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Organization and administration of the NIDCD/VA Hearing Aid Clinical Trial
William G Henderson1, Vernon D Larson, David Williams
1Hines VA Cooperative Studies Program Coordinating Center, Hines, Illinois 60141, USA.
Ear and Hearing
|August 27, 2002
Abstract:
This article describes the organization and administration of the NIDCD/VA Hearing Aid Clinical Trial. The trial involved a total of 360 patients with bilateral, sensorineural hearing loss from eight VA Medical Centers to study three different hearing aid circuits in a three-period, three-treatment crossover design. Strong central coordination of such a complex multi-center clinical trial is essential to its success. The trial took more than 5 years to design, implement, and complete. This timeline is also described.