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Journal Article

Citation

Spector JT, Krenz J, Calkins M, Ryan D, Carmona J, Pan M, Zemke A, Sampson PD. Appl. Ergon. 2018; 67: 1-8.

Affiliation

Department of Statistics, University of Washington, Seattle, WA, USA. Electronic address: pds@u.washington.edu.

Copyright

(Copyright © 2018, Elsevier Publishing)

DOI

10.1016/j.apergo.2017.09.002

PMID

29122180

Abstract

BACKGROUND: We sought to evaluate potential mediators of the relationship between heat exposure and traumatic injuries in outdoor agricultural workers.

METHODS: Linear mixed models were used to estimate associations between maximum work-shift Wet Bulb Globe Temperature (WBGTmax) and post-shift vigilance (reaction time) and postural sway (total path length) in a cross-sectional sample of 46 Washington State tree fruit harvesters in August-September 2015.

RESULTS: The mean (SD) WBGTmax was 27.4 (3.2)°C in August and 21.2 (2.0)°C in September. The mean pre-work-shift participant urine specific gravity indicated minimal dehydration. Twenty-four percent of participants exhibited possible excessive sleepiness. There was no association between WBGTmax and post-shift reaction time or total path length.

CONCLUSIONS: Heat exposure was not associated with impaired vigilance or balance in this study, in which the overall mean (SD) WBGTmax was 25.9 (4.2)°C. However, the study identified opportunities to ensure adequate pre-work-shift hydration and to optimize sleep and work-shift timing in order to reduce occupational injury and heat-related illness risk.

Copyright © 2017 Elsevier Ltd. All rights reserved.


Language: en

Keywords

Heat exposure; Postural sway; Psychomotor vigilance

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