关键词: 老年人, 失能, 风险评估, 分层干预, 数字化平台

Abstract:

Objective To develop and assess the usability of a digital management platform for risk assessment and stratified intervention of disability in older adults，and conduct usability evaluation，so as to providing a tool for early precise identification and continuous management of disability. Methods The stratified intervention program for disability in older adults was developed based on literature analysis and expert consultation. Guided by the Iron Triangle framework，the functions of a management platform for disability risk assessment and stratified intervention in older adults were designed. From November to December 2025，30 older adults from 2 community health service centers in Hangzhou were recruited to pilot the platform. Platform usability was evaluated using the System Usability Scale（SUS） and the completion rate of intervention task check-ins. Results The effective response rates of the 2 rounds of expert consultation were both 100%. The expert authority coefficient was 0.93，and the Kendall’s coefficients of concordance were 0.351 and 0.426，respectively（both P<0.05）. The disability risk stratified intervention strategy was constrained by risk levels along with auxiliary rules. Intervention content，dosage，recommended frequency，and implementation requirements were established across 4 dimensions，including physical activity，dietary nutrition，rest and sleep，cognitive psychology and social support. A total of 28 valid questionnaires were included in the usability evaluation. The score of SUS was（81.43±12.41） points，and the completion rate of intervention task check-ins was 78.9%. Conclusion The management platform for disability risk assessment and stratified intervention in older adults demonstrated good usability and provides a practical tool for continuous management in the prevention and control of disability among older adults.

Key words: Aged, Disability, Risk Assessment, Stratified Intervention, Digital Platform