Complications
The number of complications that occurred in each group from the studies
was combined in a meta-analysis, as shown in Figure 2. Hence, the
calculated I2 showed no heterogeneity, and the
fixed-effect model was used to calculate the risk ratio (RR). There was
a trend of a lower risk of complications with the use of IGS, although
it did not reach statistical significance (risk ratio: 0.53; 95%
confidence interval, 0.20-1.41; p = 0.20).29-31