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Journal : Health Dynamics

Enhancing Adolescent Nutrition Knowledge Through Digital Innovation: Evaluating the Effectiveness of E-Pocket Books in Reducing Obesity Hastuti, Puput Tri; Utami, Siti Budi; Rialihanto, Muhammad Primiaji; Susilo, Joko; Attawet, Jutharat; Siswati, Tri
Health Dynamics Vol 2, No 8 (2025): August 2025
Publisher : Knowledge Dynamics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33846/hd20803

Abstract

Background: Balanced nutrition education is an essential effort in preventing obesity, especially in adolescents who are vulnerable to nutritional problems due to unhealthy diets and a lack of knowledge. This study aims to determine the effectiveness of Android-based e-pocket books in improving the understanding of balanced nutrition among adolescents in Yogyakarta. Methods: This study employed an experimental design with control groups, utilizing pre-tests and post-tests. Conducted from February to March 2023 in a high school in Yogyakarta, Indonesia, the research established a minimum sample size of 27 students per group through the Lemeshow formula and multistage sampling. Inclusion criteria required students to have Android phones, to consent to participate, to attend the study, and to complete data collection. The treatment group received education via e-pocket-book media, while the control group used e-leaflets. Knowledge was measured at three points: before the intervention, immediately after (post-test 1), and nine days later (post-test 2). Data analysis was performed using the Wilcoxon and Mann-Whitney tests with SPSS software. Results: The knowledge score of the treatment group increased from 76.3 (pre-test) to 93.8 (post-test 1) and 91.3 (post-test 2). The control group increased from 73.8 (pre-test) to 82.5 (post-test 1) and 81.3 (post-test 2). The increase in knowledge was more significant in the treatment group, showing that e-pocket-books were more effective than e-leaflets. Conclusion: Android-based e-pocket-books improve adolescents' knowledge of balanced nutrition more than e-leaflets. Digital technology in nutrition education has great potential to be applied in schools. Further research is needed to evaluate the long-term impact on nutritional behavior.
Response to Letter: Enhancing Adolescent Nutrition Knowledge Through Digital Innovation: Evaluating the Effectiveness of E-Pocket Books in Reducing Obesity. Siswati, Tri; Utami, Siti Budi; Rialihanto, Muhammad Primiaji; Susilo, Joko; Attawet, Jutharat
Health Dynamics Vol 2, No 10 (2025): October 2025 (In progress)
Publisher : Knowledge Dynamics

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

We would like to express our appreciation for the constructive input given to the article on the effectiveness of e-pocket books in improving balanced nutrition knowledge in adolescents to reduce obesity. This response aims to clarify the context of the research, answer the methodological issues raised, and affirm the empirical contribution of the study. The research is focused on improving nutrition knowledge, not on changes in nutritional status, and the term "obesity reduction" in the title describes the long-term direction of nutrition education interventions. A single 120-minute intervention was recognized to have limitations in maintaining knowledge retention, but significant results showed that e-pocket book media was effective in improving comprehension in a short period of time. The validity and reliability of the instrument have met the minimum standards for health education research in schools. In this study, the use of WhatsApp groups is not a disruptive variable, but part of a digital learning strategy to increase participant engagement. Although the research is still limited to urban schools with a small sample size, these findings are early evidence of the feasibility of e-pocket books as a digital educational medium that is lightweight, easily accessible, and in accordance with the digital habits of teenagers in general today. 
Co-Authors Abetnego, Dereks Abirama, Dhafa Alvin Suhendra Ace Iwan Suryawan, Ace Iwan Achmad Ghazali Ade Gunawan Adli, Adli Agasta, Tedy Agus Salim Agus Sulton Ahmad Nurefendi Fradana Akhmad Alim, Akhmad Al Insan Assalamfida, Muhammad Alam, Badrul Ali Akbar Alqibtiyah , Mariah Amiruddin, Arfis Amrinsyah, Rakmad Angin, Marselinus Arapenta Perangin Annisa Andriyani Apri Rahmadi Aqila, Mu’Amar Zaki ARDIANSYAH, SYAHRUL Aritonang, Reikman DP. Arya Rezagama Astried Silvanie Astutiek, Dwi Astutik, Ika Ratna Indra Attawet, Jutharat Aura, Nindya Azzahra, Intan Fatimah Bachrul Hilmi, Sectio Basuki Sri Rahayu Beny Dwi Pratama Budi Purnomo Budi, Setyo Cahyaningrum, Margareta Pramita Choirun Nisak Aulina Cindy Cahyaning Astuti Cipwati, Anggi Darmanto Darmanto Darmayati, Deby Zulkarnain Rahadian Syah Detak Prapanca Dewi Shinta Diana Susanti Didik Hariyanto Didik Hariyanto Dwi , Ristanti Dwi Nur Aini, Dwi Nur Edi Dwi Riyanto Efendi, Suryono Elyza Gustri Wahyuni Emiliana Kasmudjiastuti, Emiliana Emy Sulistyo Astuti, Emy Sulistyo Endro Sutrisno Eneng Sonia Evalina, Noorly Fahrullah, Muhammad Faisal Fajar Muharram Fanissa, Sintania Felindasari, Prisma Feri Tirtoni Ferry Adhi Dharma Fitri Adi Iskandarianto Fitrianto, Bambang Frida Kusumastuti Gulo, Fenius Gunarhadi Gunarhadi, Gunarhadi Gunawan, I Made Alit Hafiidha Sari, Raras Hanif Hanif Haris Fadillah Hastuti, Puput Tri Herning Indriastuti Hidayat, Adik Nur Hidayat, Syamsu Hikmal Maulana, Agim Himmatul , Firda Ika Ratna Palupi Imanuddin Imanuddin, Imanuddin Indrawati, Rosiana Indrawati, Rosiana Isti Dwi Puspitawati istiqomah istiqomah Jamhari Jamhari Julitia, Windi Rika Kaka, Daniel Kartika Sari, Firda Kartono , Karuniawan Puji Wicaksono Kenji Ahsan, Ava Khan, Ryan Khoirulloh Khoirulloh, Khoirulloh Kholik, Krismar Koesbandriyo, Bambang Kristiyani, Tia Kunayarti, Wahyuni Kushartanti, Woro Kuwatno Kuwatno, Kuwatno Laia, Kejar Hidup Lestari, Endah Yuliana Lily Arsanti Lestari Listiyono Santoso Lovely, Nosa Ajulva Lutfi, Mochtar M. Andi Fikri Madarina Julia Mahestika , Vanessa Maria, Ernastin Marsiah, Marsiah Maulana Yusuf Maulana, Muhammad Akbar Medha Baskara Mikael Mochammad Facta Muhammad Agus Muljanto Muhammad Luthfi Muhammad Zaki Mubarrak Munifah, Siti Mursalin . Mursyid, Abidillah Muslihatun, Wafi Nur Naomi, Novita Dhian Neni Astuti Nggebu, Sostenis Niko Fediyanto Noerviana, Annisa Putri Novi Wahyuni Nur Hazizah, Istiqomah Nurfajrin Hasan, Sri Nurul Zuriah Pamungkas, Ernanto Bayu Pramudya, Hans Prasetyaningsih, Ani Pratama, Erga Ofiananda Prayoga, Shahifa Rezaldi Puspita Sari, Sarni Handayani Puspita, Yulia Mega Putra, Kiki Pradana Putri Puspita Dewi, Angeli PUTRI WULANDARI Putri, Meilani Arindha raafi'u, brian Rafianti, Fitri Rahman, Idrus Rahmat, Feri Rahmawati, Laily Ramadhani, Gilang Ratih Pujiastuti Ravinazan, Ravinazan Rialihanto, Muhammad Primiaji Rianita Rifki Ramadhan, Muhamad Risky , Achamad Rizqi Tsania, Indah Rizqy Aziz Basuki Romadhoni, Novita Rusmiyati Rusmiyati, Rusmiyati Sabe, Syolleh Raisi Salim, Alissa Samsi Haryanto, Samsi Sanjaya, Janssen Japutra Santoso, Dian Rahma Saputri, Fatmala Reza Saputri, Rahmadya Sari, Nurratri Kurnia Sarika, Septi Budi Septyaningrum, Erna Setyawan, Hanif Hilmi Sri Anitah Sri Yamtinah Sugiono, Edi Suharto, Rachmad Budi Sujiyatini, Sujiyatini Sumarno . Suryadi Suryadi Suryani, Deby Suryono, Hasan Susanto, Adi Imron Susanto, Kevin Filbert Susatyo Handoko Suwarta, Nyoman Su’udiyah, Fidaus Syahputri, Alvina Dwi Tamam, Abas Mansur Tauji, Achmad Teguh R. Sartono Thio, Sean Edbert Titania, Dhea Adira Tjaronosari, Tjaronosari Tommy, Ervando Toto Sudargo Totok Apriyanto, Totok Tri Siswati, Tri Usman, Adam Utami, Siti Budi Vevy Liansari Vidya Mandarani Vittorio, Kevin Wilmer Wahyu Kurniawan Wahyu Taufiq Waruwu, Junieli Weni Kurdanti Widarto Jp, Widarto Jp Widhiati Widhiati, Widhiati Widyastuti Winarti, Rahayu Winata, Leonard Winda Hardyanti Wiwik Handayani Wulan Purnama Sari Wulan Safitri, Wulan Wulan Sari, Mardhayu Wuryaningsih, Dewanti Evita Julian Wulandari Yasir Hudzaifah Yeni Yeni Yodi, Ryanto Yoyok Bekti Prasetyo Yulinda yulinda Zaenuri Mastur