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2. Correlations between Ratings and Technical Measurements in Hand-Intensive Work

Author

Dahlgren, Gunilla, Liv, Per, Ohberg, Fredrik, Jarvholm, Lisbeth Slunga, Forsman, Mikael, Rehn, Borje, Dahlgren, Gunilla, Liv, Per, Ohberg, Fredrik, Jarvholm, Lisbeth Slunga, Forsman, Mikael, and Rehn, Borje

Abstract

An accurate rating of hand activity and force is essential in risk assessment and for the effective prevention of work-related musculoskeletal disorders. However, it is unclear whether the subjective ratings of workers and observers correlate to corresponding objective technical measures of exposure. Fifty-nine workers were video recorded while performing a hand-intensive work task at their workplace. Self-ratings of hand activity level (HAL) and force (Borg CR10) using the Hand Activity Threshold Limit Value(& REG;) were assessed. Four ergonomist observers, in two pairs, also rated the hand activity and force level for each worker from video recordings. Wrist angular velocity was measured using inertial movement units. Muscle activity in the forearm muscles flexor carpi radialis (FCR) and extensor carpi radialis (ECR) was measured with electromyography root mean square values (RMS) and normalized to maximal voluntary electrical activation (MVE). Kendall's tau-b correlations were statistically significant between self-rated hand activity and wrist angular velocity at the 10th, 50th, and 90th percentiles (0.26, 0.31, and 0.23) and for the ratings of observers (0.32, 0.41, and 0.34). Significant correlations for force measures were found only for observer-ratings in five of eight measures (FCR 50th percentile 0.29, time > 10%MVE 0.43, time > 30%MVE 0.44, time < 5% -0.47) and ECR (time > 30%MVE 0.26). The higher magnitude of correlation for observer-ratings suggests that they may be preferred to the self-ratings of workers. When possible, objective technical measures of wrist angular velocity and muscle activity should be preferred to subjective ratings when assessing risks of work-related musculoskeletal disorders., QC 20230810

Published
2023
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6. Hand-arm vibration syndrome (HAVS) and musculoskeletal symptoms in the neck and the upper limbs in professional drivers of terrain vehicles -- A cross sectional study

Author

Astrom, Charlotte, Rehn, BoRje, Lundstrom, Ronnie, Nilsson, Tohr, Burstrom, Lage, and Sundelin, Gunnevi

Subjects
Automobile drivers -- Physiological aspects, Automobile drivers -- Health aspects, Vibration syndrome -- Diagnosis, Prevalence studies (Epidemiology), Engineering and manufacturing industries, Health, Human resources and labor relations
Abstract

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.apergo.2005.09.004 Byline: Charlotte Astrom (a), Borje Rehn (a), Ronnie Lundstrom (b), Tohr Nilsson (c), Lage Burstrom (d), Gunnevi Sundelin (a) Keywords: Epidemiology; Hand-arm vibration; Whole-body vibration Abstract: This study compares the prevalence of symptoms of Hand-arm vibration syndrome (HAVS) and musculoskeletal symptoms in the neck and the upper limbs, between professional drivers of terrain vehicles and a referent group. 769 male professional drivers of forest machines, snowmobiles, snowgroomers and reindeer herders and 296 randomly selected male referents completed a questionnaire about symptoms of HAVS and musculoskeletal symptoms in the neck and the upper limbs. They also gave information about their lifetime exposure duration driving terrain vehicles and their nicotine use. Prevalence odds ratios (POR) were determined and adjusted for age and nicotine use. Results show that there is a relation between exposure to driving terrain vehicles and some of the symptoms of HAVS (POR: 1.2-6.1). Increased odds of musculoskeletal symptoms in neck, shoulders and wrists were also found (POR 1.2-6.4), and it seemed to be related to the cumulative exposure time. Author Affiliation: (a) Department of Community Medicine and Rehabilitation, Physiotherapy, UmeA[yen] University, SE-901 87 UmeA[yen], Sweden (b) Department of Public Health and Clinical Medicine, Occupational Medicine, UmeA[yen] University, SE-901 87 UmeA[yen], Sweden (c) Department of Occupational and Environmental Medicine, Sundsvall Hospital, SE-851 86 Sundsvall, Sweden (d) National Institute for Working Life, SE-907 13 UmeA[yen], Sweden Article History: Received 1 March 2005; Accepted 15 September 2005

Published
2006

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