25(OH)D	25-hydroxyvitamin D
Ca	Calcium
CI	Confidence Interval
CKD	Chronic Kidney Disease
CKD-EPI	Chronic Kidney Disease Epidemiology Collaboration
CKD-MBD	Chronic Kidney Disease–Mineral and Bone Disorder
eGFR	Estimated Glomerular Filtration Rate
FGF23	Fibroblast Growth Factor 23
IQR	Interquartile Range
log	Natural logarithm
MICE	Multiple Imputation by Chained Equations
PO4	Phosphate
PTH	Parathyroid Hormone
R2	Coefficient of Determination
RMSE	Root Mean Square Error
SD	Standard Deviation
SHAP	SHapley Additive exPlanations
UACR	Urine Albumin-to-Creatinine Ratio
XGBoost	Extreme Gradient Boosting