In recent years, heat waves have multiplied and night temperatures are on the rise. However, a new Canadian study shows that these hot summer nights have repercussions on cardiovascular health. And more precisely on the heart of men in their early sixties.
For this study, published in the British medical journalthe researchers analyzed data on heart attack deaths of nearly 40,000 men and women aged 60-64 and 65-69, which occurred in England and Wales in June and July between 2001 and 2015. They also looked at similar data on 500 men in Washington state (USA) and studied weather data from these regions.
After controlling for covariates, the results show that a 1°C increase in nighttime temperature is significantly associated with a 3.1% increased risk of death from heart attack in men aged 60 to 64 in England and Wales, and with a 4.8% increased risk in the United States.
As it is an observational study, it cannot establish causality, but its data on deaths and weather conditions, should encourage the implementation of a risk prevention policy among men in their early 60s, explained the authors.
Source : Warmer summer nocturnal surface air temperatures and cardiovascular disease death risk: a population-based studyBritish medical journal, March 2022
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