SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS最新文献

{"title":"A descriptive analysis of assessment measures on the effectiveness of a comprehensive stuttering intervention approach: A single case study.","authors":"Tasneem F Karani,&nbsp;Anniah Mupawose","doi":"10.4102/sajcd.v67i1.648","DOIUrl":"https://doi.org/10.4102/sajcd.v67i1.648","url":null,"abstract":"<p><strong>Background: </strong>For effective client outcomes, stuttering assessment and intervention approaches need to be aligned. This encompasses using assessment and intervention approaches that address the three multidimensional constructs of stuttering, namely core behaviours, secondary behaviours and negative feelings and attitudes.</p><p><strong>Objective: </strong>The study aimed to explore whether multiple assessment measures could be used to describe the effectiveness of a comprehensive stuttering intervention approach, undergirded by the International Classification of Functioning, Disability and Health (ICF) framework.</p><p><strong>Method: </strong>A single-subject case design was employed with one male adult who stutters. Data was collected by administering the Stuttering Severity Instrument-Fourth Edition (SSI-4) and Overall Assessment of the Speaker's Experience of Stuttering-Adults (OASES-A) at three testing periods (pre-intervention, immediately post-intervention and 7 months post-intervention), and a semi-structured interview schedule immediately post-intervention. Descriptive statistics was used to analyse the SSI-4 and OASES-A, and thematic analysis was conducted to evaluate the participant's interview schedule responses.</p><p><strong>Results: </strong>The participant's total scores, impact scores and severity ratings of both the SSI-4 and OASES decreased across the three testing periods. The main theme of effectiveness of the comprehensive stuttering intervention to reduce aspects of disability emerged from the participant's responses.</p><p><strong>Conclusion: </strong>Evaluation of the results from the assessment measures revealed that the comprehensive stuttering intervention approach was effective in reducing the participant's core behaviours, secondary behaviours and negative feelings and attitudes. Assessment and management of fluency disorders should promote a client-specific multidimensional approach that extends beyond the core behaviours and secondary behaviours, by addressing the underlying social and emotional facets of fluency disorders.</p>","PeriodicalId":44003,"journal":{"name":"SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS","volume":"67 1","pages":"e1-e9"},"PeriodicalIF":1.1,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4102/sajcd.v67i1.648","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37903392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The hearing function of sound engineers: A hearing conservation perspective.","authors":"Liepollo Ntlhakana,&nbsp;Angie A Heliopoulos","doi":"10.4102/sajcd.v67i1.638","DOIUrl":"https://doi.org/10.4102/sajcd.v67i1.638","url":null,"abstract":"<p><strong>Background: </strong>Occupational activities performed by sound engineers are associated with hearing loss. However, there is a dearth of research on the hearing functions and the related hearing loss for sound engineers.</p><p><strong>Objectives: </strong>To determine the hearing function and early effects of noise on the hearing ability of sound engineers, and to establish whether there are hearing conservation programmes (HCPs) available for sound engineer participants in Johannesburg.</p><p><strong>Methods: </strong>A quantitative cross-sectional design was used. Eight sound engineers from the Academy of Sound Engineering (ASE) participated in the study. The following data were collected from the participants: case history data, ear-related symptoms and hearing conservation data. Hearing screening followed by full diagnostic audiological assessments was conducted for each participant. Descriptive statistics and one-sample t-test were used to analyse the data (confidence interval [CI] = 95%).</p><p><strong>Results: </strong>Participants reported tinnitus and aural fullness as common complaints. Only one participant had a unilateral impacted cerumen. All the participants presented with hearing within normal limits bilaterally, with a percentage loss of hearing (PLH) of 1.1% for all the participants. However, five participants presented with a notched configuration that was ≥ 10 decibel (dB), in the high frequency region at 3000 Hz and 6000 Hz bilaterally. One-sample t-test (p = 0.001) inferred that at a mean age of 27.6 years (standard deviation [SD] = 3.85), a notch at 3000 Hz and 6000 Hz was associated with an early sign of a hearing loss for the study participants. An HCP was not in place at the study site.</p><p><strong>Conclusion: </strong>The study indicated a younger age as an associated early sign of noise-induced hearing loss (NIHL) for the study participants, and that audiologists' clinical practice needs to explore HCP strategies specific for the sound engineers in order to prevent hearing loss.</p>","PeriodicalId":44003,"journal":{"name":"SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS","volume":"67 1","pages":"e1-e7"},"PeriodicalIF":1.1,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4102/sajcd.v67i1.638","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37903948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An audiological profile of a cohort of school-aged children with HIV and AIDS attending an antiretroviral clinic in South Africa.","authors":"Vuyelwa Z Peter, Jessica Paken, Lavanithum Joseph","doi":"10.4102/sajcd.v67i1.651","DOIUrl":"10.4102/sajcd.v67i1.651","url":null,"abstract":"<p><strong>Background: </strong>Recent estimates reveal that there are approximately 280 000 children between the ages of birth and 14 years who are living with the human immunodeficiency virus (HIV) and acquired immunodeficiency syndrome (AIDS) in South Africa. These children are living with a compromised immune system, are vulnerable to opportunistic infections and subsequent hearing loss. However, there is limited research on the nature and extent of this sensory impairment amongst school-aged children.</p><p><strong>Objective: </strong>This study aimed to determine an audiological profile of a cohort of school-aged children attending an antiretroviral (ARV) clinic, describing the occurrence of hearing loss and nature in terms of degree, type, configuration and symmetry.</p><p><strong>Methods: </strong>A non-experimental descriptive exploratory study was conducted, where 30 children aged between 6 and 12 years underwent diagnostic audiological assessments. Audiological procedures included case history, medical record review, otoscopic examination, immittance audiometry, pure-tone audiometry, speech audiometry, distortion product otoacoustic emissions (DPOAEs) and neurological auditory brainstem response (ABR) testing. The results were analysed descriptively using SPSS version 22 software.</p><p><strong>Results: </strong>The results indicated abnormal otoscopic findings in half the participants, and consequently type C tympanograms were the most common. Of the 28 participants who could be assessed with pure-tone audiometry, 15 (54%) showed a hearing loss. A bilateral rising mild, conductive hearing loss was predominant. Thirteen (43%) of the participants could not be tested using DPOAE because of outer and middle-ear pathology. Neurological ABR testing revealed an abnormality in 18 (60%) of the participants suggesting the sensitivity of the ABR to detect subtle neurological changes.</p><p><strong>Conclusion: </strong>Half the children in this study showed hearing loss, which has serious implications for the holistic management of the children within the health and educational contexts. Therefore, there is a need for audiological monitoring of children with HIV and AIDS.</p>","PeriodicalId":44003,"journal":{"name":"SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS","volume":"67 1","pages":"e1-e9"},"PeriodicalIF":1.0,"publicationDate":"2020-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7203215/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37903947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feedback-based noise management matrix in action.","authors":"Nomfundo F Moroe, Katijah Khoza-Shangase, Milka Madahana, Otis Nyandoro","doi":"10.4102/sajcd.v67i2.678","DOIUrl":"10.4102/sajcd.v67i2.678","url":null,"abstract":"<p><strong>Background: </strong>This article presents the details and findings of a practical implementation of a preliminary model for use in hearing conservation programmes (HCPs) in the mining sector in South Africa.</p><p><strong>Objectives: </strong>The implementation is based on a previously published model, called feedback-based noise monitoring model (FBNMM), and represents its implementation as a tool of predicting occupational noise-induced hearing loss (ONIHL), as well as monitoring and managing HCPs in the mining sector within the South African context.</p><p><strong>Method: </strong>The article, utilising real miners' data, demonstrates this basic static feedback model with its practical applications such as estimating, monitoring and providing quantitative information to aid miners, mining administrators and policymakers in decision-making around HCPs, as recommended in the previous 2019 publication by Moroe et al. This study was conducted in a South African platinum mine. Evidence on the model's sensitivity and practicability in early identification, intervention and management of ONIHL in the workplace is presented.</p><p><strong>Results: </strong>Findings show how the use of the model within an HCP viewed as a complex intervention can allow for early prediction of ONIHL, consequently affording more accurate early intervention as part of preventive audiology within the health and safety goals of mines.</p><p><strong>Conclusion: </strong>The feedback-based model should be a useful tool for successful implementation and monitoring of HCPs within South African mines.</p>","PeriodicalId":44003,"journal":{"name":"SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS","volume":"67 2","pages":"e1-e9"},"PeriodicalIF":1.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7203224/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37798001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Engineering noise control for mines: Lessons from the world.","authors":"Milka C Madahana, Otis T Nyandoro, Nomfundo F Moroe","doi":"10.4102/sajcd.v67i2.684","DOIUrl":"10.4102/sajcd.v67i2.684","url":null,"abstract":"<p><strong>Objective: </strong>The main objective of this article was to present some of the engineering noise control methods that are currently being used across the world in the mining industry, while at the same time interrogating noise control measures that could be applied to effectively reduce noise emissions from the equipment utilised within South African mines.</p><p><strong>Background: </strong>A brief summary of the hearing conservation programmes used in South Africa is presented. Summarised research on the use of engineering noise control in South Africa is also presented, with an overview of the various engineering noise control methods applied across the world in dealing with occupational noise.</p><p><strong>Method: </strong>For illustrative purposes, case studies were used to show how engineering noise controls could be used to reduce the noise levels and risks within this context.</p><p><strong>Results: </strong>Some of the case studies used have cited a reduction in the noise intensity emitted by machinery from a range of 93 dBA - 104 dBA to a range of 90 dBA - 94 dBA, demonstrating quite a significant reduction in the noise emission of the equipment. This article further provides recommendations on how South African mines could contextualise these methods.</p><p><strong>Conclusion: </strong>One of the key recommendations is encouraging the South African mining industry towards the documenting and publishing of those engineering noise control methodologies that have proven to be effective for shared best practice. A need was identified for extensive research to be conducted and documented evidence to be made available to assist the South African mining industry with locating and assessing current engineering controls available in South Africa. Machines and processes that require noise control should be identified and, lastly, the current barriers to the use of engineering noise control methodologies should be identified, with the main goals of finding ways to overcome the noise challenges in the mines.</p>","PeriodicalId":44003,"journal":{"name":"SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS","volume":"67 2","pages":"e1-e5"},"PeriodicalIF":1.0,"publicationDate":"2020-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7136811/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37798000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Middle ear pathologies in adults within the mining industry: A systematic review.","authors":"Ben Sebothoma","doi":"10.4102/sajcd.v67i2.679","DOIUrl":"https://doi.org/10.4102/sajcd.v67i2.679","url":null,"abstract":"<p><strong>Background: </strong>Literature suggests that risk factors for middle ear pathologies, such as traumatic injuries and human immunodeficiency virus (HIV), exist in mines. However, studies on hearing health in mines seem to focus primarily on occupational noise-induced hearing loss and ignore middle ear pathologies. As a result, there is little documented evidence on the trends of middle ear pathologies in mine workers.</p><p><strong>Objectives: </strong>The aim of this study was to explore and document published evidence reflecting trends in middle ear pathologies in mine workers.</p><p><strong>Method: </strong>A systematic literature review of studies that reported middle ear pathologies in mine workers was conducted. Medline, CINAHL, PubMed, PsychInfo and Google Scholar databases were searched for studies in English published between January 1994 and December 2018 and reporting on trends in middle ear pathologies in mine workers.</p><p><strong>Results: </strong>Two research studies met the selection criteria and were included for analysis. One research study used tympanometry with 226 Hz probe tone, while another study used interviews to determine the presence of middle ear pathologies. While these studies indicate that middle ear pathologies exist in individuals working in mines, the evidence is limited.</p><p><strong>Conclusion: </strong>While current data indicate that individuals working in mines may present with middle ear pathologies of varying severities, the evidence is too small to provide a clear trend of middle ear pathologies in individuals working in mines. Therefore, the current limited data suggest a need for further studies to examine middle ear pathologies in individuals working in mines.</p>","PeriodicalId":44003,"journal":{"name":"SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS","volume":"67 2","pages":"e1-e5"},"PeriodicalIF":1.1,"publicationDate":"2020-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4102/sajcd.v67i2.679","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37797999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occupational noise induced hearing loss in the mining sector in South Africa: Perspectives from occupational health practitioners on how mineworkers are trained.","authors":"Nomfundo F Moroe","doi":"10.4102/sajcd.v67i2.676","DOIUrl":"https://doi.org/10.4102/sajcd.v67i2.676","url":null,"abstract":"<p><p>The aim of this study was to explore the perspectives of occupational health practitioners (OHPs) regarding education and training of mineworkers on occupational noise induced hearing loss (ONIHL) and its impact on mineworkers' health. Qualitative, in-depth telephonic and face-to-face interviews were conducted with 16 OHPs. Purposive and snowball sampling was utilized to recruit participants. Data were analysed using inductive thematic analysis. Three themes emerged from the data: seeing is believing, not my department, barriers and facilitators to raising awareness (with two subthemes -blame it on the language and level of education, and compensation pay-outs). Superficially, OHPs believe that mineworkers are aware of the impact of noise health, however, the OHPs are not knowledgeable on how the mineworkers are educated on ONIHL and its latent consequences. Furthermore, language, low levels of education and literacy, as well as financial constraints are factors found to affect education and training of the mineworkers about the risks of ONIHL. If the mining industry is committed in eliminating ONIHL, they should prioritize health literacy, and mines need to have an effective awareness raising plan in place at every mine. This plan should consider diversity of the workforce, including linguistic as well as educational level diversity.</p>","PeriodicalId":44003,"journal":{"name":"SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS","volume":"67 2","pages":"e1-e6"},"PeriodicalIF":1.1,"publicationDate":"2020-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4102/sajcd.v67i2.676","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37797998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimating miners at risk for occupational noise-induced hearing loss: A review of data from a South African platinum mine.","authors":"Liepollo Ntlhakana,&nbsp;Gill Nelson,&nbsp;Katijah Khoza-Shangase","doi":"10.4102/sajcd.v67i2.677","DOIUrl":"https://doi.org/10.4102/sajcd.v67i2.677","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Background: &lt;/strong&gt;Occupational noise-induced hearing loss (ONIHL) is a complex, but preventable, health problem for South African miners. Meticulously collected data should be made use of to design interventions to address this health issue.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Objectives: &lt;/strong&gt;A single mine's electronic data were reviewed in a secondary data review to determine, from the records, factors that hearing conservation practitioners deemed useful for identifying 'at risk' miners and to establish factors that would pave the way for the integration of the 2014 hearing conservation programme (HCP) milestones into the mine's current proactive data management system (PDMS). The objectives of this article were to establish how miners with published risk factors associated with ONIHL were managed by the mine's hearing conservation practitioners as part of the HCP; to determine if the mine's hearing conservation practitioners could estimate miners' risk of ONIHL using baseline percentage loss of hearing (PLH) as a hearing conservation measure; and to estimate the contribution of noise exposure to ONIHL risk.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Method: &lt;/strong&gt;In a secondary data review design, records in a platinum mine's two electronic data sets were reviewed: the first contained diagnostic audiometry records (N = 1938) and the second comprised a subset of miners diagnosed with ONIHL (n = 73). Data were available for the period 2014-2017 and included demographic, occupational, audiometry and ONIHL diagnosis data. Miners' risk factors associated with ONIHL were identified using the functional risk management structure. A logistic regression model was used for the baseline PLH margins of 0% - 40% (in 5% increments) to estimate the adjusted predictions for miners at risk of developing ONIHL. The contribution of noise exposure as a risk for ONIHL was estimated using a two-way sample proportion test.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;The mean age of the miners (all male candidates) was 47 ± 8.5 years; more than 80% had worked for longer than 10 years. Valid baseline audiometry records were available for only 34% (n = 669) of the miners. Miners with a 0% baseline PLH had a 20% predicted risk of ONIHL, and a 45% predicted risk if they had a 40% baseline PLH - these employees were referred. The noise exposure risk rankings revealed that 64.9% (n = 1250) of the miners were exposed to 91 dBA - 105 dBA noise exposure levels and that 59 (80.8%) diagnosed with ONIHL were exposed to noise levels of up to 104 dBA.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusion: &lt;/strong&gt;These findings indicate significant gaps in the mine's PDMS, requiring attention. Nonetheless, the mine's current data capturing may be used to identify miners at risk of developing ONIHL. The PLH referral cut-off point (≥2.5%) used by the mine's hearing conservation practitioners, when used in conjunction with baseline PLH shifts, was the major factor in early identification of ONIHL in miners exposed to ≥85 dBA noise. An inclusive integr","PeriodicalId":44003,"journal":{"name":"SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS","volume":"67 2","pages":"e1-e8"},"PeriodicalIF":1.1,"publicationDate":"2020-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4102/sajcd.v67i2.677","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37797997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A critical analysis of the current South African occupational health law and hearing loss.","authors":"Warren G Manning, Mershen Pillay","doi":"10.4102/sajcd.v67i2.694","DOIUrl":"10.4102/sajcd.v67i2.694","url":null,"abstract":"<p><strong>Background: </strong>Occupational health laws must recognise the constitutional requirement of substantive equality, and its role in 'the progressive realisation' of the rights provided by Section 27.</p><p><strong>Objectives: </strong>Our main aim is to review current South African occupational health law (vis-à-vis workers' constitutional rights) in relation to hearing loss. We focus on gaps in the law regarding occupational hearing loss in South Africa.</p><p><strong>Method: </strong>Our review of legal texts relies on experience as a methodological device augmented by the use of a critical science. Guided by literature or evidence synthesis methodologies, South African primary and secondary laws were reviewed along with unpublished (non-peer-reviewed) grey literature. An established six-step framework guided our thematic analysis. A semantic approach aided the critical interpretation of data using the Bill of Rights as a core analytical framework.</p><p><strong>Results: </strong>Four themes are discussed: (1) separate and unequal regulatory frameworks; (2) monologic foregrounding of noise; (3) minimisation of vestibular disorders; and (4) dilution of ototoxic agents. The highly divided legal framework of occupational health and safety in South Africa perpetuates a monologic 'excessive noise-hearing loss' paradigm that has implications for the rights of all workers to equal protections and benefits. There is a need to harmonise occupational health and safety law, and expand the scope of hearing-protection legislation to include the full range of established ototoxic hazards.</p><p><strong>Conclusion: </strong>Occupational audiology is dominated by efforts to address noise-induced hearing loss. A 'noise' despite the reality of workers' exposures to a range of ototoxic stressors that act synergistically on the ear, resulting in audio-vestibular disorders.</p>","PeriodicalId":44003,"journal":{"name":"SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS","volume":"67 2","pages":"e1-e11"},"PeriodicalIF":1.1,"publicationDate":"2020-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7136813/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37797996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occupational noise and age: A longitudinal study of hearing sensitivity as a function of noise exposure and age in South African gold mine workers.","authors":"Leoni M Grobler, De Wet Swanepoel, Susan Strauss, Piet Becker, Zahan Eloff","doi":"10.4102/sajcd.v67i2.687","DOIUrl":"10.4102/sajcd.v67i2.687","url":null,"abstract":"<p><strong>Background: </strong>A relationship exists between occupational noise exposure and age, which remains poorly understood.</p><p><strong>Objectives: </strong>The aim of this study was to establish the relationship between hearing loss and age over time.</p><p><strong>Method: </strong>Audiological data from 2583 mine workers in South Africa were utilised. Data were received from a non-noise exposed group (NNEG) (n = 951) and a noise exposed group (NEG) (≥85 dBA) (n = 1632). Data comprised a low-frequency average (LFA512) (average of audiological thresholds for 0.5 kHz, 1 kHz and 2 kHz) and high-frequency average (HFA346) (average of audiological thresholds for 3 kHz, 4 kHz and 6 kHz). Data were compared by using mixed-effects regression analysis.</p><p><strong>Results: </strong>Base threshold values were higher for the NEG than for the NNEG across frequencies. All year-to-year increases in mean hearing thresholds were statistically significant (p 0.01). When correcting for age, increases in mean hearing thresholds were higher for the NEG than for the NNEG for HFA346 (3.5 dB vs. 2.9 dB decline over a 4-year period) but similar for LFA512 (0.6 dB vs. 0.7 dB decline). Uncorrected for age, increases in mean hearing thresholds were higher than when age was corrected for.</p><p><strong>Conclusion: </strong>Age and occupational noise exposure influence hearing thresholds over time. The continued increase in hearing thresholds of the NEG above that of the NNEG can be related to ineffective noise management programmes and/or the fact that early noise exposure leads to a higher burden of hearing loss over time - even after noise exposure had stopped.</p>","PeriodicalId":44003,"journal":{"name":"SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS","volume":"67 2","pages":"e1-e7"},"PeriodicalIF":1.0,"publicationDate":"2020-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7136817/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37797995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}