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Related Experiment Videos

Smell identification ability: changes with age.

R L Doty, P Shaman, S L Applebaum

    Science (New York, N.Y.)
    |December 21, 1984
    PubMed
    Summary

    Smell identification declines with age, with women and nonsmokers performing better. Olfactory impairment is common in older adults, affecting their quality of life and safety.

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    Area of Science:

    • Gerontology
    • Neuroscience
    • Sensory Science

    Background:

    • Olfactory function is crucial for quality of life, influencing taste perception and environmental awareness.
    • Age-related sensory changes, particularly in olfaction, are increasingly recognized as significant health concerns.
    • Understanding smell identification decline is vital for public health and safety initiatives.

    Purpose of the Study:

    • To assess smell identification abilities across a wide age range (5-99 years).
    • To identify demographic and lifestyle factors influencing olfactory performance.
    • To quantify the prevalence of olfactory impairment in older adult populations.

    Main Methods:

    • A large-scale study involving 1955 participants aged 5 to 99 years.
    • Standardized smell identification tests were administered to all participants.
    • Data were analyzed to compare performance based on age, sex, and smoking status.

    Main Results:

    • Women consistently outperformed men in smell identification across all age groups.
    • Nonsmokers demonstrated superior olfactory abilities compared to smokers.
    • Peak smell identification occurred between the 30s and 50s, with a significant decline after age 70.
    • Major olfactory impairment affected over 50% of individuals aged 65-80 and over 75% of those over 80.

    Conclusions:

    • Age is a primary factor in smell identification decline, with significant impairment common in the elderly.
    • Reduced smell identification in older adults can lead to decreased enjoyment of food and increased risk of safety hazards like gas poisoning.
    • These findings highlight the need for interventions and awareness regarding age-related olfactory dysfunction.

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