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The relationships between biochemical marker, mortality rates, lifestyle, and functional phenotypes demonstrated by this classification method indicate that the system is reliable to address the functional status of extremely old persons. Thus, this framework would be a useful tool for exploring the factors that contribute to exceptional longevity as well as those that help to maintain the functional status of the extremely old population.

The present study confirmed that there are age and sex differences in taste sensitivity for the four basic tastes among young adult, young-old, and old-old Japanese, and that the sensitivity of sweet taste is more robust than the other tastes. Geriatr Gerontol Int 2016; 16: 1281-1288.

The JST-IC is useful for assessing competence at a higher level in community-dwelling older adults.