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. 2021 Nov 8;43(3):1049–1066. doi: 10.1097/AUD.0000000000001159

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Copyright © 2021 The Authors. Ear & Hearing is published on behalf of the American Auditory Society, by Wolters Kluwer Health, Inc.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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Fig. 2. — Distribution of hearing loss grades in the cohort. A, Distribution of hearing loss grades for all single ears (n = 610). B, Distribution of hearing loss grades for probands with bilateral symmetric (n = 241) and asymmetric (n = 30) hearing loss (AHL) (better ear: PTA >30 and ≤55 dB HL; poorer ear PTA ≥70 dB HL; interaural threshold gap ≥15 dB HL). C, Distribution of hearing loss grades for probands with single-sided deafness (SSD) (n = 34); better ear (blue bars): PTA ≤30 dB HL; poorer ear (orange bars): PTA ≥70 dB HL; interaural threshold gap: ≥40 dB HL; according to the consensus framework for SSD and AHL (Van de Heyning et al. 2016). D, Separation of bilateral mild and moderate (<50 dB HL) hearing loss (blue bars) (n = 88) and higher-grade (≥50 dB HL) bilateral hearing loss (orange bars) (n = 372) for single ears. NH, normal hearing (−10.0 to 19.9 dB HL); MHL, mild hearing loss (20.0 to 34.9 dB HL); MOHL, moderate hearing loss (35.0 to 49.9 dB HL); MSHL, moderately severe hearing loss (50.0 to 64.9 dB HL); PHL, profound hearing loss (80.0 to 94.9 dB HL); SHL, severe hearing loss (65.0 to 79.9 dB HL); CHL, complete or total hearing loss (≥95.0 dB HL). Classification follows the recommendations of the Global Burden of Disease (GBD) Expert Group on Hearing Loss (Global Burden of Disease Hearing Loss Expert Group et al. 2013; Olusanya et al. 2019a). Percentage values for different hearing loss grades are shown below bars.