highly significantp < 0.0001
There was a significant heterogeneity among studies I 2 = 88.7% (95% CI: 76.3–94.6%), τ 2 = 17.32, and a highly significant Q -test ( p < 0.0001) ( 14 , 17–20 ).
There was a significant heterogeneity among studies I 2 = 88.7% (95% CI: 76.3–94.6%), τ 2 = 17.32, and a highly significant Q -test ( p < 0.0001) ( 14 , 17–20 ).
Although 14.8% ITS patients experienced gains of ≥20 dB compared to only 3.6% in the placebo group, this difference did not reach statistical significance ( p = 0.151).