International Journal of Innovative Research in Health Science

Background: Smartphone addiction among students is an emerging public health concern, impacting their mental, physical, and social well-being. Awareness about the ill effects of smartphone overuse remains inadequate among adolescents. Aim: To evaluate the effectiveness of a video-assisted teaching program on knowledge regarding the ill effects of smartphone addiction among students in Elango Corporation Higher Secondary School, Madurai. Methods: A quantitative quasi-experimental one-group pretest-posttest design was adopted. A total of 200 students aged 14–17 years were selected using probability simple random sampling. Data were collected through a structured knowledge questionnaire before and after the intervention. Descriptive and inferential statistics, including paired t-test and chi-square test, were used for analysis. Results: In the pretest, 59% of students had poor or very poor knowledge, with a mean score of 48.73±19.4. After the video-assisted teaching, 93% of students attained excellent knowledge, with a mean posttest score of 87.30±9.10. The improvement was statistically significant (t=31.15, p≤0.001). Mother’s education and occupation showed a significant association with posttest knowledge. Conclusion: Video-assisted teaching was effective in significantly improving students’ knowledge about the ill effects of smartphone addiction. Early educational interventions can help foster healthier smartphone use habits among adolescents.