Stress hormone heart death link 壓力荷爾蒙與心臟病死亡相關

High levels of the stress hormone cortisol are closely linked to death from cardiovascular disease, a Dutch study suggests.
In a six-year study of 860 over-65s, those with the highest levels of cortisol had a five-fold risk of death from cardiovascular disease. No link was found between high cortisol levels and other causes of death.
Cortisol is produced in order to help the body recover from stress and regain its physiological stability. But very high levels have been linked to risk factors for cardiovascualr disease.
In this study, researchers measured urinary cortisol levels in each participant. During the six years covered by the study, 183 people died. Cause of death was ascertained from death certificates.
The third of the subjects with the highest urinary cortisol had a five-fold increased risk of dying of cardiovascular disease.
urinary:形容詞,尿的,泌尿系統的。如:urinary tract infections 泌尿道感染。
-fold: 字尾,……倍。例句:In the last 50 years, there has been a 33-fold increase in the amount of pesticide used in farming.(過去50年間,農耕使用殺蟲劑的量增加了33倍。)
ascertain:動詞,確定。例句:The police have so far been unable to ascertain the cause of the explosion.(警方目前還不能確定爆炸原因。)

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