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PENGEMBANGAN SISTEM AI HEALTH AGENT UNTUK PREDIKSI PENYAKIT JANTUNG MENGGUNAKAN XGBOOST DAN EXPLAINABLE AI I Putu Mahendra Putra; Adie Wahyudi Oktavia Gama
Berajah Journal Vol. 6 No. 4 (2026): Berajah Journal
Publisher : CV. Lafadz Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47353/bj.v6i4.687

Abstract

Opaque model decisions remain a practical barrier to the use of machine learning in heart disease screening. This study presents HeartXplain, a web-based AI Health Agent designed as a Clinical Decision Support System for early screening. The system combines XGBoost, Particle Swarm Optimization (PSO), SHAP, LIME, and interpretative narratives generated by a Large Language Model (LLM). The model was trained on 69,105 records represented by 19 clinical and engineered features. PSO optimized a recall-oriented objective, followed by decision-threshold adjustment. At a threshold of 0.4997, the model achieved 71.01% accuracy, 80.08% recall, 67.39% precision, a 73.19% F1-score, 79.29% AUC-ROC, and 78.05% PR-AUC; false negatives decreased from 1,367 to 1,360. SHAP and LIME exposed global and patient-level feature contributions, while the LLM translated those outputs into a more readable narrative. MAPIE reached 95.01% empirical coverage and 83.02% accuracy on singleton sets. Fairlearn indicated minor sex-based differences but wider gaps across age groups. HeartXplain therefore provides a transparent supporting layer for early screening, not a substitute for clinical examination, diagnosis, or professional judgment. External validation on real clinical data remains necessary.
Co-Authors Adhiya Garini Putri, Dewa Ayu Agus Ariana, I Komang Ajeng Ayu Fitri Ariatmaja Ariesta, Ni Luh Wina Sinta Arta, Kadek Ananda Dwi Pebri Arya Putra Sanjaya, I Ketut Gede Bunga, Melania Pritama Danang Utomo Dananjaya, Md. Wira Putra Darma, I Gede Wahyu Surya Darmaastawan, Kadek Davi, Nadine Kalina Dennatan, Monalisa Devi Anggreni, Ni Komang Ayu Devi, Ni Kadek Sintya Dewa Ayu Putu Adhiya Garini Putri Dewa Gede Hendra Divayana, Dewa Gede Hendra Dewi Puspita Ningrat, Qorry Diantari, Putu Yuliska Dimas Rangga Marshandika Dwi Sanjani Mertaningsih, Ni Kadek Gede Hendra Divayana, Dewa Gede Humaswara Prathama Ginanita Utami, Cokorda Istri Ustana Grren, Agustini Degni Melsy Gunanti, A A Istri Indah Paristya Gunawan, Putu Vina Junia Antarista Gusi Putu Lestara Permana Gusti Ngurah Darma Paramartha, I Hari Putri, Tasya Prajna Pratisthita Hayu Mas Wrespatiningsih I Dewa Putu Arjun Suhartana Wisesa I G. N. Oka Ariwangsa I Gede Artha Negara I Gusti Ayu Cintya Wardani I Gusti Ayu Intan Candra Dewi I Gusti Ngurah Darma Paramartha I Gusti Ngurah Putu Dharmayasa I Gusti Putu Riyan Nugraha I Kadek Dwi Yudiarsana Dharma I ketut Gede Darma Putra I Made Ardana I Made Ardi Sudestra I Made Riski Aditya Darma I Made Sudiksa I Made Wirya Darma I Nyoman Gde Artadana Mahaputra Wardhiana I Nyoman Gde Artadana Mahaputra Wardhiana I Nyoman Hary Kurniawan I Nyoman Rizky Anggika I Putu Agung Bayupati I Putu Mahendra Putra I Putu Wisna Ariawan I Wayan Abimayu Angga Nugraha I Wayan Aditya Suranata I Wayan Dikse Pancane I Wayan Sukadana I Wayan Sukadana I Wayan Sutama I Wayan Sutama Irma Suryanti Ivan Surya Pramana Putra, Kadek Bagus John Junieargo Timotius John Timotius Junieargo Kadek Devi Kalfika Anggaria Wardani Kadek Devi Kalfika Anggria Wardani Kadek Prasilia Candra Dewi Komang Bagus Novan Bayu Pramana Putra Kurniawan, I Nyoman Hary Lin, Fanny Made Jana Narendra Made Widnyani, Ni Maharani, Faradita Putri Aura Maulidan, Bagus Maw, Me Me Md. Wira Putra Dananjaya Musawer Hakimi Negara, I Gede Artha Negara, Komang Ayu Aprillia Puspa Ngakan Nyoman Kutha Krisnawijaya Ngurah Komang Wiradnyana Ni Kadek Nadya Kartika Paramita Ni Komang Sintya Dewi Ni Luh Putu Ika Candrawengi Ni Made Ochiana Septhi Pratiwi Ni Nyoman Triana Margareta Ni Putu Jenifer Febriari Ni Putu Widayanti Ni Wayan Ariningsih Nilton Da Conceicao Marques Nimadeni Yuniartika Nur Aprilya, Fira Nurullita Wardani, Venti Oktama Setyawan, I Kadek P. WAYAN ARTA SUYASA Permana, Putu Indra Pertama, Gusti Putu Lestara Praditya Maha Wiguna, I Made Putra, Komang Satria Wibawa Putri Prema Paramitha Putu Emy Samiadnyani Putu Purnama Dewi Putu Riska Indah Mentari putu suparna, putu Rena Mariani, Ni Wayan Sastra Dewanti, Wayan Ari Sudestra, I Made Ardi Sugiana, I Putu Sugiharni, Gusti Ayu Dessy Suputra, Komang Yudi Swari, Luh Gede Widi T Krisna Narayana, Made Gede Bagus Theresia Ananda Eleonora Wardhiana, Nyoman Dana Wayan Sugandini Widnyani, Ni Made Wisesa, I Dewa Putu Arjun Suhartana