• Singap Med J · Aug 2024

    Prevalence and outcomes associated with hypocalcaemia and hypercalcaemia among pre-dialysis chronic kidney disease patients with mineral and bone disorder.

    • YongMei Hui AmandaMHADepartment of Pharmacy, Singapore General Hospital, Singapore., Jun Jie Benjamin Seng, TanYing Lin CherylYLCDepartment of Pharmacy, Singapore General Hospital, Singapore., Jiunn Wong, and Priscilla How.
    • Department of Pharmacy, Singapore General Hospital, Singapore.
    • Singap Med J. 2024 Aug 1; 65 (8): 421429421-429.

    IntroductionChronic kidney disease-mineral and bone disease (CKD-MBD) is a complication of chronic kidney disease (CKD) involving derangements in serum calcium and phosphate. This study aims to evaluate hypo- and hypercalcaemia and their associated outcomes among pre-dialysis CKD patients.MethodsA retrospective cohort study was performed and included all adult CKD stage 4-stage 5 patients who were on treatment for CKD-MBD between 2016 and 2017. Each patient was followed up for 3 years. Hypo- and hypercalcaemia were defined as serum corrected calcium (Ca 2+ ) <2.10 and >2.46 mmol/L, respectively. Outcomes evaluated included all-cause mortality and cardiovascular events. Multivariate Cox regression analysis was done to evaluate the association of hypocalcaemia and/or hypercalcaemia with the clinical outcomes. Severity of hypocalcaemia episode was classified as 'mild' (Ca 2+ : between 1.90 and 2.10 mmol/L) and 'severe' (Ca 2+ : <1.90 mmol/L). Severity of hypercalcaemia was classified as 'mild' (Ca 2+ : between 2.47 and 3.00 mmol/L), moderate (Ca 2+ : between 3.01 and 3.50 mmol/L) and severe (Ca 2+ : >3.50 mmol/L).ResultsOf the 400 patients, 169 (42.2%) and 94 (23.5%) patients experienced hypocalcaemia and hypercalcaemia, respectively. Severe hypocalcaemia was more prevalent in CKD stage 5 compared to CKD stage 4 (96 [40.5%] vs. 36 [25.9%], P = 0.004). Results from multivariate analyses after adjustment showed that hypocalcaemia and/or hypercalcaemia were not associated with all-cause mortality ( P > 0.05) or the occurrence of cardiovascular events ( P > 0.05).ConclusionHypocalcaemia and hypercalcaemia episodes were prevalent among pre-dialysis CKD patients. Studies with longer follow-up durations are required to assess the effects of calcium derangements on clinical outcomes.Copyright © 2024 Copyright: © 2024 Singapore Medical Journal.

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