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Extreme hot weather mortality

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https://www.readbyqxmd.com/read/27846897/a-proposed-case-control-framework-to-probabilistically-classify-individual-deaths-as-expected-or-excess-during-extreme-hot-weather-events
#1
Sarah B Henderson, Jillian S Gauld, Stephen A Rauch, Kathleen E McLean, Nikolas Krstic, David M Hondula, Tom Kosatsky
BACKGROUND: Most excess deaths that occur during extreme hot weather events do not have natural heat recorded as an underlying or contributing cause. This study aims to identify the specific individuals who died because of hot weather using only secondary data. A novel approach was developed in which the expected number of deaths was repeatedly sampled from all deaths that occurred during a hot weather event, and compared with deaths during a control period. The deaths were compared with respect to five factors known to be associated with hot weather mortality...
November 15, 2016: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/27346526/delineation-of-spatial-variability-in-the-temperature-mortality-relationship-on-extremely-hot-days-in-greater-vancouver-canada
#2
Hung Chak Ho, Anders Knudby, Blake Byron Walker, Sarah B Henderson
BACKGROUND: Climate change has increased the frequency and intensity of extremely hot weather. The health risks are not uniform across affected areas due to variability in heat exposure and social vulnerability, but these differences are challenging to map with precision. OBJECTIVES: To develop a spatially- and temporally-stratified case-crossover approach for delineation of areas with higher and lower risk of mortality on extremely hot days, and to apply it in greater Vancouver, Canada...
June 27, 2016: Environmental Health Perspectives
https://www.readbyqxmd.com/read/27044873/the-ability-of-white-leghorn-hens-with-trimmed-comb-and-wattles-to-thermoregulate
#3
D S Al-Ramamneh, M M Makagon, P Y Hester
It is estimated that each year over 19 million pullets in the United States have their combs partially trimmed at a young age to improve egg production and feed efficiency. A possible disadvantage of trimming is that the comb and wattles may be essential for thermoregulation during hot weather allowing for conductive cooling of the blood through vasodilation of superficial vessels in these integumentary tissues. The objective of this study was to investigate the effects of partial comb and wattle removal, performed at 21 d of age, on the ability of White Leghorns to thermoregulate before, during, and after an imposed heating episode that averaged 34...
August 1, 2016: Poultry Science
https://www.readbyqxmd.com/read/26005951/quantifying-the-influence-of-ambient-temperature-on-dairy-and-beef-cattle-mortality-in-france-from-a-time-series-analysis
#4
Eric Morignat, Emilie Gay, Jean-Luc Vinard, Didier Calavas, Viviane Hénaux
In the context of climate change, the frequency and severity of extreme weather events are expected to increase in temperate regions, and potentially have a severe impact on farmed cattle through production losses or deaths. In this study, we used distributed lag non-linear models to describe and quantify the relationship between a temperature-humidity index (THI) and cattle mortality in 12 areas in France. THI incorporates the effects of both temperature and relative humidity and was already used to quantify the degree of heat stress on dairy cattle because it does reflect physical stress deriving from extreme conditions better than air temperature alone...
July 2015: Environmental Research
https://www.readbyqxmd.com/read/26003380/mortality-risk-attributable-to-high-and-low-ambient-temperature-a-multicountry-observational-study
#5
MULTICENTER STUDY
Antonio Gasparrini, Yuming Guo, Masahiro Hashizume, Eric Lavigne, Antonella Zanobetti, Joel Schwartz, Aurelio Tobias, Shilu Tong, Joacim Rocklöv, Bertil Forsberg, Michela Leone, Manuela De Sario, Michelle L Bell, Yue-Liang Leon Guo, Chang-fu Wu, Haidong Kan, Seung-Muk Yi, Micheline de Sousa Zanotti Stagliorio Coelho, Paulo Hilario Nascimento Saldiva, Yasushi Honda, Ho Kim, Ben Armstrong
BACKGROUND: Although studies have provided estimates of premature deaths attributable to either heat or cold in selected countries, none has so far offered a systematic assessment across the whole temperature range in populations exposed to different climates. We aimed to quantify the total mortality burden attributable to non-optimum ambient temperature, and the relative contributions from heat and cold and from moderate and extreme temperatures. METHODS: We collected data for 384 locations in Australia, Brazil, Canada, China, Italy, Japan, South Korea, Spain, Sweden, Taiwan, Thailand, UK, and USA...
July 25, 2015: Lancet
https://www.readbyqxmd.com/read/25748025/ambient-heat-and-sudden-infant-death-a-case-crossover-study-spanning-30-years-in-montreal-canada
#6
Nathalie Auger, William D Fraser, Audrey Smargiassi, Tom Kosatsky
BACKGROUND: Climate change may lead to more severe and extreme heat waves in the future, but its potential impact on sudden infant death-a leading cause of infant mortality-is unclear. OBJECTIVES: We sought to determine whether risk of sudden infant death syndrome (SIDS) is elevated during hot weather. METHODS: We undertook a case-crossover analysis of all sudden infant deaths during warm periods in metropolitan Montreal, Quebec, Canada, from 1981 through 2010...
July 2015: Environmental Health Perspectives
https://www.readbyqxmd.com/read/25643105/mortality-related-to-extreme-temperature-for-15-cities-in-northeast-asia
#7
Yeonseung Chung, Youn-Hee Lim, Yasushi Honda, Yue-Liang Leon Guo, Masahiro Hashizume, Michelle L Bell, Bing-Yu Chen, Ho Kim
BACKGROUND: Multisite time-series studies for temperature-related mortality have been conducted mainly in the United States and Europe, but are lacking in Asia. This multisite time-series study examined mortality related to extreme temperatures (both cold and hot) in Northeast Asia, focusing on 15 cities of 3 high-income countries. METHODS: This study includes 3 cities in Taiwan for 1994-2007, 6 cities in Korea for 1992-2010, and 6 cities in Japan for 1972-2009...
March 2015: Epidemiology
https://www.readbyqxmd.com/read/25511886/the-effect-of-temperature-on-cardiovascular-disease-hospital-admissions-among-elderly-people-in-thai-nguyen-province-vietnam
#8
Pham Ngan Giang, Do Van Dung, Kim Bao Giang, Hac Van Vinhc, Joacim Rocklöv
BACKGROUND: Projected increases in weather variability due to climate change will have severe consequences on human health, increasing mortality, and disease rates. Among these, cardiovascular diseases (CVD), highly prevalent among the elderly, have been shown to be sensitive to extreme temperatures and heat waves. OBJECTIVES: This study aimed to find out the relationship between daily temperature (and other weather parameters) and daily CVD hospital admissions among the elderly population in Thai Nguyen province, a northern province of Vietnam...
2014: Global Health Action
https://www.readbyqxmd.com/read/25174472/-impact-of-temperature-on-non-accidental-deaths-and-cause-specific-mortality-in-four-districts-of-jinan
#9
Mengmeng Li, Maigeng Zhou, Xia Zhang, Jixia Huang, Li Bai, Shaowei Sang, Ji Zhang, Qiyong Liu
OBJECTIVE: To study the relationship between daily temperature and non-accidental deaths in four districts of Jinan, and to investigate the impact of temperature on cause-specific mortality. METHODS: Data on daily mortality of the four districts (Shizhong, Huaiyin, Tianqiao, Lixia) as well as data related to meteorology and air pollution index were collected from January 1, 2008 to December 31, 2012. Distributed lag non-linear model (DLNM) was then used to assess the effects of temperature on all non-accidental deaths and deaths caused by cardiovascular diseases (CVD), respiratory diseases (RD), digestive diseases, urinary diseases, and also subcategories to hypertension, ischemic heart diseases (IHD), acute myocardial infarction (AMI), cerebro-vascular diseases (CBD) and chronic lower respiratory diseases...
June 2014: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/25086705/extremely-cold-and-hot-temperatures-increase-the-risk-of-diabetes-mortality-in-metropolitan-areas-of-two-chinese-cities
#10
Yonghong Li, Li Lan, Yulin Wang, Chao Yang, Wenge Tang, Guoquan Cui, Shuquan Luo, Yibin Cheng, Yingchun Liu, Jingyi Liu, Yinlong Jin
BACKGROUND: Numerous studies have reported the association between ambient temperature and mortality. However, few studies have focused on the effects of extreme temperatures on diabetes mortality, particularly in China. The objective of the present study was to assess the effects of extremely cold and hot temperatures on diabetes mortality in urban areas of Harbin and Chongqing in China to provide scientific evidence for public health policy implementation to respond to challenges in diabetes mortality because of extreme temperature events...
October 2014: Environmental Research
https://www.readbyqxmd.com/read/24981822/the-effect-of-pre-existing-medical-conditions-on-heat-stroke-during-hot-weather-in-south-korea
#11
Si-Heon Kim, Soo-Nam Jo, Hyung-Nam Myung, Jae-Yeon Jang
BACKGROUND: Heat stroke contributes considerably to morbidity and mortality in hot weather, but it is unclear whether pre-existing medical conditions increase the risk of heat stroke. The purpose of this study was to assess the association between heat stroke and pre-existing medical conditions in South Korea. METHODS: A case-control study was conducted using data from a nationwide surveillance system for heat illnesses in 2012. Individuals with heat stroke were identified and compared to control subjects with mild heat illness such as heat exhaustion, heat edema, heat cramps, and heat syncope...
August 2014: Environmental Research
https://www.readbyqxmd.com/read/24809956/effects-of-temperature-and-relative-humidity-on-dna-methylation
#12
Marie-Abele Bind, Antonella Zanobetti, Antonio Gasparrini, Annette Peters, Brent Coull, Andrea Baccarelli, Letizia Tarantini, Petros Koutrakis, Pantel Vokonas, Joel Schwartz
BACKGROUND: Previous studies have found relationships between DNA methylation and various environmental contaminant exposures. Associations with weather have not been examined. Because temperature and humidity are related to mortality even on non-extreme days, we hypothesized that temperature and relative humidity may affect methylation. METHODS: We repeatedly measured methylation on long interspersed nuclear elements (LINE-1), Alu, and 9 candidate genes in blood samples from 777 elderly men participating in the Normative Aging Study (1999-2009)...
July 2014: Epidemiology
https://www.readbyqxmd.com/read/24760371/the-influence-of-weather-on-health-related-help-seeking-behavior-of-senior-citizens-in-hong-kong
#13
Ho Ting Wong, Marcus Yu Lung Chiu, Cynthia Sau Ting Wu, Tsz Cheung Lee
It is believed that extreme hot and cold weather has a negative impact on general health conditions. Much research focuses on mortality, but there is relatively little community health research. This study is aimed at identifying high-risk groups who are sensitive to extreme weather conditions, in particular, very hot and cold days, through an analysis of the health-related help-seeking patterns of over 60,000 Personal Emergency Link (PE-link) users in Hong Kong relative to weather conditions. In the study, 1,659,716 PE-link calls to the help center were analyzed...
March 2015: International Journal of Biometeorology
https://www.readbyqxmd.com/read/24713289/-the-short-term-effect-of-temperature-on-non-accidental-mortality-in-guangzhou-changsha-and-kunming
#14
Huiyan Xie, Wenjun Ma, Yonghui Zhang, Tao Liu, Hualiang Lin, Jianpeng Xiao, Yuan Luo, Yanjun Xu, Xiaojun Xu
OBJECTIVE: To explore the relationship between temperature and non-accidental mortality in Guangzhou, Changsha and Kunming;to evaluate the temperature-related risk of mortality; and thereby to provide scientific evidence for enacting the policy to tackle climate changes. METHOD: Daily meteorology data and mortality data were collected in 2006-2009 in Guangzhou, Changsha and Kunming. Distributed lag non-linear model (DLNM) was established and applied in a case-crossover design, which controlled the secular trend of time, to estimate the specified effects of temperature on non-accidental mortality at conditions of lag 0-2, lag 0-18 and lag 0-27 days, respectively...
January 2014: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/24606992/characterizing-urban-vulnerability-to-heat-stress-using-a-spatially-varying-coefficient-model
#15
Matthew J Heaton, Stephan R Sain, Tamara A Greasby, Christopher K Uejio, Mary H Hayden, Andrew J Monaghan, Jennifer Boehnert, Kevin Sampson, Deborah Banerjee, Vishnu Nepal, Olga V Wilhelmi
Identifying and characterizing urban vulnerability to heat is a key step in designing intervention strategies to combat negative consequences of extreme heat on human health. This study combines excess non-accidental mortality counts, numerical weather simulations, US Census and parcel data into an assessment of vulnerability to heat in Houston, Texas. Specifically, a hierarchical model with spatially varying coefficients is used to account for differences in vulnerability among census block groups. Socio-economic and demographic variables from census and parcel data are selected via a forward selection algorithm where at each step the remaining variables are orthogonalized with respect to the chosen variables to account for collinearity...
April 2014: Spatial and Spatio-temporal Epidemiology
https://www.readbyqxmd.com/read/24317342/sociogeographic-variation-in-the-effects-of-heat-and-cold-on-daily-mortality-in-japan
#16
Chris Fook Sheng Ng, Kayo Ueda, Ayano Takeuchi, Hiroshi Nitta, Shoko Konishi, Rinako Bagrowicz, Chiho Watanabe, Akinori Takami
BACKGROUND: Ambient temperature affects mortality in susceptible populations, but regional differences in this association remain unclear in Japan. We conducted a time-series study to examine the variation in the effects of ambient temperature on daily mortality across Japan. METHODS: A total of 731 558 all-age non-accidental deaths in 6 cities during 2002-2007 were analyzed. The association between daily mortality and ambient temperature was examined using distributed lag nonlinear models with Poisson distribution...
2014: Journal of Epidemiology
https://www.readbyqxmd.com/read/24258881/effect-modification-of-the-association-between-meteorological-variables-and-mortality-by-urban-climatic-conditions-in-the-tropical-city-of-kaohsiung-taiwan
#17
William B Goggins, Chao Ren, Edward Ng, Chunyuh Yang, Emily Y Y Chan
A deeper understanding of extreme hot weather are needed in cities sensitive to heat effects, an investigation was done in the tropical town of Kaohsiung in Taiwan. Its 11 districts were divided into three climatic classes varying from high urban heat, low levels of green space and lack of proximity to water bodies to low urban heat, adequate green space and proximity to water bodies. Daily data on natural mortality, meteorological variables, and pollutants from May-October 1999-2008 were analysed using generalised additive models for the time-series data...
November 2013: Geospatial Health
https://www.readbyqxmd.com/read/24132984/microhabitats-reduce-animal-s-exposure-to-climate-extremes
#18
Brett R Scheffers, David P Edwards, Arvin Diesmos, Stephen E Williams, Theodore A Evans
Extreme weather events, such as unusually hot or dry conditions, can cause death by exceeding physiological limits, and so cause loss of population. Survival will depend on whether or not susceptible organisms can find refuges that buffer extreme conditions. Microhabitats offer different microclimates to those found within the wider ecosystem, but do these microhabitats effectively buffer extreme climate events relative to the physiological requirements of the animals that frequent them? We collected temperature data from four common microhabitats (soil, tree holes, epiphytes, and vegetation) located from the ground to canopy in primary rainforests in the Philippines...
February 2014: Global Change Biology
https://www.readbyqxmd.com/read/24098818/the-characteristic-of-heat-wave-effects-on-coronary-heart-disease-mortality-in-beijing-china-a-time-series-study
#19
Zhaoxing Tian, Shanshan Li, Jinliang Zhang, Yuming Guo
BACKGROUND: There is limited evidence for the impacts of heat waves on coronary heart disease (CHD) mortality in Beijing, capital city of China. OBJECTIVES: We aimed to find a best heat wave definition for CHD mortality; and explore the characteristic of heat wave effects on CHD in Beijing, China. METHODS: We obtained daily data on weather and CHD mortality in Beijing for years 2000-2011. A quasi-Poisson regression model was used to assess the short-term impact of heat waves on CHD mortality in hot season (May-September), while controlling for relative humidity, day of the week, long-term trend and season...
2013: PloS One
https://www.readbyqxmd.com/read/24051892/acute-fatal-effects-of-short-lasting-extreme-temperatures-in-stockholm-sweden-evidence-across-a-century-of-change
#20
Daniel Oudin Åström, Bertil Forsberg, Sören Edvinsson, Joacim Rocklöv
BACKGROUND: Climate change is projected to increase the frequency of extreme weather events. Short-term effects of extreme hot and cold weather and their effects on mortality have been thoroughly documented, as have epidemiologic and demographic changes throughout the 20th century. We investigated whether sensitivity to episodes of extreme heat and cold has changed in Stockholm, Sweden, from the beginning of the 20th century until the present. METHODS: We collected daily mortality and temperature data for the period 1901-2009 for present-day Stockholm County, Sweden...
November 2013: Epidemiology
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