VALIDATING THE HEAT STRESS INDICES FOR USING IN HEAVY WORK ACTIVITIES IN HOT AND DRY CLIMATES

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HAJIZADEH ROOHALAH; GOLBABAEI FARIDEH; FARHANG DEHGHAN SOMAYEH; BEHESHTI MOHAMMAD HOSSEIN; JAFARI SAYED MOHAMMAD; TAHERI FERESHTEH

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Journal: JOURNAL OF RESEARCH IN HEALTH SCIENCES (JRHS) Year:2016 | Volume:16 | Issue:2 Page(s): 90-95

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Title

VALIDATING THE HEAT STRESS INDICES FOR USING IN HEAVY WORK ACTIVITIES IN HOT AND DRY CLIMATES

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Keywords

HEAT STRESS INDEX

PHYSIOLOGICAL RESPONSES

ENVIRONMENTAL PARAMETERS

VALIDATION

Abstract

Background: Necessity of evaluating heat stress in the workplace, require VALIDATION of indices and selection optimal index. The present study aimed to assess the precision and validity of some heat stress indices and select the optimum index for using in heavy work activities in hot and dry climates.Methods: It carried out on 184 workers from 40 brick kilns workshops in the city of Qom, central Iran (as representative hot and dry climates). After reviewing the working process and evaluation the activity of workers and the type of work, environmental and physiological parameters according to standards recommended by International Organization for Standardization (ISO) including ISO 7243 and ISO 9886 were measured and indices were calculated.Results: Workers engaged in indoor kiln experienced the highest values of natural wet temperature, dry temperature, globe temperature and relative humidity among studied sections (P<0.05). Indoor workplaces had the higher levels of all ENVIRONMENTAL PARAMETERS than outdoors (P=0.0001), except for air velocity. The wet-bulb globe temperature (WBGT), predicted heat strain (PHS) and HEAT STRESS INDEX (HSI) indices had the highest correlation with the physiological parameters. Relationship between WBGT index and carotid artery temperature (r=0.49), skin temperature (r=0.319), and oral temperature (r=0.203) was statistically significant (P=0.006).Conclusions: Since WBGT index, as the most applicable index for evaluating heat stress in workplaces is approved by ISO, and due to the positive features of WBGT such as ease of measurement and calculation, and with respect to some limitation in application of HSI; WBGT can be introduced as the most valid empirical index of heat stress in the brick workshops.

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APA: Copy

HAJIZADEH, ROOHALAH, GOLBABAEI, FARIDEH, FARHANG DEHGHAN, SOMAYEH, BEHESHTI, MOHAMMAD HOSSEIN, JAFARI, SAYED MOHAMMAD, & TAHERI, FERESHTEH. (2016). VALIDATING THE HEAT STRESS INDICES FOR USING IN HEAVY WORK ACTIVITIES IN HOT AND DRY CLIMATES. JOURNAL OF RESEARCH IN HEALTH SCIENCES (JRHS), 16(2), 90-95. SID. https://sid.ir/paper/301477/en

Vancouver: Copy

HAJIZADEH ROOHALAH, GOLBABAEI FARIDEH, FARHANG DEHGHAN SOMAYEH, BEHESHTI MOHAMMAD HOSSEIN, JAFARI SAYED MOHAMMAD, TAHERI FERESHTEH. VALIDATING THE HEAT STRESS INDICES FOR USING IN HEAVY WORK ACTIVITIES IN HOT AND DRY CLIMATES. JOURNAL OF RESEARCH IN HEALTH SCIENCES (JRHS)[Internet]. 2016;16(2):90-95. Available from: https://sid.ir/paper/301477/en

IEEE: Copy

ROOHALAH HAJIZADEH, FARIDEH GOLBABAEI, SOMAYEH FARHANG DEHGHAN, MOHAMMAD HOSSEIN BEHESHTI, SAYED MOHAMMAD JAFARI, and FERESHTEH TAHERI, “VALIDATING THE HEAT STRESS INDICES FOR USING IN HEAVY WORK ACTIVITIES IN HOT AND DRY CLIMATES,” JOURNAL OF RESEARCH IN HEALTH SCIENCES (JRHS), vol. 16, no. 2, pp. 90–95, 2016, [Online]. Available: https://sid.ir/paper/301477/en

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