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I Gusti Ngurah Darma Paramartha
Universitas Pendidikan Nasional
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Journal : Journal of Technology and Informatics (JoTI)

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Comparative Performance of Machine Learning Algorithms for Diabetes Prediction Sudestra, I Made Ardi; Gama, Adie Wahyudi Oktavia; Prathama, Gede Humaswara; Paramartha, I Gusti Ngurah Darma; Hakimi, Musawer
Journal of Technology and Informatics (JoTI) Vol. 8 No. 1 (2026): Vol. 8 N. 1 (2026)
Publisher : Universitas Dinamika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37802/joti.v8i1.1195

Abstract

Early detection of diabetes mellitus is crucial to prevent severe complications. This study evaluates three machine learning algorithms for diabetes prediction using a quantitative comparative experimental design. The algorithms are k-Nearest Neighbors (k-NN), Support Vector Machine (SVM), and Random Forest. These methods were chosen to compare distinct learning paradigms. k-NN is distance-based, SVM is margin-based, and Random Forest is an ensemble method. The goal is to find the optimal model for clinical use. The Pima Indians Diabetes dataset was used. It includes 390 patients and 15 clinical features. Performance was measured by accuracy, precision, recall, and F1-score. Random Forest had the highest accuracy (89.7%) and F1-score, providing the most balanced classification. SVM followed with 84.6%, and k-NN achieved 76.9%. Although k-NN had the highest recall (0.750), its precision was low (0.375), showing a high false-positive rate. Feature importance analysis pointed to blood glucose levels as the most significant predictor, which matches clinical knowledge. In summary, ensemble techniques like Random Forest offer the most reliable results. This highlights the importance of selecting the right algorithm for early diabetes detection in clinical applications.
Co-Authors A.A. Gde Adi Indrawan, A.A. Gde Adie Wahyudi Oktavia Gama Agus Ariana, I Komang Anak Agung Gede Sugianthara Anak Agung Istri Agung Maheswari Anak Agung Sagung Mas Anastassia Nawang Asri Angelyn Gavryla Anggit Septio Budi Ardiana Reswari, Ni Putu Puja Ariesta, Ni Luh Wina Sinta Ayu Fiqih Wulandari Ayu Satya Kartika Dananjaya, Md Wira Putra Dananjaya, Md. Wira Putra Dandy Pramana Hostiadi Dedy Panji Agustino, Dedy Panji Devi Anggreni, Ni Komang Ayu Gde Brahupadhya Subiksa Gede Angga Rista, Gede Angga Gede Humaswara Prathama Gede Ngurah Indra Arya Aditya Grren, Agustini Degni Melsy Gusi Putu Lestara Permana Hakimi, Musawer Hesty Pahlevy Setyo Rini Hiu, Victor I G. N. Oka Ariwangsa I Gede Harsemadi I Gusti Ayu Cintya Wardani I Gusti Ayu Dewi Suardi, I Gusti Ayu Dewi I Gusti Ayu Intan Candra Dewi I Gusti Ayu Rosy Agustini, I Gusti Ayu I Gusti Rai Agung Sugiartha I Kadek Arta Wiguna I Ketut Sedana Artha, I Ketut Sedana I Ketut Suada I Made Hendriek Prasetia I Made Sindhu Yoga I Made Sudiksa I Nym. Yudi Anggara Wijaya, I Nym. Yudi I Nyoman Hary Kurniawan I Putu Adi Wijaya, I Putu I Putu Indra Agastya Lupika Jaya, I Putu Indra Agastya I Putu Widiantara, I Putu I Wayan Aditya Suranata I Wayan Dikse Pancane Ida Ayu Winda Juniari Ida Bagus Ketut Surya Arnawa, Ida Bagus Ketut Surya Indra Gunawan, Moh. Sayful Intan Adhisti, Sagung Istri Iskandar, Revival Xavier John Junieargo Timotius Kadek Adyatna Wedananta Kadek Adyatna Wedananta Kadek Darmaastawan Kadek Laras Oktiana Kumala Dewi Latupeirissa, Jonathan Jacob Paul M Febrian Eibim Adzariatulah Maharani, Ni Komang Natasya Mario Oktavianus, Mario Ngakan Nyoman Kutha Krisnawijaya Nyoman Ayu Nila Dewi Octavia Gama, Adie Wahyudi Pande Kadek Yudiarta, Pande Kadek Permana, Putu Indra Putra, Komang Satria Wibawa Putu Gede Arya Sumertayasa Putu Gita Pujayanti Putu Purnama Dewi Putu Riska Indah Mentari Ricky Aurelius Nutanto Diaz, Ricky Aurelius Santhi Mitha Tridorade Geot Satria Yogananda Sofyan, Yohanes Samuel Sudestra, I Made Ardi Suputra, Komang Yudi Teguh Hari Martha, Teguh Hari Widnyani, Ni Made Wirawan, Made Surya Yohanes Priyo Atmojo Yohanes Priyo Atmojo, Yohanes Priyo