Heat Strain and Hydration Status of Surface Mine Blast Crew Workers

Hunt, Andrew P.; Parker, Anthony W.; Stewart, Ian B.

doi:10.1097/jom.0000000000000114

Cited by 23 publications

(28 citation statements)

References 32 publications

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“…A similar result was observed in Australian blast crew personal in surface mining, where 80% had a USG ≥1.020 upon commencing their shift and remained hypohydrated during and after work [27]. However, reference values for euhydration/hypohydration diagnosis are based on studies in athletes and military subjects to determine the effect of heat stress and its influence on performance [21].…”

Section: Discussionmentioning

confidence: 79%

Hydration Status and Kidney Health of Factory Workers Exposed to Heat Stress: A Pilot Feasibility Study

et al. 2019

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Dehydration associated with heat stress increases the risk of workplace injury or illness, decreases productivity, and may contribute to the chronic kidney disease epidemic identified in outdoor workers from hot climates. There is limited research on the effects of chronic occupational heat stress among indoor workers. We aimed to test the feasibility of measuring markers of hydration and kidney function in foundry factory workers in Southern Brazil, exposed and not exposed to heat stress. Factory workers exposed to heat stress (wet bulb globe temperature ≥28.9) and not exposed to heat were identified by management and invited to participate. Clinical and biochemical markers of hydration and kidney function were evaluated before and after a single 8.5 h work shift (lunch time not included). Feasibility outcomes included rates of enrolment, % completion of study protocols, and time to complete data collection. This study was deemed feasible with 80% enrolment and 90% completion of the protocol. Among the preselected workers, the enrolment rate was 91%. All subjects completed the physiological measures and blood collection and 95% completed the urine studies. Mean time to complete data collection pre-shift was 19.1 ± 4.2 min and post-shift: 14.3 ± 4.0 min. Workers exposed to heat stress had a greater decline in estimated glomerular filtration rate compared to controls over the work shift (–13 ± 11 vs. –5 ± 7 mL/min; p < 0.01). We demonstrated the feasibility and challenges of conducting future hydration and kidney function research among indoor factory workers. Further study is needed to determine if exposure to indoor heat contributes to a decline in kidney function.

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Section: Discussionmentioning

confidence: 79%

Hydration Status and Kidney Health of Factory Workers Exposed to Heat Stress: A Pilot Feasibility Study

et al. 2019

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“…For meta-analyses five and six, GRADE analysis revealed that the true effect is likely to be substantially different from the estimate of effect (very low confidence). Most (68%) 4,6,26,[33][34][35][39][40][41][42][43]45,46,[50][51][52][53][54][55]56,57, of the included studies incorporated low risk for selection bias, with the remaining studies presenting selection bias that was non-applicable (10%), 36, unclear (16%), 37,[47][48][49]118,[127][128][129][130][131][132] or, in some cases, high risk (6%) 5,38,44,133 due to acrossgroup variation in inclusion or exclusion criteria, and across-group differences in participant recruitment or selection. Most (61%) of the included studies incorporated low risk for confounding factors bias, with the remaining studies presenting confounding factor bias that was unclear (16%) 6 ,26,36,38,60,62,63,67,80,84,85,92,98-100,102,105,107-111,113,114,134-136 or high risk (23%) 33 ,35,37,44,45,47,49,59,66,74,83,86,89,91,94,96,118,127,128,132…”

Section: Resultsmentioning

confidence: 99%

Workers' health and productivity under occupational heat strain: a systematic review and meta-analysis

Flouris

Dinas

Ioannou

et al. 2018

The Lancet Planetary Health

294

233

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Background Occupational heat strain (ie, the effect of environmental heat stress on the body) directly threatens workers' ability to live healthy and productive lives. We estimated the effects of occupational heat strain on workers' health and productivity outcomes. Methods Following PRISMA guidelines for this systematic review and meta-analysis, we searched PubMed and Embase from database inception to Feb 5, 2018, for relevant studies in any labour environment and at any level of occupational heat strain. No restrictions on language, workers' health status, or study design were applied. Occupational heat strain was defined using international health and safety guidelines and standards. We excluded studies that calculated effects using simulations or statistical models instead of actual measurements, and any grey literature. Risk of bias, data extraction, and sensitivity analysis were performed by two independent investigators. Six random-effects meta-analyses estimated the prevalence of occupational heat strain, kidney disease or acute kidney injury, productivity loss, core temperature, change in urine specific gravity, and odds of occupational heat strain occurring during or at the end of a work shift in heat stress conditions. The review protocol is available on PROSPERO, registration number CRD42017083271. Findings Of 958 reports identified through our systematic search, 111 studies done in 30 countries, including 447 million workers from more than 40 different occupations, were eligible for analysis. Our meta-analyses showed that individuals working a single work shift under heat stress (defined as wet-bulb globe temperature beyond 22•0 or 24•8°C depending on work intensity) were 4•01 times (95% CI 2•45-6•58; nine studies with 11 582 workers) more likely to experience occupational heat strain than an individual working in thermoneutral conditions, while their core temperature was increased by 0•7°C (0•4-1•0; 17 studies with 1090 workers) and their urine specific gravity was increased by 14•5% (0•0031, 0•0014-0•0048; 14 studies with 691 workers). During or at the end of a work shift under heat stress, 35% (31-39; 33 studies with 13 088 workers) of workers experienced occupational heat strain, while 30% (21-39; 11 studies with 8076 workers) reported productivity losses. Finally, 15% (11-19; ten studies with 21 721 workers) of individuals who typically or frequently worked under heat stress (minimum of 6 h per day, 5 days per week, for 2 months of the year) experienced kidney disease or acute kidney injury. Overall, this analysis include a variety of populations, exposures, and occupations to comply with a wider adoption of evidence synthesis, but resulted in large heterogeneity in our meta-analyses. Grading of Recommendations, Assessment, Development and Evaluation analysis revealed moderate confidence for most results and very low confidence in two cases (average core temperature and change in urine specific gravity) due to studies being funded by industry. Interpretation Occupational heat strain has importan...

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“…25 In another study, which examines the state of dehydration and heat strain in fire workers in an open-pit mine, the mean radiant temperature measured 37.5°C and the average volume of urine obtained 1.024 according to the results, 73% of workers have been at least one of the symptoms of heatrelated illnesses in shift works. 26…”

Section: Introductionmentioning

confidence: 99%

The relation between heat strain and hydration status in the food industry employees in Mashhad, 2014

Bolghanabadi¹,

Mohammadi²,

Kohnavard³

et al. 2018

Pol. Ann. Med.

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Heat Strain and Hydration Status of Surface Mine Blast Crew Workers

Abstract: Core body temperature remained within the recommended limits; however, more than 80% of workers were dehydrated before commencing the shift, and tended to remain so for the duration.

Cited by 23 publications

References 32 publications

Hydration Status and Kidney Health of Factory Workers Exposed to Heat Stress: A Pilot Feasibility Study

Hydration Status and Kidney Health of Factory Workers Exposed to Heat Stress: A Pilot Feasibility Study

Workers' health and productivity under occupational heat strain: a systematic review and meta-analysis

The relation between heat strain and hydration status in the food industry employees in Mashhad, 2014

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