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However, more evidence is needed from multi-domain interventions using broad-scale objective and self-report assessments and intra-individual change data-analytical techniques.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Method<\/jats:title>\n                    <jats:p>SMART-AGE examines the effect of an app-based multilevel treatment designed to enhance social participation, physical fitness, and health awareness. The target population comprises healthy and community-dwelling adults 67\u00a0years and older with basic digital skills in two socially diverse communities. Treatment relies on an Android-based tablet computer, on which three apps offering interventions in the core areas of social participation, physical fitness, and health awareness are pre-installed. A feedback app designed to provide participants with a feedback option at any time is also offered. Participants are randomly assigned to three intervention arms and assessed at baseline and after 3 and 6\u00a0months. Arm 1 receives the full intervention, consisting of the social participation app, the physical fitness app, the health awareness app, and the feedback app. The health awareness app is available in months 4 to 6, meaning that participants receive the full three-app intervention only in the second half of the intervention period. Arm 2 receives the social participation app and the feedback app throughout the intervention. Arm 3 serves as an active control condition in that a stand-alone tablet with a low-dose introduction to publicly available standard apps is provided. The data protocol includes assessment of three primary outcome domains: social support and loneliness, motor capacity and physical performance, and health awareness and health locus of control. Potential moderators (e.g., cognitive function, depression) as well as various technology-oriented constructs (e.g., skills, acceptance) are also assessed. App use data are automatically collected across the full intervention interval in arms 1 and 2. Data management is conducted within a cloud-based REDCap architecture. Feedback recordings via the feedback app are collected in arms 1 and 2 and undergo qualitative analysis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>The SMART-AGE intervention aims to enhance core domains of health-related quality of life in community-dwelling older adults through an app-based multi-domain intervention and a user-centered approach.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Trial registration<\/jats:title>\n                    <jats:p>\n                      German-Clinical-Trials-Register, DRKS00034316. Registered 29-May-2024,\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"https:\/\/drks.de\/search\/en\/trial\/DRKS00034316\" ext-link-type=\"uri\">https:\/\/drks.de\/search\/en\/trial\/DRKS00034316<\/jats:ext-link>\n                      . The study\u2019s design and hypotheses were also pre-registered in the Open Science Framework (OSF) prior to study enrollment (\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"10.17605\/OSF.IO\/YQEBW\" ext-link-type=\"doi\">https:\/\/doi.org\/10.17605\/OSF.IO\/YQEBW<\/jats:ext-link>\n                      , 2023\u201304-28).\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s13063-026-09641-3","type":"journal-article","created":{"date-parts":[[2026,3,21]],"date-time":"2026-03-21T12:43:53Z","timestamp":1774097033000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Testing a digitally administered intervention to increase social participation, physical fitness, and health awareness among healthy older adults by means of tablet-based app use: study protocol of the SMART-AGE randomized controlled 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