A statistically significant improvement of inner ear hearing levels postoperatively (p = 0.041) and a major reduction in vertigo attacks in all groups (p < 0.001) with complete absence of attacks in 26/30 patients was noted. Results remained constant up to 9 years postoperatively. Although tinnitus persisted, the intensity was lower overall (p = 0.013).
A statistically significant reduction of 48 DHI points, from a median preoperative DHI = 52 to DHI = 4 postoperatively, was noted (p < 0. 001). In all, 40/42 patients reported a reduction of dizziness handicap, while in 33/42 the difference was > 12 points. A statistically significant reduction of DHI scores was noted (A = 60, B = 34, C = 33) in all subgroups. It was also noted that the higher the preoperative DHI score, the greater the subjective success of the surgery.
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