%0 Journal Article %@ 1438-8871 %I JMIR Publications %V 26 %N %P e57205 %T Messenger App–Based Information Provision for Promoting Social Participation to Enhance Well-Being Among Community-Dwelling Adults: Randomized Controlled Trial %A Nakagomi,Atsushi %A Abe,Noriyuki %A Chen,Yu-Ru %A Ide,Kazushige %A Kobayashi,Shuhei %A Hanazato,Masamichi %A Kondo,Katsunori %+ Center for Preventive Medical Sciences, Chiba University, 1-33 Yayoicho, Inage Ward, Chiba, 263-8522, Japan, 81 43 251 1111, anakagomi0211@gmail.com %K messenger app %K event information %K happiness %K social participation %K messenger %K app %K well-being %K adults %K aging %K randomized controlled trial %K RCT %K information technology %K social activity %K Japan %K urban community %K health information %K control group %K multivariable regression %K life satisfaction %K digital intervention %K community-dwelling %D 2024 %7 29.11.2024 %9 Original Paper %J J Med Internet Res %G English %X Background: Engaging in social activities, interacting with peers, and participating in community events may promote health and well-being. Recently, interventions leveraging information and communications technology have emerged as potent tools for promoting social connections and well-being. Particularly, messenger apps have become an integral part of our daily lives, facilitating communication, information dissemination, and social interaction. However, there remains a gap in the literature regarding the utilization of widely adopted messenger apps for this purpose. Objective: This study aimed to evaluate the impact of messenger app–based information provision aimed at promoting social participation on the enhancement of subjective well-being among Japanese community-dwelling adults. Methods: A 2-arm, parallel-group randomized controlled trial was conducted from October 2022 to January 2023 in the Kashiwa-no-ha campus area, Japan—an urban community with active local events. A total of 358 community-dwelling adults who use messenger apps daily were recruited for the study. Of these, 235 (65.6%) participants completed the follow-up survey. Participants were randomly assigned to either the intervention group, receiving the health benefits of social participation and information about local events or spots via a messenger app, or the control group, receiving general health information. The primary outcome was subjective happiness after the intervention, measured on an 11-point scale ranging from 0 (Unhappy) to 10 (Happy). Secondary outcomes included life satisfaction, meaning of life, purpose in life, and participation in local events. The outcomes were analyzed with t tests (2-tailed) and multivariable regression based on the intention-to-treat method. Results: After the intervention, the intervention group reported a mean happiness score of 7.7 (SD 1.7), while the control group reported a score of 7.5 (SD 2.0), with no statistically significant difference (P=.40). Multivariable linear regression analysis adjusted for baseline outcome values and covariates showed that the coefficient of the intervention for life satisfaction was 0.30 (95% CI –0.07 to 0.68; P=.12), while that for meaning of life was 0.33 (95% CI –0.03 to 0.70; P=.07). There was no significant difference in event participation rates between the 2 groups during the study period (P=.22). However, 82.2% (102/124) of the intervention group acknowledged the utility of the event information provided. Conclusions: Messenger app–based information provision did not yield a significant increase in subjective happiness, while there was a positive but not significant trend in life satisfaction. The findings underscore the need for more intensive intervention in future studies to harness the potential of digital interventions. Trial Registration: UMIN Clinical Trials Registry UMIN000049047; https://tinyurl.com/2zzrrae8 %M 39612209 %R 10.2196/57205 %U https://www.jmir.org/2024/1/e57205 %U https://doi.org/10.2196/57205 %U http://www.ncbi.nlm.nih.gov/pubmed/39612209