Japan is projected to be a super-aged society where one in four people will be aged 75 years or older by 2065. For
older adults, low health literacy (HL) hinders health maintenance and the prevention of long-term health needs,
ultimately leading to a decline in quality of life (QOL). Therefore, HL is an important indicator. This study used a
self-administered questionnaire to investigate factors influencing HL among community-dwelling older adults in
two cities of Nagasaki Prefecture, a regional area experiencing severe depopulation. No associations were found
between the total HL score and basic attributes or depressive tendencies. However, significant associations
were observed between HL subscale scores and both age and household income, and participants with higher
dietary awareness had significantly higher scores (
p<0.05). The total HL score in Nagasaki City, where 28% of the population was aged 75 years or older, was significantly higher (
p<0.01) than in Omura City, where 82% of the population was aged 75 years or older. However, no significant difference was observed in the critical HL score.
We concluded that when promoting social activities or providing useful information on dietary habits, it is important
to consider local characteristics and age groups, use communication methods suited to the target population, and
offer support that makes it easy to incorporate the information into daily life.
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