Age Dependence of Audiometric Bone Conduction Threshold in Normal Hearing Subjects

University of Zurich1,093 enrolled

Overview

Examination of the bone conduction of persons which according to the pure tone audiogram have a normal age related hearing threshold in the air conduction.

Study Type

OBSERVATIONAL

Enrollment

1,093

Conditions

Air Bone Gap

Interventions

audiogramDIAGNOSTIC_TEST

hearing test

Eligibility

Sex: ALLMin age: 20 YearsMax age: 79 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * All pure tone audiograms recorded and available in the system from the beginning of measurement as follows: * age related normal hearing threshold level with air conducted pure tone audiogram Exclusion Criteria: * age younger than 20 years * if inclusion criteria not given

Outcomes

Primary Outcomes

Bone conduction Threshold/ Air bone gap in normal hearing subject in relation to age

from the initial establishment of the database until collection of the data

Time frame: 1960 - 2014 (54 years)

Secondary Outcomes

Air bone gap changes in individuals who have received more than one Audiogram

Time frame: 1960 - 2014 (54 years)

Data from ClinicalTrials.gov

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