Evidence map›Paper›PMID 32242440›Full record

ArticleThe South African journal of communication disorders = Die Suid-Afrikaanse tydskrif vir Kommunikasieafwykings2020

Occupational noise and age: A longitudinal study of hearing sensitivity as a function of noise exposure and age in South African gold mine workers.

Leoni M Grobler, De Wet Swanepoel, Susan Strauss, Piet Becker, Zahan Eloff

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in The South African journal of communication disorders = Die Suid-Afrikaanse tydskrif vir Kommunikasieafwykings, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
5.7field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed, 31 citations in OpenAlex.

  1. Hearing Protection Among Workers Exposed to Occupational Noise in the South African Aluminium Industry.International journal of environmental research and public health · 2026
    Article
  2. Review
  3. Investigation of Noise Induced Hearing Loss Among Power Loom Industry Workers in Tamil Nadu, India.Indian journal of otolaryngology and head and neck surgery : official publication of the Association of Otolaryngologists of India · 2024
    Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Leoni M GroblerDepartment of Speech-Language Pathology and Audiology, Faculty of Humanities, University of Pretoria, Pretoria. leonijordaan@gmail.com.
De Wet Swanepoel
Susan Strauss
Piet Becker
Zahan Eloff
University of Pretoria · ZAAngloGold Ashanti (South Africa) · ZA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundA relationship exists between occupational noise exposure and age, which remains poorly understood.

objectivesThe aim of this study was to establish the relationship between hearing loss and age over time.

methodAudiological 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.

resultsBase 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.

conclusionAge 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.

Indexed as

AdultAge FactorsAudiometryCase-Control StudiesFemaleGoldHearing Loss, Noise-InducedHumansLongitudinal StudiesMaleMiddle AgedMinersNoise, OccupationalOccupational DiseasesRetrospective StudiesSouth AfricaGoldAge-related hearing lossMiningNoise exposureNoise-induced hearing lossOccupational noise exposure

Identifiers

PMID32242440
PMCPMC7136817
OpenAlexW3011966094

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.