Forest plot of crude (Panel A) and adjusted (Panel B) odds ratios (OR) for prediction of procedural success in nonocclusive percutaneous coronary intervention (non-CTO PCI). ACC, American College of Cardiology; AHA, American Heart Association; CABG, coronary artery bypass graft; eGFR, estimated glomerular filtration rate; LVEF, left ventricular ejection fraction; MI, myocardial infarction; NYHA, New York Heart Association. * Indicates fluoroscopy time (min). Left ventricular function groups are indicated as follows: normal (52–100%) moderately reduced (41–51%), reduced (30–40%), and low (0–29%) in males; and normal (54–100%), moderately reduced (41–53%), reduced (30–40%), and severely reduced (0–29%) in females.