“…Seventeen studies were excluded as per the exclusion criteria and a total of 20 studies [ 1 , 7 , 8 , 12 – 28 ] were included for qualitative analysis. Comparative meta-analysis was performed from 14 studies [ 1 , 8 , 15 , 16 , 19 – 28 ] for 30 days mortality, from 4 studies [ 8 , 16 , 17 , 22 ] for in-hospital mortality, and 6 each for the length of hospital stay [ 1 , 8 , 15 , 17 , 25 , 28 ] and number of complications. [ 1 , 8 , 14 , 18 , 22 , 26 ]…”