Psychometric properties for the Norwegian translations of two revised APHAB-subscales and an adapted IOI-HA (IOI-CI) in patients with cochlear implants.

Objective: The objective was to examine the psychometric properties of two questionnaires in Norwegian for the self-assessment of satisfaction following cochlear implantation.

Design: The International Outcome Inventory for Hearing Aids adapted for cochlear implants (IOI-CI) and two revised subscales from the Norwegian translation of the Abbreviated Profile of Hearing Aid Benefit (APHAB) were applied. Internal consistency was tested using Cronbach's . Testing of psychometric properties included the calculation of inter-item correlations and corrected item-total correlations. Spearman's rho was used to investigate associations. Exploratory principal component analyses with Kaiser normalisation were performed.

Study Sample: One hundred and twenty-one patients (51 males) with cochlear implants (27-88 years,  = 59).

Results: For IOI-CI, Cronbach's was 0.79. Corrected item-total correlations ranged from 0.29 to 0.69. The factor analysis revealed two components. For APHAB, Cronbach's was 0.91. Two components were revealed by the factor analysis. Corrected item-total correlations for the two subscales "communication in quiet situations" and "communication in adverse situations" were 0.47-0.81 and 0.58-0.80, respectively. The convergent validity of the questionnaires was adequate as reflected by a Spearman's coefficient of 0.67.

Conclusion: Both questionnaires show good psychometric properties.