Impact of Temperature in Summer on Emergency Transportation for Heat-Related Diseases in Japan

Ito, Yukie; Akahane, Manabu; Imamura, Tomoaki

doi:10.4103/0366-6999.226061

Cited by 15 publications

(10 citation statements)

References 32 publications

(35 reference statements)

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“…22 Physical function development in children is immature, making them more susceptible to heat stress. 8 In the adult age group, the number of male cases per 1,000 residents was three times greater than the number of female cases. This pattern may be tied to the fact that men engage in more outdoor activities than females, even on days with high temperatures.…”

Section: Discussionmentioning

confidence: 92%

“…These findings are consistent with those of previous studies. 8,[19][20][21] Children and elderly adults are particularly vulnerable to heat stress, and we found an elevated number of ATHS cases involving these populations. One reason for increased vulnerability to heat among elderly people is their reduced heat dissipation capacity as a result of decreased skin blood flow, decreased sweat gland function, depletion of body fluids, and decreased cardiac output.…”

Section: Discussionmentioning

confidence: 99%

“…1 In Japan, there have been studies of the relationship between ambulance transports owing to heat stroke (ATHS) and high air temperature in the summer season. [2][3][4][5][6][7][8] These studies have reported a strong correlation between ATHS and daily maximum temperature.…”

mentioning

confidence: 94%

“…10 Most previous studies have focused on ATHS and high air temperatures in the summer. [2][3][4][5][6][7][8] There have been very few reports focusing on heat stroke during the spring. The seasonal mean temperatures in spring have risen at rates of about 1.4ºC per century.…”

mentioning

confidence: 99%

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Impact of Maximum Air Temperature on Ambulance Transports Owing to Heat Stroke During Spring and Summer in Tottori Prefecture, Japan: A Time-stratified Case-crossover Analysis

et al. 2019

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Background The frequency and intensity of hot weather have increased. In Japan, there have been many studies of the relationship between ambulance transports owing to heat stroke (ATHS) and high air temperature in the summer season. However, there have been very few reports focusing on ATHS in spring. Therefore, we investigated the effect of the maximum air temperature on ATHS not only in summer but also in spring, to help with development of effective measures to prevent heat stroke. Methods We obtained daily ATHS and meteorological data from April to September in 2017 in Tottori Prefecture. We used a time-stratified case-crossover method for data analysis. Results A total 382 cases of ATHS were identified from April to September in 2017 in Tottori. The number of cases was highest in July, followed by August and May. Maximum air temperature was significantly linked to ATHS. The risk of ATHS was increased 1.13 times when maximum air temperature rose by 1°C. In summer, the risk on extremely hot days (maximum air temperature ≥ 35°C) increased by 5.55 times or more compared with that on days below 30 °C (< 30°C). The risk was approximately four times greater on hot days (≥ 30°C and < 35°C) than that on relatively cooler days (< 30°C) during the spring months of April through May. Conclusion Maximum air temperature was significantly linked to ATHS. It is necessary to pay particular attention to heat stroke prevention not only on extremely hot days in summer but also on hot days in the spring.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 94%

mentioning

confidence: 99%

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Impact of Maximum Air Temperature on Ambulance Transports Owing to Heat Stroke During Spring and Summer in Tottori Prefecture, Japan: A Time-stratified Case-crossover Analysis

et al. 2019

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“…A number of studies have been conducted on the relationship between maximum temperatures and heat strokes, reporting a strong correlation [ 6 , 7 , 8 , 9 , 10 , 11 ]. We previously noted a strong correlation between maximum temperatures and the number of emergency transports for heat strokes and were able to quantify the risk by temperature [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Minimum and Maximum Air Temperatures in the Summer on Heat Stroke in Japan: A Time-Stratified Case-Crossover Study

Otani

Ishizu

Masumoto

et al. 2021

IJERPH

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An increase in the global surface temperature and changes in urban morphologies are associated with increased heat stress especially in urban areas. This can be one of the contributing factors underlying an increase in heat strokes. We examined the impact of summer minimum air temperatures, which often represent nighttime temperatures, as well as a maximum temperature on a heat stroke. We collected data from the records of daily ambulance transports for heat strokes and meteorological data for July and August of 2017–2019 in the Tottori Prefecture, Japan. A time-stratified case-crossover design was used to determine the association of maximum/minimum air temperatures and the incidence of heat strokes. We used a logistic regression to identify factors associated with the severity of heat strokes. A total of 1108 cases were identified with 373 (33.7%) calls originating in the home (of these, 59.8% were the age of ≥ 75). A total of 65.8% of cases under the age of 18 were related to exercise. Days with a minimum temperature ≥ 25 °C had an odds ratio (95% confidence interval) of 3.77 (2.19, 6.51) for the incidence of an exercise-related heat stroke (reference: days with a minimum temperature < 23 °C). The odds ratio for a heat stroke occurring at home or for calls for an ambulance to the home was 6.75 (4.47, 10.20). The severity of the heat stroke was associated with older age but not with air temperature. Minimum and maximum air temperatures may be associated with the incidence of heat strokes and in particular the former with non-exertional heat strokes.

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Association between ambient temperature and ambulance dispatch: a systematic review and meta-analysis

et al. 2022

Environ Sci Pollut Res

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Impact of Temperature in Summer on Emergency Transportation for Heat-Related Diseases in Japan

Cited by 15 publications

References 32 publications

Impact of Maximum Air Temperature on Ambulance Transports Owing to Heat Stroke During Spring and Summer in Tottori Prefecture, Japan: A Time-stratified Case-crossover Analysis

Impact of Maximum Air Temperature on Ambulance Transports Owing to Heat Stroke During Spring and Summer in Tottori Prefecture, Japan: A Time-stratified Case-crossover Analysis

The Effect of Minimum and Maximum Air Temperatures in the Summer on Heat Stroke in Japan: A Time-Stratified Case-Crossover Study

Association between ambient temperature and ambulance dispatch: a systematic review and meta-analysis

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