Departamento de Fonoaudiologia, Faculdade de Medicina, Universidade Federal do Rio de Janeiro - UFRJ - Rio de Janeiro (RJ), Brasil.
Programa de Pós-graduação em Ciências da Reabilitação, Departamento de Fisioterapia, Fonoaudiologia e Terapia Ocupacional, Faculdade de Medicina, Universidade de São Paulo - USP - São Paulo (SP), Brasil.
Codas. 2022 Jan 7;34(3):e20200207. doi: 10.1590/2317-1782/20212020207. eCollection 2022.
To verify the test-retest reliability of the Masking Level Difference in normal hearing female university students.
Prospective descriptive study with 78 young female adults without hearing complaints, submitted to the compact disc version of the Masking Level Difference by Auditec of Saint Louis. The threshold was determined by the difference between signal-to-noise ratios at hearing thresholds found in the antiphasic and homophasic conditions. The test was applied by the same examiner in two moments (test and retest) with an interval of seven to 14 days between them. Inferential statistical analysis included comparison of test and retest situations using Student's t test for paired samples, calculation of the intraclass correlation coefficient and calculation of 95% confidence intervals for signal-to-noise ratios at hearing thresholds found in the antiphasic and homophasic conditions and for masking level difference.
The average signal-to-noise ratio at hearing threshold in the homophasic condition was -12.59 dB and -12.46 dB in the Test and Retest situations, respectively, and -21.54 dB and -21.08 dB in the antiphasic condition. The average value in the final Masking Level Difference result was 8.95 dB in the Test and 8.74 dB in the Retest. Intraclass correlation coefficient values obtained were 0.436, 0.625 and 0.577 for homophasic, antiphasic and Masking Level Difference conditions, respectively.
The Masking Level Difference showed moderate test-retest reliability in normal hearing adults female university students.
验证正常听力女性大学生的掩蔽级差的重测信度。
前瞻性描述性研究，共纳入 78 名无听力投诉的年轻成年女性，使用 Auditec 圣路易斯的光盘版进行掩蔽级差测试。阈值通过在反相和同相条件下发现的听力阈值的信噪比差值确定。测试由同一位检查者在两个时间点（测试和复测）进行，两次测试之间的间隔为 7 至 14 天。推断性统计分析包括使用配对样本 Student's t 检验比较测试和复测情况，计算同相和反相条件下听力阈值的信噪比以及掩蔽级差的组内相关系数，并计算 95%置信区间。
同相条件下听力阈值的平均信噪比分别为测试和复测时的-12.59dB 和-12.46dB，反相条件下为-21.54dB 和-21.08dB。最终掩蔽级差结果的平均数值分别为测试时的 8.95dB 和复测时的 8.74dB。同相、反相和掩蔽级差条件下获得的组内相关系数值分别为 0.436、0.625 和 0.577。
在正常听力的成年女性大学生中，掩蔽级差显示出中等程度的重测信度。
