Be careful! The olfactory decline is dangerous and may indicate that death is coming

Be careful! The olfactory decline is dangerous and may indicate that death is coming

May 09, 2019 Source: Sina Technology

Sina Technology News Beijing time on May 8th news, according to foreign media reports, what is the relationship between human life and smell? It is well known that the neurological damage caused by Parkinson's syndrome and dementia affects people's olfactory ability, so scientists began to study whether it can explain the subtle connection between nose olfaction and death.

Compared with older people with olfactory sensitivities, older adults who have tested for olfactory decline have higher mortality after 10 years. Scientists believe that the decline in olfactory function in the elderly may indicate that “the limit is approaching”.

In a recent study, older adults with a poor sense of smell had a 46% higher mortality rate after 10 years compared with older adults who passed the olfactory test.

At the same time, 28% of the factors that cause poor mortality in the elderly can be attributed to Parkinson's syndrome, dementia and obesity, which can lead to death, and may also affect someone's olfactory function, the remaining 72% factor It is difficult to explain, probably due to the deterioration of subtle health conditions.

According to the study, about a quarter of older people experience olfactory decline, but this situation is easily overlooked compared to blindness or deafness. Some studies have linked olfactory decline to risk of death within 5 years, but did not take into account demographic information such as gender and ethnicity, nor did they incorporate health features that may explain the link between olfactory loss and death.

In 1997-1998, scientists conducted a follow-up test on approximately 3,000 elderly people aged 70-79. At the beginning of the study, nearly 2,300 people completed the olfactory test, in which they were asked to identify 12 common odors. Each year they receive this olfactory test until death, or whether the researchers' deaths or olfactory degeneration as of 2014, analyze the first two cases.

In a total of 13 years of follow-up testing, approximately 1,200 testers died, compared with those with higher scores in the olfactory test, those with lower scores, followed by a 46% increase in mortality over the next 10 years, followed by a 13-year increase in mortality. 30% higher.

According to the researchers, the correlation of tracking data for the past 10 years after the olfactory test is relatively true and accurate. Statistics are performed 13 years after the test. The age of the tester is close to the end of life. The data is not accurate. After all, the tester mortality rate increases with age. It is mainly related to the increase of age, and has little to do with the ability of smell or the health status at the beginning of the study.

For a healthy person, smell seems to be a particularly effective "death warning device." The testers said that they were in good health. Compared with those who had a good sense of smell, those with poor sense of smell had a 62% higher mortality rate in the next 10 years and a 40% higher mortality rate in the next 13 years.

Even if some factors are taken into account, the olfactory difference can explain 70% of the difference in death time. The research organization also conducts statistical analysis of race and gender, which may also be an effective tool for quantifying health. Researchers say that abnormalities in the sense of smell in the elderly may potentially signal early warnings of adverse health conditions that ultimately lead to death. (叶倾城)

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