OP04 Methodological Challenges Of Assessing An Evolving Technology: The Cochlear Implant For Deaf People

Abstract

Introduction

When Cochlear implants (CI) were first introduced, only postlingually, profoundly hearing impaired individuals were implanted unilaterally. As experience grew, eligibility was followed by prelingual deaf children, and a second contralateral CI was being considered. Due to surgical and technological improvements, eligibility criteria for CI are now shifting, encompassing patients with more residual hearing. We aimed to explore, ex ante, whether such shift is warranted.

Methods

A dynamic, population-based Markov modeling study was conducted. Model parameters were based on available evidence, expert opinion, and calibration. The model mimics Dutch demographic development in three age categories over a period of 20 years. Impact of changing eligibility was explored in terms of number of CI recipients, costs, quality of life and cost-effectiveness from a societal perspective.

Results

If those with severe hearing loss would qualify and opt for CI similar to those with profound hearing loss, this would lead to a fourfold increase of CI recipients (from 8,815 to 35,630) over a 20 year period, resulting in an increase in costs (EUR 550 million) and QALYs (54,000), with an Incremental Cost Utility Ratio of EUR 10,771/QALY (2.5–97.5 percentiles: 1,252–23,171).

Conclusions

Results suggest that expected health gains could be such, that the investment may be considered cost-effective against the backdrop of currently prevailing criteria. However, for this, a substantial increase in operating capacity, follow-up care and rehabilitation are required. Further inquiries are needed to investigate whether such increased capacity can be achieved, to ensure equitable access to those services.