Risk factors for heatstroke among Japanese forestry workers

Takafumi Maeda, Shin Ya Kaneko, Mitsuhiro Ohta, Kazuko Tanaka, Akihiko Sasaki, Tetsuhito Fukushima

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

We examined the risk factors for heatstroke among forestry workers in Japan during the summer. We distributed a questionnaire to 124 forestry workers to determine heatstroke symptoms, degree of sweating and hydration, as well as perceived hotness and amount of sunlight at work sites. Forty of the workers (32.3%) reported experiencing heatstroke symptoms. Thirteen and 21 of them reported such symptoms during July and August, respectively. Eleven workers experienced heatstroke at around 14:00; 5 and 4 developed symptoms at around 11:00 and 10:00, respectively. Groups with and without heatstroke symptoms significantly differed in terms of perceived hotness ( p<0.05), sunlight ( p<0.05), degree of sweating ( p<0.01) and frequency of hydration ( p<0.05) while working. Heatstroke symptoms developed in 60.6% of workers aged up to 50 yr, but in only 22.0% of those over the age of 51 ( p<0.01). Multiple regression analysis selected the following key variables associated with the development of heatstroke symptoms (R2=0.236 and p=0.006): frequency of urination, hotness, BMI and years of forestry work (standard coefficients: +0.229, +0.194, +0.280 and -0.162, respectively). The results of the present study showed that one third of forestry workers developed some symptoms of early heatstroke during summer forestry work. Furthermore, the results indicate that a short duration of forestry service was one of the risk factors contributing to the onset of heatstroke, in addition to heat stress, loss of body water and electrolytes, and obesity.

Original languageEnglish
Pages (from-to)223-229
Number of pages7
JournalJournal of Occupational Health
Volume48
Issue number4
DOIs
Publication statusPublished - Jul 1 2006

Fingerprint

Heat Stroke
Forestry
Sweating
Sunlight
Body Water
Urination
Workplace
Electrolytes
Japan
Obesity
Hot Temperature
Regression Analysis

All Science Journal Classification (ASJC) codes

  • Public Health, Environmental and Occupational Health

Cite this

Maeda, T., Kaneko, S. Y., Ohta, M., Tanaka, K., Sasaki, A., & Fukushima, T. (2006). Risk factors for heatstroke among Japanese forestry workers. Journal of Occupational Health, 48(4), 223-229. https://doi.org/10.1539/joh.48.223

Risk factors for heatstroke among Japanese forestry workers. / Maeda, Takafumi; Kaneko, Shin Ya; Ohta, Mitsuhiro; Tanaka, Kazuko; Sasaki, Akihiko; Fukushima, Tetsuhito.

In: Journal of Occupational Health, Vol. 48, No. 4, 01.07.2006, p. 223-229.

Research output: Contribution to journalArticle

Maeda, T, Kaneko, SY, Ohta, M, Tanaka, K, Sasaki, A & Fukushima, T 2006, 'Risk factors for heatstroke among Japanese forestry workers', Journal of Occupational Health, vol. 48, no. 4, pp. 223-229. https://doi.org/10.1539/joh.48.223
Maeda, Takafumi ; Kaneko, Shin Ya ; Ohta, Mitsuhiro ; Tanaka, Kazuko ; Sasaki, Akihiko ; Fukushima, Tetsuhito. / Risk factors for heatstroke among Japanese forestry workers. In: Journal of Occupational Health. 2006 ; Vol. 48, No. 4. pp. 223-229.
@article{d14bbd38c333464b8b4cad43246676fc,
title = "Risk factors for heatstroke among Japanese forestry workers",
abstract = "We examined the risk factors for heatstroke among forestry workers in Japan during the summer. We distributed a questionnaire to 124 forestry workers to determine heatstroke symptoms, degree of sweating and hydration, as well as perceived hotness and amount of sunlight at work sites. Forty of the workers (32.3{\%}) reported experiencing heatstroke symptoms. Thirteen and 21 of them reported such symptoms during July and August, respectively. Eleven workers experienced heatstroke at around 14:00; 5 and 4 developed symptoms at around 11:00 and 10:00, respectively. Groups with and without heatstroke symptoms significantly differed in terms of perceived hotness ( p<0.05), sunlight ( p<0.05), degree of sweating ( p<0.01) and frequency of hydration ( p<0.05) while working. Heatstroke symptoms developed in 60.6{\%} of workers aged up to 50 yr, but in only 22.0{\%} of those over the age of 51 ( p<0.01). Multiple regression analysis selected the following key variables associated with the development of heatstroke symptoms (R2=0.236 and p=0.006): frequency of urination, hotness, BMI and years of forestry work (standard coefficients: +0.229, +0.194, +0.280 and -0.162, respectively). The results of the present study showed that one third of forestry workers developed some symptoms of early heatstroke during summer forestry work. Furthermore, the results indicate that a short duration of forestry service was one of the risk factors contributing to the onset of heatstroke, in addition to heat stress, loss of body water and electrolytes, and obesity.",
author = "Takafumi Maeda and Kaneko, {Shin Ya} and Mitsuhiro Ohta and Kazuko Tanaka and Akihiko Sasaki and Tetsuhito Fukushima",
year = "2006",
month = "7",
day = "1",
doi = "10.1539/joh.48.223",
language = "English",
volume = "48",
pages = "223--229",
journal = "Journal of Occupational Health",
issn = "1341-9145",
publisher = "Japan Society for Occupational Health",
number = "4",

}

TY - JOUR

T1 - Risk factors for heatstroke among Japanese forestry workers

AU - Maeda, Takafumi

AU - Kaneko, Shin Ya

AU - Ohta, Mitsuhiro

AU - Tanaka, Kazuko

AU - Sasaki, Akihiko

AU - Fukushima, Tetsuhito

PY - 2006/7/1

Y1 - 2006/7/1

N2 - We examined the risk factors for heatstroke among forestry workers in Japan during the summer. We distributed a questionnaire to 124 forestry workers to determine heatstroke symptoms, degree of sweating and hydration, as well as perceived hotness and amount of sunlight at work sites. Forty of the workers (32.3%) reported experiencing heatstroke symptoms. Thirteen and 21 of them reported such symptoms during July and August, respectively. Eleven workers experienced heatstroke at around 14:00; 5 and 4 developed symptoms at around 11:00 and 10:00, respectively. Groups with and without heatstroke symptoms significantly differed in terms of perceived hotness ( p<0.05), sunlight ( p<0.05), degree of sweating ( p<0.01) and frequency of hydration ( p<0.05) while working. Heatstroke symptoms developed in 60.6% of workers aged up to 50 yr, but in only 22.0% of those over the age of 51 ( p<0.01). Multiple regression analysis selected the following key variables associated with the development of heatstroke symptoms (R2=0.236 and p=0.006): frequency of urination, hotness, BMI and years of forestry work (standard coefficients: +0.229, +0.194, +0.280 and -0.162, respectively). The results of the present study showed that one third of forestry workers developed some symptoms of early heatstroke during summer forestry work. Furthermore, the results indicate that a short duration of forestry service was one of the risk factors contributing to the onset of heatstroke, in addition to heat stress, loss of body water and electrolytes, and obesity.

AB - We examined the risk factors for heatstroke among forestry workers in Japan during the summer. We distributed a questionnaire to 124 forestry workers to determine heatstroke symptoms, degree of sweating and hydration, as well as perceived hotness and amount of sunlight at work sites. Forty of the workers (32.3%) reported experiencing heatstroke symptoms. Thirteen and 21 of them reported such symptoms during July and August, respectively. Eleven workers experienced heatstroke at around 14:00; 5 and 4 developed symptoms at around 11:00 and 10:00, respectively. Groups with and without heatstroke symptoms significantly differed in terms of perceived hotness ( p<0.05), sunlight ( p<0.05), degree of sweating ( p<0.01) and frequency of hydration ( p<0.05) while working. Heatstroke symptoms developed in 60.6% of workers aged up to 50 yr, but in only 22.0% of those over the age of 51 ( p<0.01). Multiple regression analysis selected the following key variables associated with the development of heatstroke symptoms (R2=0.236 and p=0.006): frequency of urination, hotness, BMI and years of forestry work (standard coefficients: +0.229, +0.194, +0.280 and -0.162, respectively). The results of the present study showed that one third of forestry workers developed some symptoms of early heatstroke during summer forestry work. Furthermore, the results indicate that a short duration of forestry service was one of the risk factors contributing to the onset of heatstroke, in addition to heat stress, loss of body water and electrolytes, and obesity.

UR - http://www.scopus.com/inward/record.url?scp=33750515046&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33750515046&partnerID=8YFLogxK

U2 - 10.1539/joh.48.223

DO - 10.1539/joh.48.223

M3 - Article

VL - 48

SP - 223

EP - 229

JO - Journal of Occupational Health

JF - Journal of Occupational Health

SN - 1341-9145

IS - 4

ER -