“…High quality evidence at the outcome level suggested no difference in rate of SSI when wound drainage systems were used. This was based on a meta-analysis (N=2443) of twelve studies 10,11,13,23,[28][29][30]33,39,40,44,45 which found no significant difference in rate of SSI (RD=0.001, 95% CI -0.006 to 0.007, p-0.844). Further sub-group meta-analyses of adult patients undergoing decompression-only lumbosacral surgery (5 studies 11,28,29,44,50 , N=950), and of adult patients undergoing lumbosacral fusion surgery (4 studies 11,33,40,45 , N=643), and patients with adolescent idiopathic scoliosis (2 studies 10,13 , N=530) similarly demonstrates no significant differences in the rate of SSI when wound drainage is used postoperatively.…”