3.1 | Demographics
Eighty-eight patients with unilateral SSNHL performed ASSR testing. Of these, 35 patients with ASSR thresholds above 90 dB HL were excluded (Fig. 1). A total of 53 patients (23 men and 30 women) with a mean age of 48.9 ± 16.1 (range 8-78) years were finally included in the study. Twenty-one patients were included in the WASSR group and 32 patients were included in the SBASSR group.
Table 1 shows the clinical information between WASSR and SBASSR groups. Both groups had similar pure-tone thresholds and WRSs in both ears. However, estimated ASSR threshold of the affected ear in the WASSR group was significantly worse than that in the SBASSR group (Z = -2.394, p = 0.017). Estimated ASSR threshold of the unaffected ear was a slightly worse in the WASSR group than SBASSR group, but which was not statistically significant (Z = -1.859, p = 0.063). There were no significant differences in age, sex, side of affected ear, medical history of DM, and associated symptoms such as dizziness, tinnitus, or ear fullness between two groups. All patients had high dose steroid therapy. The number of patients who received ITD injections were similar between two groups. The duration of follow-up was also similar between two groups.