Association of Intrinsic Capacity Impairment with Physical Function in Older Adult Participants of a Public Health Center-based Visiting Healthcare Program
Purpose: This study aimed to examine the distribution and combination patterns of intrinsic capacity impairment and analyze its association with physical function among vulnerable older adults who participated in a visiting healthcare program at a public health center. Methods: This cross-sectional secondary analysis used data from older adult participants of a visiting healthcare program that was conducted at four public health centers. Intrinsic capacity impairment was assessed across six domains: cognition, mobility, depressive symptoms, sensory function, nutritional status, and oral function. Physical function was measured using the grip strength, balance, timed up and go (TUG) test, and instrumental activities of daily living (IADL). The data were analyzed to identify the prevalence and combinations of intrinsic capacity impairment and examine its association with physical function. Results: In total, 87.6% of the participants showed impairment in at least one domain of intrinsic capacity. Impairment of oral function was the most prevalent (42.6%), followed by depressive symptoms (34.9%); cognitive (33.1%), mobility (24.3%), and sensory (18.3%) impairments; and malnutrition (8.3%). Impairment of oral function frequently co-occurs with cognitive, psychological, and mobility impairments. Intrinsic capacity impairment was significantly associated with the grip strength, balance, TUG test, and IADL, and higher levels of intrinsic capacity impairment were associated with lower physical function. Conclusion: Intrinsic capacity impairment is closely associated with physical function in community-dwelling older adults. Comprehensive assessment and integrated management of intrinsic capacity, including oral health, are necessary to prevent functional decline and support aging in place.