Effects of temperature on mortality in Hong Kong: a time series analysis

Yi, Wen; Chan, Albert P.C.

doi:10.1007/s00484-014-0895-4

Cited by 70 publications

(41 citation statements)

References 58 publications

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“…22 Air pollutants (PM 10 , NO 2 , and O 3 ) were controlled by including thirddegree constrained polynomial distributed lags with a maximum lag of 3 days. 23 Autocorrelation of the residuals of the model was checked by partial autocorrelation function, which showed no serial autocorrelations along the lags. 24 The model can be specified as follows: …”

Section: Statistical Modelingmentioning

confidence: 99%

Emergency Cardiovascular Hospitalization Risk Attributable to Cold Temperatures in Hong Kong

Tian

Qiu

Sun

et al. 2016

Circ: Cardiovascular Quality and Outcomes

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Background-Associations between ambient temperature and cardiovascular morbidity have been well studied worldwide;however, few studies determined the cardiovascular disease burden attributable to temperature. We aimed to assess the risk attributed to temperature based on the exposure-lag-response relationship between temperature and circulatory diseases. Methods and Results-We collected daily time series data of emergency hospital admissions, mean temperature, and air pollution concentrations from January 2005 to December 2012 in Hong Kong. The association with temperature was modeled using a distributed lag nonlinear model integrated in quasi-Poisson regression. The cumulated effects of cold/ hot temperature were abstracted. Attributable risk measures because of below optimal temperature (OT) were calculated to summarize the disease burden, and further separated into contributions from moderate and extreme cold temperatures. We observed significant nonlinear and delayed cold effect but no apparent hot effect lasting for 3 weeks on emergency circulatory hospitalizations. Compared with the identified OT at 23.0°C, the cumulative relative risk during 0 to 21 lag days was 1.69 (95% confidence interval, 1.56-1.82) for extreme cold (first percentile) and 1.22 (95% confidence interval, 1.15-1.29) for moderate cold temperature (10th percentile). Cold temperatures were responsible for temperature-related circulatory emergency hospitalizations, with attributable fraction of 6.33% for moderate cold and 0.82% for extreme cold while inducing 33 030 and 4257 cases, respectively. Several specific causes of cardiovascular diseases showed higher vulnerability. Conclusions-Moderate cold weather was responsible for a considerable attributable risk for cardiovascular diseases. The temperature-related hospitalizations risk found in this study may provide evidence for guiding the public health policies and preventions for cardiovascular diseases. (Circ Cardiovasc Qual Outcomes. 2016;9:135-142.

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Section: Statistical Modelingmentioning

confidence: 99%

Emergency Cardiovascular Hospitalization Risk Attributable to Cold Temperatures in Hong Kong

Tian

Qiu

Sun

et al. 2016

Circ: Cardiovascular Quality and Outcomes

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“…Numerous studies have reported impacts of temperature on health, particularly mortality (Lin et al, 2011; Curriero et al, 2002; Son et al, 2011 and 2014; Monteiro et al 2013; Basu, 2009; Anderson and Bell, 2009; Xu et al, 2014; Yi and Chan 2014), although most research was conducted for North America or Europe. Far less is known regarding impacts of temperature on mortality in some other regions of the world, especially in urban populations of countries with emerging economies.…”

Section: Introductionmentioning

confidence: 99%

The impact of temperature on mortality in a subtropical city: effects of cold, heat, and heat waves in São Paulo, Brazil

et al. 2015

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Understanding how weather impacts health is critical, especially under a changing climate; however, relatively few studies have investigated subtropical regions. We examined how mortality in São Paulo, Brazil is affected by cold, heat, and heat waves over 14.5 years (1996-2010). We used over-dispersed generalized linear modeling to estimate heat- and cold-related mortality, and Bayesian hierarchical modeling to estimate overall effects and modification by heat wave characteristics (intensity, duration, and timing in season). Stratified analyses were performed by cause of death and individual characteristics (sex, age, education, marital status, and place of death). Cold effects on mortality appeared higher than heat effects in this subtropical city with moderate climatic conditions. Heat was associated with respiratory mortality and cold with cardiovascular mortality. Risk of total mortality was 6.1% (95% confidence interval 4.7, 7.6%) higher at the 99th percentile of temperature than the 90th percentile (heat effect) and 8.6% (6.2, 11.1%) higher at the 1st compared to the 10th percentile (cold effect). Risks were higher for females and those with no education for heat effect, and males for cold effect. Older persons, widows, and non-hospital deaths had higher mortality risks for heat and cold. Mortality during heat waves was higher than on non-heat wave days for total, cardiovascular, and respiratory mortality. Our findings indicate that mortality in São Paulo is associated with both cold and heat and that some subpopulations are more vulnerable.

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“…In Western European countries, a rise in temperature was followed by an increase in mortality rates or ECU (Lippmann et al 2013;Tong et al 2014). In contrast, in subtropical regions, lower temperatures were linked to an increase in ECU because lower temperatures affected the incidence circulatory and respiratory system-related diseases (Wang et al 2012b;Yi & Chan 2015). Additionally, previous studies have pointed out that moderately hot and cool temperatures increased mortality rates while the effects of extreme temperatures were lower (Gasparrini et al 2015).…”

Section: Discussionmentioning

confidence: 95%

Relationship between emergency care utilization, ambient temperature, and the pollution standard index in Taiwan

Tseng

Lan

et al. 2017

International Journal of Environmental Health Research

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This study applied a vector error correction model to investigate the effects of ambient temperature (AT) and air quality index values on emergency care utilization (ECU). The Pollution Standards Index (PSI) and total suspended particulates (TSP) were used for analysis. Data were obtained from the National Health Insurance Research Database of the Ministry of Transportation and Communications and Ministry Environmental of Protection Administration of Taiwan. Data from January of 1998 to December of 2012 (180 months) were analyzed. Study results showed that, regardless of long-term equilibrium or short-term dynamics, a 1 °C increase in AT will decrease ECU, showing that AT strongly affects ECU. There were no significant corrections of long-term equilibrium of PSI and TSP on ECU. Only short-term TSP dynamics caused negative effects in the first ECU phase. Emergency care requires special monitoring of AT and TSP to respond to the increased number of high-risk patients consulting emergency departments.

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Effects of temperature on mortality in Hong Kong: a time series analysis

Cited by 70 publications

References 58 publications

Emergency Cardiovascular Hospitalization Risk Attributable to Cold Temperatures in Hong Kong

Emergency Cardiovascular Hospitalization Risk Attributable to Cold Temperatures in Hong Kong

The impact of temperature on mortality in a subtropical city: effects of cold, heat, and heat waves in São Paulo, Brazil

Relationship between emergency care utilization, ambient temperature, and the pollution standard index in Taiwan

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