Objectives: Correlation between Narrow Band Chirp Auditory Brainstem Response (NB-CE chirp ABR) as a frequency specific method for hearing threshold detection in children and Tone burst Auditory Brainstem Response (Tb-ABR) in reference to behavioral hearing threshold audiometry. Material and Methods: This study was conducted on 100 patients at audiology unit, Menoufia University hospital, in the period from Oct. 2015 to Feb. 2017. Patients enrolled within this study were classified into four groups: Group I: included 40 patients diagnosed with normal hearing, Group II: included 48 patients with mild to moderate sensorineural hearing loss (SNHL), Group III: included 56 patients with moderate to moderately severe SNHL and Group IV: included 56 patients with severe to profound SNHL. All patients' enrolled NB-CE chirp ABR, Tb-ABR as well as pure tone audiogram (PTA). Results: there was a significant correlation between NB-CE chirp ABR and PTA hearing threshold. The use of a chirp-ABR testing ensures higher sensitivity and accuracy than that of Tb-ABR for measuring frequency-specific thresholds in young children. Conclusion: NB-CE Chirp ABR is more efficient than Tb-ABR as a frequency specific tool for hearing threshold estimation in children.
Objectives: To standardize the Arabic language version of the visual vertigo analogue scale (VVAS) and to determine its reliability and validity. It is a simple and supplemental kind of assessments of visual vertigo syndrome. Methods: The Arabic VVAS (AVVAS) was developed using the cross-cultural adaptation guidelines. The scale was tested by 70 patients with visual vertigo (VV) (patient group) and 100 normal subjects (control group). Participants' responses were statistically analyzed for internal consistency between both groups. Repeatability was calculated using Spearman correlation on a subgroup of 30 control subjects and 40 VV patients after 1 week. Receiver operating characteristic curve was performed in order to select the optimal cutoff level. Results: showed a significantly good internal consistency (Cronbach's alpha = 0.83 for patients group, and 0.73 for controls). A significant difference was found in AVVAS scores between both groups (p = < 0.001). Test-retest reproducibility confirmed reliability of AVVAS. The AVVAS total scores of patients with VV were significantly different than controls. The optimal cutoff score for AVVAS was 17 (sensitivity 80%, specificity82%). Conclusion: The AVVAS can be considered a reliable, valid and helpful screening tool to quantify self-perceived handicapped that result from visual vertigo.
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