Predictors of Problematic Internet Use Among Gifted Children: The Role of Health Literacy and Health-Promoting Lifestyle Beliefs

Background/Objectives: Problematic internet use (PIU) is a growing behavioral health concern among school-aged children. Whether health literacy and health-promoting lifestyle beliefs are associated with PIU among gifted children—a developmentally distinct population—has, to the best of our knowledge, not been investigated. Methods: A cross-sectional correlational design was used with 118 gifted students (M = 13.80, SD = 2.06) attending a Science and Art Center (BİLSEM) in İzmir, Türkiye. Data were collected using the Problematic Internet Use Scale–Adolescent Form (PIUS-A; α = 0.92), the Health Literacy for School-Aged Children Scale (HLSAC; α = 0.87), and the Adolescent Health-Promoting Lifestyle Beliefs Scale (AHPLBS; α = 0.91) in a classroom setting under researcher supervision. A three-step hierarchical multiple linear regression was performed, with age, sex, daily sleep duration, daily screen time, and weekly physical activity entered as covariates in the first step. Results: Covariates explained 24.8% of the variance in PIU (p < 0.001), with daily screen time as the strongest predictor (β = 0.36). Health-promoting lifestyle beliefs added significant incremental variance (ΔR2 = 0.063, p = 0.023); health beliefs were the only statistically significant belief predictor (β = −0.24, p = 0.036), with lower health belief scores associated with higher PIU. Health literacy domains did not add statistically significant incremental variance (ΔR2 = 0.028, p = 0.495), and no individual domain was a statistically significant predictor. Conclusions: Within the constraints of a cross-sectional design, health beliefs appear to play a more prominent role than health literacy in the covariate-adjusted explanation of PIU among gifted school-aged children. School health nurses may prioritize interventions that strengthen internalized health beliefs alongside information-based education, contributing to more equitable, tailored school health services for this population.