“…Of these studies, 12 were excluded for various reasons: 3 used other variable definitions of obesity [2,12,13]; 5 compared outcomes in tertiles or quartiles of BMI [14][15][16][17][18]; 1 evaluated the clinical outcomes of patients with morbidly obese [19]; and 2 were review [1,20]. In total, eight observational studies published between 2002 and 2009 matched the inclusion criteria and were therefore included [4-9, 21, 22].…”