Literasi Kesehatan Digital dan Dukungan Sosial sebagai ModeratorKeterikatan Aplikasi mHealth terhadap Perilaku PeningkatanKesehatan Remaja

Background: Digital health interventions frequently yield inconsistent outcomes among youth due to unexamined conual fac- tors. Objective: This study aimed to examine the conditional processes through which mobile health (mHealth) app engagement influences adolescent health-promoting behaviors, specifically identifying the moderating roles and empirical thresholds of social support and digital health literacy. Methods: A cross-sectional study was conducted at Poltekkes Kemenkes Makassar from February to May 2025. A sample of 205 adolescents completed validated surveys assessing mHealth engagement, social support (MSPSS), e-health literacy (I-eHEALS), and health behaviors. Ethical approval was granted by the institutional ethics committee, and informed consent was obtained. Data were analyzed using multiple regression and Johnson-Neyman moderation techniques. Results: The mHealth engagement significantly predic- ted health-promoting behaviors (beta = .26, p <.001), with the overall model explaining 44.9% of the variance (R2 = .449). Moderation analyses confirmed significant interaction effects for social support (beta = .18, p = .004) and digital health literacy (beta = .15, p = .012). Floodlight analysis revealed that mHealth engagement became statistically significant only when social support exceeded 48.20 and digital health literacy exceeded 26.10. Conclusions: Digital health efficacy relies heavily on supportive social and cognitive environments. Public health initiatives must integrate digital literacy training and peer support to optimize mHealth outcomes.