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A Free-breathing fMRI Method to Study Human Olfactory Function
Published on: July 30, 2017
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Association between perceived olfactory dysfunction and all-cause mortality in Chinese adults: A prospective
Zhicheng Zhang1, Yesong Liu2, Yaqi Li3
1School of Public Health, Institute of Nutrition, Zhongshan Hospital, Fudan University, Shanghai, China.
Journal of Global Health
|November 15, 2024
Summary
Perceived olfactory dysfunction, or a reduced sense of smell, is linked to a higher risk of death from any cause in Chinese adults. This finding highlights the importance of smell in overall health and longevity.
Area of Science:
- Gerontology
- Epidemiology
- Public Health
Background:
- Olfactory dysfunction is increasingly recognized as a potential indicator of health status.
- Previous research suggests a link between impaired sense of smell and increased all-cause mortality.
- However, large-scale studies are needed to confirm this association.
Purpose of the Study:
- To investigate the association between perceived olfactory dysfunction and all-cause mortality in a large Chinese cohort.
- To quantify the risk of mortality associated with olfactory dysfunction, adjusting for potential confounders.
Main Methods:
- Utilized data from 97,327 Chinese adults in the Kailuan cohort.
- Assessed perceived olfactory dysfunction at baseline via a subjective question.
- Collected mortality data from government records over a median follow-up of 6.4 years.
- Employed Cox proportional hazards regression models to analyze mortality risk.
Main Results:
- A total of 3903 deaths were recorded during the follow-up period.
- Individuals reporting olfactory dysfunction had a significantly higher risk of all-cause mortality (adjusted Hazard Ratio = 1.42; 95% Confidence Interval = 1.02-2.00).
- Sensitivity analyses, excluding various subgroups, consistently supported the main finding.
Conclusions:
- Perceived olfactory dysfunction is associated with an elevated risk of all-cause mortality in Chinese adults.
- Limitations include the lack of a national-representative sample and subjective exposure assessment.
- Further research using objective measures is recommended to validate these findings and explore underlying mechanisms.
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