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Sains Malaysiana 55(4)(2026): 756-773

http://doi.org/10.17576/jsm-2026-5504-14

 

Bayesian Logistic Regression to Explore the Role of Complete Blood Count in Kidney Disease Mortality

(Regresi Logistik Bayesian untuk Meneroka Peranan Kiraan Darah Lengkap dalam Kematian Penyakit Ginjal)

 

DG SITI NURISYA SAHIRAH AG ISHA1, NURLIYANA JUHAN2,*, YONG ZULINA ZUBAIRI3, NORNAZIRAH AZIZAN4, CHONG MUN HO1, ABU SAYED MD. AL MAMUN5 & QIN ZHI LEE6

 

1Faculty of Science and Technology, Universiti Malaysia Sabah, Jalan UMS, 88400 Kota Kinabalu, Sabah, Malaysia

2Preparatory Centre for Science and Technology, Universiti Malaysia Sabah, Jalan UMS, 88400 Kota Kinabalu, Sabah, Malaysia

3Institute for Advanced Studies, University of Malaya, 50603 Kuala Lumpur, Malaysia

4Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Jalan UMS, 88400 Kota Kinabalu, Sabah, Malaysia

5Department of Statistics, University of Rajshahi, Rajshahi, Bangladesh

6Queen Elizabeth Hospital, Locked Bag No. 2029, 88586 Kota Kinabalu, Sabah, Malaysia

 

Received: 4 July 2025/Accepted: 20 April 2026

 

Abstract

Kidney disease is a major global health challenge, ranking fifth in Malaysia and ninth worldwide as a leading cause of death in 2021. This growing burden highlights the need for cost-effective tools to support early identification of patients at risk of mortality. The complete blood count (CBC) is an affordable, widely used diagnostic test, while Bayesian methods offer advantages for incorporating prior knowledge and quantifying uncertainty. However, the use of CBC parameters with Bayesian approaches for mortality prediction among kidney disease patients in Malaysia remains limited. This study aimed to develop a risk stratification model for kidney disease mortality using CBC data and Bayesian logistic regression (BLR). A retrospective study was conducted using data from 5,158 patients with kidney disease treated at Queen Elizabeth I Hospital. The final multivariate BLR model identified 13 significant predictors of mortality. The strongest predictors were low haemoglobin, high mean platelet volume (MPV), and high neutrophil-to-lymphocyte ratio (NLR), followed by high white blood cells (WBC), and hospitalisation history. The model demonstrated good calibration and discrimination, with an area under the receiver operating characteristic curve (AUROC) and area under the precision-recall curve (AUPRC) greater than 0.8, supporting its reliability for mortality risk stratification. These findings suggest that combining CBC parameters with demographic information may improve early detection and clinical decision-making, particularly in resource-limited settings.

 

Keywords: Bayesian logistic regression; complete blood count; kidney disease; mortality; risk stratification

 

Abstrak

Penyakit buah pinggang merupakan cabaran kesihatan global yang utama, menduduki tempat kelima di Malaysia dan kesembilan di peringkat dunia sebagai penyebab utama kematian pada tahun 2021. Beban yang semakin meningkat ini menekankan keperluan terhadap alat diagnostik yang kos efektif untuk memudahkan pengesanan awal. Kiraan darah lengkap (KDL) merupakan ujian diagnostik yang berpatutan dan digunakan secara rutin, manakala kaedah Bayesian menawarkan kelebihan dengan menggabungkan pengetahuan terdahulu dan memberikan pengkuantitian ketakpastian yang lebih tepat. Walau bagaimanapun, penggunaan parameter KDL dan Bayesian bagi meramal kematian dalam kalangan pesakit buah pinggang di Malaysia masih terhad. Kajian ini bertujuan untuk membangunkan model stratifikasi risiko bagi kematian akibat penyakit buah pinggang menggunakan KDL dan regresi logistik Bayesian (BLR). Kajian retrospektif ini menganalisis data daripada 5,158 pesakit buah pinggang dari Hospital Queen Elizabeth I. Model BLR multivariat akhir mengenal pasti 13 peramal kematian yang signifikan. Peramal yang paling kuat ialah hemoglobin rendah, min isi padu platelet (MPV) yang tinggi dan nisbah neutrofil kepada limfosit (NLR) yang tinggi, diikuti oleh sel darah putih (WBC) yang tinggi dan sejarah kemasukan ke hospital. Model menunjukkan prestasi penentukuran dan diskriminasi yang baik, dengan kawasan bawah lengkungan dalam menerima ciri operasi (AUROC) dan kawasan di bawah lengkung penarikan balik ketepatan (AUPRC) melebihi 0.8, sekali gus menyokong kebolehpercayaannya untuk stratifikasi risiko kematian. Penemuan ini mencadangkan bahawa penggabungan parameter KDL dengan maklumat demografi berpotensi meningkatkan pengesanan awal pesakit berisiko dan keputusan klinikal, khususnya dalam persekitaran dengan sumber terhad.

Kata kunci: Bayesian regresi logistik; kiraan darah lengkap; kematian; penyakit buah pinggang; stratifikasi risiko

 

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*Corresponding author; email: liyana87@ums.edu.my

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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