for one working technique aspect, 'Quality of movements'. Thus, major elements of the cashiers' working technique could not be assessed with an acceptable accuracy from short periods of observations by one observer, such as often desired by practitioners. Practitioner Summary: We examined an observation protocol for assessing working technique in cash register work. It was feasible in use, but inter-observer reliability and criterion validity were generally not acceptable when working technique aspects were assessed from short periods of work. We recommend the protocol to be used for educational purposes only.

Keyword
Repetitivt arbete, muskeloskeletala besvär
National Category
Other Medical Sciences not elsewhere specified Environmental Health and Occupational Health
Identifiers
urn:nbn:se:uu:diva-276838 (URN)10.1080/00140139.2015.1098734 (DOI)000380150600010 ()26538287 (PubMedID)
Funder
Swedish Retail and Wholesale Development Council, 2008:2
Available from: 2016-02-16 Created: 2016-02-16 Last updated: 2017-10-19

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