Abstract
Introduction: Clinical practice guidelines have recommended evidence based medicine (EBM) and treatment targets for optimal management of BP, LDL Cholesterol (LDLc) and of HbA1c in diabetic patients with stable coronary heart disease [CHD]. However the importance of achieving these goals is uncertain. Hypothesis: In patients with stable CHD achievement of goals for blood pressure, LDLc, and HbA1c in diabetics, and use of EBM are associated with a lower risk of major adverse cardiovascular events [MACE]. Methods: In 13,624 patients with stable CHD, who participated in the STabilisation of Atherosclerotic plaque By Initiation of darapLadIb TherapY (STABILITY) trial, BP, LDLc and HbA1c in diabetes were assessed at baseline, and at 3, 6 and 12 month follow-up visits; BP and medication use were additionally assessed at 1 month. EBM; aspirin, beta blockers, ACE / ARB, and statins, were recommended for patients without contraindications. Standard of care (SOC) targets were BP<140/90 mmHg, LDLc <70mg/dl and <100mg/dl, and HbA1c<7% in 4711 diabetics. Achievement of each of these targets was defined as meeting the target on ≥4 of 5 visits for BP and EBM, and ≥3 of 4 biochemical measurements. A landmark analysis assessed the association between achievement of EBM and of each SOC target during the first year of the study and MACE, defined as cardiovascular death, MI, or stroke, during a further 2.7 years follow-up, after adjusting for baseline predictors of MACE in a Cox proportional hazards model. Results: See Table. Conclusions: High rates of evidence based medicine use were achieved. MACE was related to LDLc. After one year the risk of subsequent MACE was reduced for patients who met target LDLc levels and for diabetic patients who achieved target HbA1c.
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