Ismaail Naema Mohammed, Shalaby Amany Ahmed, Ibraheem Ola Abdallah, Elsayed Asmaa Abd El-Aziz
Audio-Vestibular Medicine Unit, Otorhinolaryngology Department, Faculty of Medicine (Girls), AL-Azhar University, Cairo, Egypt.
Audio-Vestibular Medicine Unit, Otorhinolaryngology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt.
J Am Acad Audiol. 2019 Apr 17. doi: 10.3766/jaaa.18004.
Sensorineural hearing loss (SNHL) has serious implications on temporal resolution when the nonfunctioning areas known as cochlear dead regions (DRs) exist. Previous studies have not clarified this effect in the pediatric population.
This study aimed to assess the prevalence of DRs in school-age Egyptian children with SNHL and to explore the effect of these DRs on temporal resolution ability.
This was a cross-sectional case-control study.
The Gaps-In-Noise (GIN) test was administered to 70 normal-hearing and 30 hearing-impaired (HI) children (ages 6-16 years), matched in age and gender. In HI children, cochlear DRs were detected using the Threshold-Equalizing Noise test.
Comparison of quantitative data involved parametric (Student's t and one-way ANOVA) and nonparametric (Mann-Whitney U and Kruskal-Wallis H) tests, depending on normality distribution. Comparison of categorical variables required Chi-square or Fisher's exact tests.
The prevalence of DRs was 30% in school-age children, with a hearing threshold range of >40-70 dB HL, mainly affecting high frequencies. HI children had significantly impaired GIN test results, especially when DRs were present.
DRs markedly affect temporal resolution. Studying this relationship in children can improve strategies for amplification and temporal processing remediation, enhancing speech perception in these young participants.
当存在被称为耳蜗死区（DRs）的无功能区域时，感音神经性听力损失（SNHL）对时间分辨率有严重影响。以往研究尚未阐明这种影响在儿科人群中的情况。
本研究旨在评估患有SNHL的学龄期埃及儿童中DRs的患病率，并探讨这些DRs对时间分辨率能力的影响。
这是一项横断面病例对照研究。
对70名听力正常和30名听力受损（HI）儿童（年龄6 - 16岁）进行了噪声间隙（GIN）测试，这些儿童在年龄和性别上相匹配。在HI儿童中，使用阈值均衡噪声测试检测耳蜗DRs。
根据正态分布情况，定量数据的比较涉及参数检验（学生t检验和单因素方差分析）和非参数检验（曼 - 惠特尼U检验和克鲁斯卡尔 - 沃利斯H检验）。分类变量的比较需要卡方检验或费舍尔精确检验。
学龄期儿童中DRs的患病率为30%，听力阈值范围>40 - 70 dB HL，主要影响高频。HI儿童的GIN测试结果明显受损，尤其是当存在DRs时。
DRs显著影响时间分辨率。在儿童中研究这种关系可以改进放大和时间处理补救策略，提高这些年轻参与者的言语感知能力。
