3.2 Analysis of outcome differences in the UHL subgroup (n = 48)
The hearing threshold at 1 Hz for the better ear was lower for successful users than for intermittent users (p = 0.046; 13 ± 6 dB HL for successful users; 19 ± 7 dB HL for intermittent users; 17 ± 8 dB HL for failed users)(Figures 1B and 2B). Compared with the other unspecified etiologies, the retrocochlear etiology of hearing loss was found more often for successful users than for the other two outcomes (p = 0.021)(Figure 3D).
For three outcomes (successful user versus intermittent user versus failed users), the discriminant function was D = -3.637 + (2.210 * etiology (retrocochlear versus other unspecified causes)(discriminating power = 45.8%).