Serum micronutrient concentrations and decline in physical function among older persons.

Area of Science:

• Gerontology
• Nutritional Science
• Public Health

Background:

• Maintaining independence in older adults is a public health priority.
• Factors contributing to physical function decline require identification for preventative strategies.
• The impact of poor nutrition on physical function decline in the elderly remains unclear.

Purpose of the Study:

• To investigate the association between low serum micronutrient concentrations and subsequent physical function decline in community-dwelling older adults.
• To determine if specific micronutrient deficiencies predict future loss of physical function.

Main Methods:

• A longitudinal study involving 698 community-living individuals aged 65 and older in Tuscany, Italy.
• Physical function decline was defined as a ≥1-point loss on the Short Physical Performance Battery over 3 years.
• Logistic regression, general linear models, and classification and regression tree analyses were employed to assess associations.

Main Results:

• A low serum concentration of vitamin E (<1.1 microg/mL) was significantly associated with subsequent physical function decline (OR, 1.62).
• Baseline vitamin E concentration, analyzed continuously, was significantly associated with follow-up physical function after adjustments.
• Age over 81 and low vitamin E were the strongest predictors of physical decline in specific age groups.

Conclusions:

• Empirical evidence suggests a link between low serum vitamin E and declining physical function in older adults.
• Clinical trials are recommended to explore whether optimizing vitamin E levels can mitigate functional decline and disability in the elderly.