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Bambang Widjanarko Otok
Departemen Statistika Institut Teknologi Sepuluh Nopember
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Journal : Media Statistika

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RANDOM EFFECTS META-REGRESSION USING WEIGHTED LEAST SQUARES (CASE STUDY: EFFECTIVENESS OF ACCEPTANCE AND COMMITMENT THERAPY IN REDUCING DEPRESSION) Arumningtyas, Felinda; Otok, Bambang Widjanarko; Purnami, Santi Wulan
MEDIA STATISTIKA Vol 18, No 1 (2025): Media Statistika
Publisher : Department of Statistics, Faculty of Science and Mathematics, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/medstat.18.1.49-60

Abstract

Meta-analysis is a statistical method for synthesizing quantitative data from multiple related studies, yet heterogeneity among studies often complicates interpretation. Meta-regression extends this approach by incorporating study-level covariates to explain variations in outcomes. With the global increase in depression, Acceptance and Commitment Therapy(ACT) has attracted attention as an effective psychological intervention. Therefore, a deeper understanding of the factors that influence its effectiveness across studies is needed. However, to date, only a few meta-analyses have quantitatively examined moderator variables that influence ACT outcomes using a random effects meta-regression approach. This study aims to fill this gap. This study estimated the model parameters using the Weighted Least Squares (WLS) method. Thirty-three published studies testing the effectiveness of ACT in reducing depression were collected from PubMed, Google Scholar, and Science Direct. The homogeneity test results showed significant heterogeneity, supporting the use of a random effects model. The combined effect size of -0.321 indicates that ACT significantly reduces depression levels compared to the control group. Meta-regression analysis revealed that variation in effect size was significantly influenced by differences in the average age of patients and duration of therapy. These findings provide new insights into the conditions and characteristics that make ACT therapy more effective.
Co-Authors Abdul Khair Abima Aunur Rochman Achmad Choiruddin Adeni - Adeni Agus Suharsono Ahsan, Muhammad Akbar, Mhd Furqan Alfasanah, Zulfani Amin Tohari Angga Dwi Mulyanto Anggra Ayu Rucitra, Anggra Ayu Anisa Ramadhan Aqsari, Hasri Wiji Ari Fitriani Arief Wibowo Arief Wibowo Arifah Nur Ngafiyah, Arifah Nur Arli, Denni Asih Kurniasih Lumaela Balami, Abdul Malik Choiruddin, Achmad Cindy Cahyaning Astuti Darwis Darwis Diah Puspito Wulandari Dimas Achmad Fadhila Dukalang, Hendra Ekasari, Nazihah Eko Saputro Eko Saputro Eta Dian Ayu A, Eta Dian Felinda Arumningtyas Fredi Suryadi Fredi Suryadi Ghazali, Muhammad Hadi, Abdul Razak Abdul Handoko, Wisnu Hargandi, Priyanka Harmin Sulitiyaning Titah Harun Al Azies Haryanto, Albertus Eka Putra Hasanah, Silviatul Herlina Jusuf I Nyoman Budiantara Ikacipta Mega Ayuputri Isnawati Iwan Kurniawan Jerry D. T. Purnomo Koesmono, Teman Kurniawan, Muhammad Idham Mahpolah Mahpolah Masnatul Laili Mastari Rizki Fadillah Millatur Rodliyah muhammad mashuri Muhammad Zulfadhli, Muhammad Nathanel, Jeshen Oktavian ningrum, amanda ratna Noer, Lissa Rosdiana Oktiva Dhani Arleina Onn, Choo Wou Pangesti, Riwi Dyah Purhadi Purhadi Rahmawati Erma Standsyah Rakhmah Wahyu Maya Rama Hiola Riza Inayah Sabar Sabar Santi Martini Santi Wulan Purnami Sarmanu, Sarmanu Setiawan, Ariyono Shofi Andari Shofi Andari Sri Harini Sri Haryatmi Subanar . Subanar, . Sugiharto Sh Suharto Suharto Suharto Suharto Suharto Suharto suhartono - Suroto Suroto Suryo Guritno Suryo Guritno Sutikno Sutikno Sutikno Sutikno Wahyuning Pintowati Wati, Nurul Linda Wiwiek Natalya Yoyok Setyo Hadiwidodo