Threshold increase is shown for all experimental conditions including Silastic 1, Silastic 2, wire, sham, and controls. (A) All subjects included irrespective of distortion product otoacoustic emission (DPOAE) retention after insertion. Threshold increased more for larger implants in the first 2 weeks after insertion (*0–2 weeks, ANOVA, P < .0001). Slope of increase from 2 to 22 weeks did not differ significantly between groups. Error bars reflect standard error (SEM). (B) The DPOAE-positive subjects were analyzed. Differences in threshold were also significant at 2 weeks (ANOVA, P < .0001), but slope of threshold increase was likewise similar thereafter.