The risk of heat exhaustion at a deep underground metalliferous mine in relation to body-mass index and predicted VO2max.
The risk of heat exhaustion at a deep underground metalliferous mine was assessed in relation to the body-mass index (BMI) and predicted maximal oxygen uptake (VO2max) of miners, using case-control methodology. Sixty-five cases of acute heat exhaustion and 119 controls were studied. Heat exhaustion cases had a significantly higher BMI than controls (P = 0.006). The odds ratios increased with BMI. For a BMI of 32.00-36.99, compared to a BMI of less than 27.00 the odds ratio was 3.63 (95% confidence interval, 1.42-9.36). VO2max was not significantly lower in cases than controls. The odds ratios for heat exhaustion increased with decreasing VO2max, but not significantly. The sample size provided 80% power of detecting an odds ratio of 2.5 or greater. Deep underground miners should be advised to maintain a BMI of 24-27. Selection of miners on the basis of BMI should not be used as an alternative to satisfactory engineering controls such as ventilation and refrigeration.
Donoghue
A M
AM
Minerals Industry Safety and Health Centre, University of Queensland, Brisbane, Australia. a.m.donoghue@minmet.uq.edu.au
Bates
G P
GP
D000328:Adult; D001315:Australia / Q000453:epidemiology; D015992:Body Mass Index; D016022:Case-Control Studies; D006359:Heat Exhaustion / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D008297:Male; D008669:Metallurgy; D008906:Mining; D016273:Occupational Exposure / Q000009:adverse effects*; D010101:Oxygen Consumption; D010809:Physical Fitness; D018570:Risk Assessment