Operative time
We found nineteen studies that reported operative time with a total
number of interventions (n=1414). The average operative time was (77.7 ±
24.5) min for the ET group and (91.7 ± 18.8) min for the MT group. In
the pooled analysis (Figure 2A), endoscopic tympanoplasty (ET) showed a
highly significant
decrease in mean operative time compared to microscopic tympanoplasty
(MT) (SMD: -1.33;
95% CI -1.95 to -0.72; p < 0.0001). However, highly
significant heterogeneity (I2 = 96%, p <
0.00001) and publication bias were found (Figure 2B).