Objective: The primary goal of this study is to determine the frequency of onset of this disorder in our infant population. Its clinical importance is due, among other reasons, to the fact that idiopathic cases constitute false negatives in the auditory screening programmes based on the performance of otoacoustic emissions to all newborn children and brainstem auditory evoked response only to those presenting these risk factors, for which reason another goal is to establish the prevalence of these pure cases and the diagnostic delay they cause.
Patients And Method: Prospective study of all newborn children at the Virgen de la Arrixaca Mother and Child Hospital (Murcia, Spain) in the period between June 1, 2000 and June 30, 2006.