1. Off-pump versus on-pump coronary artery bypass: meta-analysis of currently available randomized trials 
Alessandro Parolari, MD, PhD, Francesco Alamanni, MD, Aldo Cannata, MD, Moreno Naliato, MD, Luigi Bonati, MD, Patrizia Rubini, MD, PhD, Fabrizio Veglia, PhD, Elena Tremoli, PhD, Paolo Biglioli, MD 
The Annals of Thoracic Surgery 
Volume 76, Issue 1, Pages (July 2003)
DOI: /S (03)

2. Fig 1
Meta-analysis of the combined end point (death, myocardial infarction, and stroke occurring during the first 30 days postoperatively) in nine controlled trials of off-pump (OPCAB) versus on-pump (CABG) coronary artery bypass grafting. Squares indicating individual trial differences are scaled according to weighting in the meta-analysis. The width of the diamond for pooled data denotes the lower and upper 95% confidence intervals (CI). Note that the x-axis is logarithmic. (BHACAS = Beating Heart Against Cardioplegic Arrest Studies; OR = operating room.)
The Annals of Thoracic Surgery  , 37-40DOI: ( /S (03) )