Abstract:
:Background Crossover dilutes treatment effect and reduces statistical power of intention-to-treat analysis. We examined incidence and impact on cardiac surgery randomized controlled trial (RCT) outcomes of crossover from experimental to control interventions, or vice versa. Methods and Results MEDLINE, EMBASE, and Cochrane Library were searched, and RCTs (≥100 patients) comparing ≥2 adult cardiac surgical interventions were included. Crossover from the initial treatment assignment and relative risks (RRs) for each trial's primary end point and mortality at longest available follow-up were extracted. All RRs were calculated as >1 favored control group and <1 favored experimental arm. Primary outcome was the effect estimate for primary end point of each RCT, and secondary outcome was all-cause mortality; both were appraised as RR at the longest follow-up available. Sixty articles reporting on 47 RCTs (25 440 patients) were identified. Median crossover rate from experimental to control group was 7.0% (first quartile, 2.0%; third quartile, 9.7%), whereas from control to experimental group, the rate was 1.3% (first quartile, 0%; third quartile, 3.6%). RRs for primary end point and mortality were higher in RCTs with higher crossover rate from experimental to control group (RR, 1.01 [95% CI, 0.94-1.07] versus RR, 0.80 [95% CI, 0.66-0.97] and RR, 1.02 [95% CI, 0.95-1.11] versus RR, 0.94 [95% CI, 0.82-1.07], respectively). Crossover from control to experimental group did not alter effect estimates for primary end point or mortality (RR, 0.82 [95% CI, 0.63-1.05] versus RR, 0.95 [95% CI, 0.86-1.04] and RR, 0.88 [95% CI, 0.73-1.07] versus RR, 1.02 [95% CI, 0.95-1.09], respectively). Conclusions Crossover from experimental to control group is associated with outcomes of cardiac surgery RCTs. Crossover should be minimized at designing stage and carefully appraised after study completion.
journal_name
J Am Heart Assocjournal_title
Journal of the American Heart Associationauthors
Gaudino M,Fremes SE,Ruel M,Di Franco A,Di Mauro M,Chikwe J,Frati G,Girardi LN,Taggart DP,Biondi-Zoccai Gdoi
10.1161/JAHA.119.013711subject
Has Abstractpub_date
2019-11-05 00:00:00pages
e013711issue
21issn
2047-9980journal_volume
8pub_type
杂志文章,meta分析abstract:BACKGROUND:Higher heart rate has been associated with an adverse prognosis, but most prior studies focused on individuals with known cardiovascular disease or examined a limited number of outcomes. We sought to examine the association of baseline heart rate with both fatal and nonfatal outcomes during 2 decades of foll...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.113.000668
更新日期:2014-05-08 00:00:00
abstract:BACKGROUND:Light chain amyloidosis (AL) is associated with high mortality, especially in patients with advanced cardiovascular involvement. It is caused by toxicity of misfolded light chain proteins (LC) in vascular, cardiac, and other tissues. There is no treatment to reverse LC tissue toxicity. We tested the hypothes...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.116.003318
更新日期:2016-06-13 00:00:00
abstract:BACKGROUND:There is paucity of knowledge concerning the specific age in youth when the associations of metabolic syndrome (MetS) begin to be operative. Thus, we investigated the relation of age to the associations of childhood MetS with adult MetS, type 2 diabetes mellitus and high carotid intima-media thickness. METH...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.117.005632
更新日期:2017-08-16 00:00:00
abstract:BACKGROUND:Recent studies using stress-rest perfusion cardiovascular magnetic resonance (CMR) demonstrated a close correlation between myocardial ischemia and reduced fractional flow reserve (FFR). However, its diagnostic concordance may be reduced in patients with multivessel disease. We sought to evaluate the concord...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.117.007736
更新日期:2018-01-26 00:00:00
abstract:BACKGROUND:Renal denervation has no validated marker of procedural success. We hypothesized that successful renal denervation would reduce renal sympathetic nerve signaling demonstrated by attenuation of α-1-adrenoceptor-mediated autotransfusion during the Valsalva maneuver. METHODS AND RESULTS:In this substudy of the...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1161/JAHA.118.009151
更新日期:2018-06-12 00:00:00
abstract:BACKGROUND:The increased adverse cardiac events in women undergoing coronary artery bypass grafting are multifactorial and may include clinical, psychosocial, and biological factors. Potential contributing biological factors could include vascular hyperreactivity of the internal mammary artery (IMA) to endogenous vasoc...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.117.007126
更新日期:2018-07-09 00:00:00
abstract::Background Reduced miR-133a was previously found to be associated with thoracic aortic ( TA ) dilation, as seen in aneurysm disease. Because wall tension increases with vessel diameter (Law of Laplace), this study tested the hypothesis that elevated tension led to the reduction of miR-133a in the TA . Methods and Resu...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.118.010332
更新日期:2019-01-08 00:00:00
abstract:BACKGROUND:Intracerebral hemorrhage (ICH) carries high risk for short-term mortality. We sought to identify race-specific predictors of mortality in ICH patients. METHODS AND RESULTS:We used 2 databases, the Johns Hopkins clinical stroke database and the Nationwide Inpatient Sample (NIS). We included 226 patients with...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.116.003540
更新日期:2016-08-16 00:00:00
abstract::See Article Lee et al. ...
journal_title:Journal of the American Heart Association
pub_type: 评论,社论
doi:10.1161/JAHA.119.012713
更新日期:2019-05-21 00:00:00
abstract:BACKGROUND:Ischemic stroke is a major cause of death and disability in the world. A major ischemic stroke subtype, large-vessel ischemic stroke (large artery atherosclerosis; LAA), has been shown to have some genetic components in individuals of European ancestry. However, it is not clear whether the genetic predisposi...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章,多中心研究
doi:10.1161/JAHA.115.003003
更新日期:2016-03-29 00:00:00
abstract:BACKGROUND:This study aimed to determine the relationship of statin therapy and cardiovascular risk factors to changes in atherosclerosis in the carotid artery. METHODS AND RESULTS:Carotid magnetic resonance imaging was used to evaluate 106 hyperlipidemic participants at baseline and after 12 months of 3-hydroxy-3-met...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.116.003621
更新日期:2016-07-13 00:00:00
abstract::Background Use of inpatient brain magnetic resonance imaging (MRI) in patients with acute ischemic stroke is highly institution dependent and has been associated with increased length and cost of hospital stay. We examined whether inpatient brain MRI in patients with acute ischemic stroke is associated with improved c...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.120.016987
更新日期:2020-10-20 00:00:00
abstract:BACKGROUND:Atherosclerosis is an inflammatory lipid disorder and the main underlying pathology of acute ischemic events. Despite a vast amount of data from murine atherosclerosis models, evidence of B-cell involvement in human atherosclerotic disease is limited. We therefore investigated the association of circulating ...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.117.005747
更新日期:2017-09-07 00:00:00
abstract:BACKGROUND:Longer QRS duration (QRSd) improves, but increased left ventricular (LV) end-diastolic volume (LVEDV) reduces, efficacy of cardiac resynchronization therapy (CRT). QRSd/LVEDV ratios differ between sexes. We hypothesized that in the EchoCRT (Echocardiography Guided Cardiac Resynchronization Therapy) trial enr...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1161/JAHA.118.009592
更新日期:2018-05-27 00:00:00
abstract::Background Past reports suggested that total-body irradiation at 0.5 to 1.0 Gy could be responsible for atherosclerosis. Peripheral artery disease ( PAD ) is a manifestation of systematic atherosclerosis. Whether the consequences of a low-to-moderate dose of radiation include increased risk of PAD remains to be determ...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.118.008921
更新日期:2018-12-04 00:00:00
abstract::Background Among people with lower extremity peripheral artery disease, obesity is associated with faster functional decline than normal weight. The association of weight loss with functional decline in peripheral artery disease is unknown. Methods and Results Adults with an ankle-brachial index <0.90 were identified ...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.118.010890
更新日期:2019-07-02 00:00:00
abstract::Background There are limited data about cardiac resynchronization therapy (CRT) in adult congenital heart disease. We aimed to assess early and late outcomes of CRT among patients with adult congenital heart disease. Methods and Results We retrospectively studied 54 patients with adult congenital heart disease (median...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.119.012744
更新日期:2019-11-05 00:00:00
abstract::Background Endovascular repair has become a viable alternative for aortic pathological features, including those located within the aortic arch. We investigated the anatomic suitability for branched thoracic endovascular repair in patients previously treated with conventional open surgery for aortic arch pathological ...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.120.016695
更新日期:2020-10-20 00:00:00
abstract:BACKGROUND:Excess accumulation of abdominal subcutaneous (SAT) and visceral adipose tissue (VAT) is associated with adverse levels of adipokines and cardiovascular disease risk. Whether fat quality is associated with adipokines has not been firmly established. This study examined the association between abdominal SAT a...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.115.002545
更新日期:2016-02-29 00:00:00
abstract:BACKGROUND:Contemporary rates of oral anticoagulant (OAC) therapy and associated outcomes among patients undergoing percutaneous coronary intervention (PCI) have been poorly described. METHODS AND RESULTS:Using data from an integrated health care system from 2009 to 2014, we identified patients on OACs within 30 days ...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.116.004310
更新日期:2016-10-17 00:00:00
abstract:BACKGROUND:There is accumulating evidence that serum levels of non-high-density lipoprotein cholesterol (non-HDL-C) are a more accurate predictor of cardiovascular outcomes when compared with low-density lipoprotein cholesterol. However, we recently found that higher serum concentrations of triglycerides are associated...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.118.009096
更新日期:2018-06-09 00:00:00
abstract::Background Hypertrophic cardiomyopathy is caused by pathogenic sarcomere gene variants. Individuals with a thin-filament variant present with milder hypertrophy than carriers of thick-filament variants, although prognosis is poorer. Herein, we defined if decreased energetic status of the heart is an early pathomechani...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.119.015316
更新日期:2020-04-21 00:00:00
abstract:BACKGROUND:Genome-wide association studies identified ADAMTS7 as a risk locus for coronary artery disease (CAD). Functional studies suggest that ADAMTS7 may promote cellular processes in atherosclerosis. We sought to examine the association between genetic variation at ADAMTS7 and measures of atherosclerosis using hist...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章,多中心研究
doi:10.1161/JAHA.117.006928
更新日期:2017-10-31 00:00:00
abstract:BACKGROUND:Greater understanding of differences between men and women with coronary heart disease is needed. METHODS AND RESULTS:In this post hoc analysis of the STABILITY (Stabilization of Atherosclerotic Plaque by Initiation of Darapladib Therapy) trial, we described psychosocial factors, treatments, and outcomes of...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1161/JAHA.117.006695
更新日期:2017-09-14 00:00:00
abstract:BACKGROUND:A high consumption of omega-3 long-chain polyunsaturated fatty acids, and particularly docosahexaenoic acid (DHA), has been suggested to reduce the risk of cardiovascular disease (CVD). However, while DHA supplementation may have benefits for secondary prevention, few studies have investigated the role of DH...
journal_title:Journal of the American Heart Association
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1161/JAHA.113.000283
更新日期:2013-07-01 00:00:00
abstract::Background The current study aims to validate the accuracy of 3-dimensional speckle-tracking echocardiography (3D-STE) in evaluating biventricular functions against the accuracy of cardiac magnetic resonance (CMR) and to explore the comprehensive characteristics and normal values for 3D-biventricular functions in tran...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.119.015742
更新日期:2020-05-18 00:00:00
abstract:BACKGROUND:Cardiac mesenchymal cell (CMC) administration improves cardiac function in animal models of heart failure. Although the precise mechanisms remain unclear, transdifferentiation and paracrine signaling are suggested to underlie their cardiac reparative effects. We have shown that histone deacetylase 1 (HDAC1) ...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.117.006183
更新日期:2017-07-05 00:00:00
abstract::Background Stroke is a serious complication of hypertensive disorders of pregnancy (HDP), with potentially severe and long-term sequelae. However, the temporal trends, predictors, and outcomes of stroke in women with HDP at delivery remain unknown. Methods and Results All HDP delivery hospitalizations with or without ...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.120.016182
更新日期:2020-08-04 00:00:00
abstract::Background Exposure to fine airborne particulate matter ( PM 2.5) induces quantitative and qualitative defects in bone marrow-derived endothelial progenitor cells of mice, and similar outcomes in humans may contribute to vascular dysfunction and the cardiovascular morbidity and mortality associated with PM 2.5 exposur...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.119.013041
更新日期:2019-07-02 00:00:00
abstract::Background Genetic testing in pediatric primary dilated cardiomyopathy (DCM) patients has identified numerous disease-causing variants, but few studies have evaluated genetic testing outcomes in this population in the context of patient and familial clinical data or assessed the clinical implications of temporal chang...
journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.120.016195
更新日期:2020-06-02 00:00:00