noun which may take the genitive case particle 'no'
senile; age-related
Used as a no-adjective to describe conditions, diseases, or changes associated with old age, especially in medical or caregiving contexts.
祖母は老人性の白内障で手術を受けた。
My grandmother had surgery for a senile cataract.
老人性の物
Age-related forgetfulness is different from dementia.