title: Effect of angiotensin-converting enzyme inhibitors and angiotensin II receptor blockers on all-cause mortality, cardiovascular deaths, and cardiovascular events in patients with diabetes mellitus: a meta-analysis.
abstract: OBJECTIVE
  Angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin II receptor blockers (ARBs) may have different effects on cardiovascular (CV) events in patients with diabetes mellitus (DM).
  
  
  OBJECTIVE
  To conduct a meta-analysis to separately evaluate the effects of ACEIs and ARBs on all-cause mortality, CV deaths, and major CV events in patients with DM. DATA SOURCES Data sources included MEDLINE (1966-2012), EMBASE (1988-2012), the Cochrane Central Register of Controlled Trials, conference proceedings, and article reference lists.
  
  
  METHODS
  We included randomized clinical trials reporting the effects of ACEI and ARB regimens for DM on all-cause mortality, CV deaths, and major CV events with an observation period of at least 12 months. Studies were excluded if they were crossover trials.
  
  
  METHODS
  Dichotomous outcome data from individual trials were analyzed using the risk ratio (RR) measure and its 95% CI with random-effects models. We estimated the difference between the estimates of the subgroups according to tests for interaction. We performed meta-regression analyses to identify sources of heterogeneity.
  
  
  METHODS
  Primary end points were all-cause mortality and death from CV causes. Secondary end points were the effects of ACEIs and ARBs on major CV events.
  
  
  RESULTS
  Twenty-three of 35 identified trials compared ACEIs with placebo or active drugs (32,827 patients) and 13 compared ARBs with no therapy (controls) (23,867 patients). When compared with controls (placebo/active treatment), ACEIs significantly reduced the risk of all-cause mortality by 13% (RR, 0.87; 95% CI, 0.78-0.98), CV deaths by 17% (0.83; 0.70-0.99), and major CV events by 14% (0.86; 0.77-0.95), including myocardial infarction by 21% (0.79; 0.65-0.95) and heart failure by 19% (0.81; 0.71-0.93). Treatment with ARBs did not significantly affect all-cause mortality (RR, 0.94; 95% CI, 0.82-1.08), CV death rate (1.21; 0.81-1.80), and major CV events (0.94; 0.85-1.01) with the exception of heart failure (0.70; 0.59-0.82). Both ACEIs and ARBs were not associated with a decrease in the risk for stroke in patients with DM. Meta-regression analysis showed that the ACEI treatment effect on all-cause mortality and CV death did not vary significantly with the starting baseline blood pressure and proteinuria of the trial participants and the type of ACEI and DM.
  
  
  CONCLUSIONS
  Angiotensin-converting enzyme inhibitors reduced all-cause mortality, CV mortality, and major CV events in patients with DM, whereas ARBs had no benefits on these outcomes. Thus, ACEIs should be considered as first-line therapy to limit excess mortality and morbidity in this population.
authors.affiliation: Kidney Disease Center, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Cheng
authors.affiliation: Department of Nephrology, Hangzhou Red Cross Hospital, Hangzhou, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Kidney Disease Center, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China.
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Kidney Disease Center, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Han
authors.affiliation: Kidney Disease Center, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China.
authors.forename: Xiayu
authors.initials: X
authors.lastname: Li
authors.affiliation: Kidney Disease Center, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China.
authors.forename: Xuelin
authors.initials: X
authors.lastname: He
authors.affiliation: Kidney Disease Center, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China.
authors.forename: Qun
authors.initials: Q
authors.lastname: Li
authors.affiliation: Kidney Disease Center, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China.
authors.forename: Jianghua
authors.initials: J
authors.lastname: Chen
mesh_terms: D057911:Angiotensin Receptor Antagonists / Q000627:therapeutic use*; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000627:therapeutic use*; D002318:Cardiovascular Diseases / Q000188:drug therapy* / Q000401:mortality / Q000517:prevention & control; D002423:Cause of Death; D048909:Diabetes Complications / Q000517:prevention & control; D003920:Diabetes Mellitus / Q000188:drug therapy*; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012044:Regression Analysis; D016896:Treatment Outcome
chemical_list: D057911:Angiotensin Receptor Antagonists; D000806:Angiotensin-Converting Enzyme Inhibitors