Statistical analysis secondary objectives
COMPASS questionnaire scores between intervention and control at 3 and 12 months after cochlear implantation will be calculated using the unpaired Statistical analysis of electrode migration data will be compared in a number of cases and percentages. To calculate any association between electrode migration of ≥ 1 mm and R/S device migration, and between electrode migration and a decrease in speech performance tests, Pearson’s correlation test or a Spearman rank correlation test will be performed. Electrode impedance values will be compared between the groups with the unpaired Participants who withdraw from the study prematurely will be considered lost and will be replaced. Reasons for withdrawal or premature termination will be documented. Potential missing data will be handled using multiple imputation. Complete case analyses will be performed as a sensitivity analysis. All analyses will be performed on an intention-to-treat basis.