The effect of ambient temperature on cardiovascular mortality in 27 Brazilian cities

Silveira, Ismael Henrique; Oliveira, Beatriz Fátima Alves de; Cortes, Taísa Rodrigues; Junger, Washington Leite

doi:10.1016/j.scitotenv.2019.06.493

Cited by 57 publications

(72 citation statements)

References 51 publications

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“…Here, we observed that large dengue outbreaks in years 2009, 2015, and 2016 occurred several weeks after heatwaves ( Fig 1B). The delayed effects of temperature on non-infectious diseases have been well documented in the literature [36,37]; similarly, it may take some time to observe the effects of heatwaves on dengue outbreaks. A series of several processes link anomalous temperature extremes with outbreaks: following the initially negative effects of heatwaves decreasing local mosquito populations [15], weather conditions occur that are favourable for mosquito growth and reproduction [38], ultimately resulting in an accumulation of dengue infection and outbreaks.…”

Section: Discussionmentioning

confidence: 90%

Heatwaves and dengue outbreaks in Hanoi, Vietnam: New evidence on early warning

et al. 2020

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Background Many studies have shown associations between rising temperatures, El Niño events and dengue incidence, but the effect of sustained periods of extreme high temperatures (i.e., heatwaves) on dengue outbreaks has not yet been investigated. This study aimed to compare the short-term temperature-dengue associations during different dengue outbreak periods, estimate the dengue cases attributable to temperature, and ascertain if there was an association between heatwaves and dengue outbreaks in Hanoi, Vietnam.

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Section: Discussionmentioning

confidence: 90%

Heatwaves and dengue outbreaks in Hanoi, Vietnam: New evidence on early warning

et al. 2020

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“…The effects of low and high temperatures on CVD mortality have been identified in numerous epidemiological studies around the world 1 3 4 21 and in Brazil. 7 Although the mechanisms underlying the temperature–CVD mortality relationship are not fully understood, several potential physiological pathways have been proposed. 22 23 Low temperatures can lead to vasoconstriction and the release of inflammatory markers in the bloodstream.…”

Section: Discussionmentioning

confidence: 99%

“…1–5 The literature also shows that the nature of this relationship and the magnitude of the associations differ across regions. 6–9 In addition to methodological differences across studies, other potential reasons for these variations may include local differences in adaptive capacity and mechanisms related to biophysical and social vulnerability. 10…”

Section: Introductionmentioning

confidence: 99%

Temperature and cardiovascular mortality in Rio de Janeiro, Brazil: effect modification by individual-level and neighbourhood-level factors

Silveira

Cortes

Oliveira

et al. 2020

J Epidemiol Community Health

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BackgroundMany factors related to susceptibility or vulnerability to temperature effects on mortality have been proposed in the literature. However, there is limited evidence of effect modification by some individual-level factors such as occupation, colour/race, education level and community-level factors. We investigated the effect modification of the temperature–cardiovascular mortality relationship by individual-level and neighbourhood-level factors in the city of Rio de Janeiro, Brazil.MethodsWe used a case-crossover study to estimate the total effect of temperature on cardiovascular mortality in Rio de Janeiro between 2001 and 2018, and the effect modification by individual-level and neighbourhood-level factors. Individual-level factors included sex, age, colour/race, education, and place of death. Neighbourhood-level characteristics included social development index (SDI), income, electricity consumption and demographic change. We used conditional Poisson regression models combined with distributed lag non-linear models, adjusted for humidity and public holidays.ResultsOur results suggest a higher vulnerability to high temperatures among the elderly, women, non-hospitalised deaths, and people with a lower education level. Vulnerability to low temperatures was higher among the elderly, men, non-white people, and for primary education level. As for neighbourhood-level factors, we identified greater vulnerability to low and high temperatures in places with lower SDI, lower income, lower consumption of electricity, and higher demographic growth.ConclusionThe effects of temperature on cardiovascular disease mortality in Rio de Janeiro vary according to individual-level and neighbourhood-level factors. These findings are valuable to inform policymakers about the most vulnerable groups and places, in order to develop more effective and equitable public policies.

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“…The excess mortality in summer is attributed to an increased prevalence of CVDs ( 4 – 5 ). The exposure-response curve of temperature-CVDs mortality is usually depicted as U-, V-, or J-shaped, indicating that mortality increases gradually when the temperature exceeds the threshold ( 6 ). Threshold temperature, a critical standard for identifying the extent of urban heat island (UHI)-mediated damage on health ( 7 – 8 ), can help explore the spatio-temporal pattern characteristics of UHI’s effect on CVDs.…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Mechanism Underlying the Effect of Urban Heat Island on Cardiovascular Diseases

Huang¹,

Deng²,

Yang³

et al. 2020

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Background: We explored the spatio-temporal characteristics of urban heat island (UHI) effect on cardiovascular diseases (CVDs). Methods: The land surface temperatures (LST) were retrieved from four Landsat remote-sensing images’ data, the temperature data from 95 meteorological stations, and analysis data on CVDs mortality. Based on these data, landscape pattern indexes were used to analyze the pattern-process-function and the mechanism. Results: During 1984–2017, the effects of UHI on CVDs increased, thereby increased the mortality by 28.8%. The affected areas gradually expand from the central area of the city and undergo three evolution stages; the highly affected areas are mainly distributed in central and southern regions, and patches increase in number. The areas and ratio of high-level patches also show an upward tendency, increasing dominance in the overall landscape. Patches of the overall landscape become more complicated in shape, whereas those of high-level ones become less complicated. Concentration degree of the overall landscape decreases gradually with the types of landscapes patches increasing, reaching a rather even space distribution. Conclusion: Increased temperatures exacerbated by UHI lead to increased CVD mortality. As cities expand, the effects of UHI on CVDs increase in terms of both intensity and areas, with the overall landscape in uneven distribution, high-level affected areas in point distribution, and low-level ones in large-area concentration.

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The effect of ambient temperature on cardiovascular mortality in 27 Brazilian cities

Cited by 57 publications

References 51 publications

Heatwaves and dengue outbreaks in Hanoi, Vietnam: New evidence on early warning

Heatwaves and dengue outbreaks in Hanoi, Vietnam: New evidence on early warning

Temperature and cardiovascular mortality in Rio de Janeiro, Brazil: effect modification by individual-level and neighbourhood-level factors

Spatio-Temporal Mechanism Underlying the Effect of Urban Heat Island on Cardiovascular Diseases

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