Manullang, S.; Sinaga, M. S.; Sinambela, P. N. J. M.; Nadya, F. SURVIVAL ANALYSIS OF CORONARY HEART DISEASE PATIENTS USING THE KAPLAN-MEIER METHOD AND COX PROPORTIONAL HAZARDS REGRESSION (BRESLOW METHOD). BAREKENG: J. Math. & App. 2026, 20, 2213-2228.