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International Journal of Occupational Hygiene، جلد ۶، شماره ۳، صفحات ۱۴۳-۱۴۸
عنوان فارسی
چکیده فارسی مقاله
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عنوان انگلیسی Productivity Loss from Occupational Exposure to Heat Stress: A Case Study in Brick Workshops/Qom-Iran
چکیده انگلیسی مقاله Heat stress particularly at outdoor workplaces in hot-dry climates can disrupt the physical or mental functions and effect negatively on human performance. We aimed to study the effect of heat stress on productivity loss among workers of brick workshops in Qom Province – central Iran. This cross-sectional descriptive and analytic study was performed on 184 workers in 40 brick workshops. Environmental parameters including dry temperature, natural wet-bulb temperature, globe temperature, relative humidity and air velocity were measured at three times during work shift. WBGT (Wet Bulb Globe Temperature) heat stress index was calculated based on equation provided by Australian Bureau of Meteorology. Potential labor productivity losses due to heat stress were determined using a graph presented already. The total average of WBGT was 31.84±3.46°C. WBGT index according to different jobs was 39.48±8.2°C, 29.86±2.79°C, 29.31±0.97°C and 28.69±1.89°C for working in kiln, material handling, working on conveyor and making adobe, respectively. The average loss productivity in mentioned tasks was 93.57±16.54, 66.58±20.58, 65.53±15.26 and 48.27±13.04 respectively, with total average of productivity loss 68.48±16.35%. The statistically significant relationships were found between WBGT values and percentage of loss productivity in total and for all understudy jobs ( p < 0.001). Heat stress can lead to decrease in labor productivity at outdoor workplaces like brick industries. According to climate change in the future and gradual global warming, paying more attention to the occupational health issues in outdoor workplaces at dry and warm environment seems to be more important than before.
کلیدواژه‌های انگلیسی مقاله Loss of Productivity,Heat Stress,WBGT,Brick Workshops
نویسندگان مقاله روح اله حاجی زاده | roohalah hajizadeh
department of occupational health engineering, faculty of health, tehran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

فریده گلبابایی | farideh golbabaei
department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

محمدرضا منظم | mohammadreza monazzam
associate professor, department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

سمیه فرهنگ دهقان | somayeh farhang dehghan
department of occupational health engineering, , school of public health, tehran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

اسماعیل ایزدی نوان | esmail ezadi navan
department of occupational health engineering, faculty of health, shahid beheshti university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (Shahid beheshti university of medical sciences)

نشانی اینترنتی http://ijoh.tums.ac.ir/index.php/ijoh/article/view/111
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