Outcomes measured
Primary outcome was in-hospital mortality (all causes) and overall post-operative LOS.
Secondary outcomes included: mechanical ventilation time and intensive care unit (ICU) stays (for the surgical cohorts only), post-operative renal failure (defined as increase in serum creatinine of more than 1.5X over seven-day duration), disabling stroke and need for red blood cells transfusion (RBC) (2 or more units of red blood cell transfused). Independent predictors associated to in-hospital mortality and post-operative LOS were investigated.
For the overall MetS and no-MetS group, in hospital survival probability and in between centres variability was also explored.