Author Contributions: Dr Niparko had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Niparko, Tobey, Thal, Eisenberg, Wang, Quittner, Fink.
Acquisition of data: Tobey, Eisenberg, Quittner, Fink.
Analysis and interpretation of data: Niparko, Tobey, Thal, Eisenberg, Wang, Quittner, Fink.
Drafting of the manuscript: Niparko, Tobey, Wang, Quittner, Fink.
Critical revision of the manuscript for important intellectual content: Niparko, Tobey, Thal, Eisenberg, Wang, Fink.
Statistical analysis: Wang.
Obtained funding: Niparko, Tobey, Wang, Quittner, Fink.
Administrative, technical, or material support: Niparko, Tobey, Eisenberg, Quittner, Fink.
Study supervision: Niparko, Tobey, Thal, Quittner, Fink.
Financial Disclosures: Dr Niparko reported serving on advisory boards without remuneration for 2 cochlear implant manufacturers, Advanced Bionics Corporations and the Cochlear Corporation, and serving on the board of directors for a school for children with hearing loss that has received gifts from cochlear implant manufacturers. The terms of these arrangements are being managed by the Johns Hopkins University in accordance with its conflict-of-interest policies. External advisors received honoraria for their review of the study protocol and progress reports. No other disclosures were reported.
Funding/Support: The CDaCI was supported by grant R01 DC004797 from the National Institute on Deafness and Other Communication Disorders, the CityBridge Foundation, and the Sidgmore Family Foundation. Warranties on the implant devices used by children with implants in this study were discounted by 50% by the Advanced Bionics Corporation, Cochlear Corporation, and the MedEl Corporation.
Role of the Sponsor: The sponsors had no role in the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.
The CDaCI Investigators are listed in the eAppendix.