Figure 4From: Unilateral versus bilateral pedicle screw fixation of minimally invasive transforaminal lumbar interbody fusion (MIS-TLIF): a meta-analysis of randomized controlled trials Forest plot: weighted mean difference (WMD) in estimated blood loss and 95% CI for unilateral versus bilateral pedicle screw fixation of MIS-TLIF. Lower blood loss in the unilateral group was observed in this forest plot.Back to article page