Radiographic outcomes among South African coal miners

Naidoo, Rajen N.; Robins, Thomas G.; Solomon, Albert; White, Neil W.; Franzblau, Alfred

doi:10.1007/s00420-004-0532-3

Cited by 25 publications

(24 citation statements)

References 21 publications

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“…Standardised methodologies were used for acquisition and display of both the digital and traditional radiographs. The inter-reader agreement observed was similar to that in other studies [16][17][18].…”

Section: Discussionsupporting

confidence: 78%

Comparison of storage phosphor computed radiography with conventional film-screen radiography in the recognition of pneumoconiosis

Laney¹,

Petsonk²,

Wolfe³

et al. 2009

Eur Respir J

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Traditional film-screen radiography (FSR) has been useful in the recognition and evaluation of interstitial lung diseases, but is becoming increasingly obsolete. To evaluate the applicability of storage phosphor digital computed radiography (CR) images in the recognition of small lung opacities, we compared image quality and the profusion of small opacities between FSR and CR radiographs.We screened 1,388 working coal miners during the course of the study with FSR and CR images obtained on the same day from all participants. Each traditional chest film was independently interpreted by two of eight experienced readers using the International Labour Office (ILO) classification of radiographs of pneumoconiosis, as were CR images displayed on medical-grade computer monitors.The prevalence of small opacities (ILO category 1/0 or greater) did not differ between the two imaging modalities (5.2% for FSR and 4.8% for soft copy CR; p.0.50). Inter-reader agreement was also similar between FSR and CR. Significant differences between image modalities were observed in the shape of small opacities, and in the proportion of miners demonstrating high opacity profusion (category 2/1 and above).Our results indicate that, with appropriate attention to image acquisition and soft copy display, CR digital radiography can be equivalent to FSR in the identification of small interstitial lung opacities.

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Section: Discussionsupporting

confidence: 78%

Comparison of storage phosphor computed radiography with conventional film-screen radiography in the recognition of pneumoconiosis

Laney¹,

Petsonk²,

Wolfe³

et al. 2009

Eur Respir J

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“…11 Studies that investigated the effects of occupational exposure to coal, a substance similar to charcoal has established the dose-response relationships with lung diseases such as pneumoconiosis and COPD. [3][4][5][15][16][17][18][19][20][21] We hypothesize that prolonged exposure to charcoal dust is associated with increased risk for manifestation of poor respiratory health outcomes among the charcoal workers. This study investigated whether exposure to charcoal dust was related to respiratory symptoms and lung function in a dose-dependent manner.…”

Section: -5mentioning

confidence: 99%

“…To limit bias and maximize validity, reliability and comparability, we used a previously field-tested instrument based on the US National Institute of Occupational Safety and Health's Occupational History Questionnaire used in the US Coal Workers' X-ray Surveillance Program. 4,15 Questionnaires were administered by trained interviewers (advanced undergraduate environmental sciences students). Questionnaires were translated into three languages spoken by the participants (Oshiwambo, Rukavango, and Afrikaans) and back-translated to ensure validity.…”

Section: Collection Of Interview Datamentioning

confidence: 99%

Respiratory health effects of occupational exposure to charcoal dust in Namibia

Hamatui

Naidoo

Kgabi

2016

International Journal of Occupational and Environmental Health

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Background: Charcoal processing activities can increase the risk of adverse respiratory outcomes. Objective: To determine dose-response relationships between occupational exposure to charcoal dust, respiratory symptoms and lung function among charcoal-processing workers in Namibia. Methods: A cross-sectional study was conducted with 307 workers from charcoal factories in Namibia. All respondents completed interviewer-administered questionnaires. Spirometry was performed, ambient and respirable dust levels were assessed in different work sections. Multiple logistic regression analysis estimated the overall effect of charcoal dust exposure on respiratory outcomes, while linear regression estimated the exposurerelated effect on lung function. Workers were stratified according to cumulative dust exposure category. Results: Exposure to respirable charcoal dust levels was above occupational exposure limits in most sectors, with packing and weighing having the highest dust exposure levels (median 27.7 mg/m 3 , range: 0.2-33.0 for the 8-h time-weighted average). The high cumulative dust exposure category was significantly associated with usual cough (OR: 2.1; 95% CI: 1.1-4.0), usual phlegm (OR: 2.1; 95% CI: 1.1-4.1), episodes of phlegm and cough (OR: 2.8; 95% CI: 1.1-6.1), and shortness of breath. A non-statistically significant lower adjusted mean-predicted % FEV1 was observed (98.1% for male and 95.5% for female) among workers with greater exposure. Conclusions: Charcoal dust levels exceeded the US OSHA recommended limit of 3.5 mg/m 3 for carbon-blackcontaining material and study participants presented with exposure-related adverse respiratory outcomes in a dose-response manner. Our findings suggest that the Namibian Ministry of Labour introduce stronger enforcement strategies of existing national health and safety regulations within the industry.

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“…La asociación estadísticamente significativa (p=0,34) reportada en el estudio entre los años de trabajo minero (tiempo de exposición) y la aparición de la alteración en la espirometría, reafirma la relación lineal estadísticamente significativa que se ha reportado también en los estudios de Naidoo, et al (43), y de López, et al (44).…”

Section: Discussionunclassified

Spirometry in a population of coal miners in Paipa, Colombia

et al. 2017

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Introducción: Las enfermedades respiratorias derivadas de la exposición a material en partículas, como sucede en la minería del carbón, continúa siendo un reto investigativo en el país y un problema de salud pública. La espirometría es una prueba de la función respiratoria, fundamental para el diagnóstico y la vigilancia de este tipo de enfermedades pulmonares crónicas.Objetivo. Determinar los valores de la espirometría en la población minera de carbón del municipio de Paipa, y su asociación con la edad y el tiempo de exposición laboral.Materiales y métodos. Se hizo un estudio descriptivo de corte transversal. Se diligenció el cuestionario de enfermedad respiratoria ocupacional de la American Thoracic Society (ATS), se registraron las mediciones de la espirometría y se interpretaron siguiendo las recomendaciones internacionales.Resultados. La muestra incluyó 226 trabajadores de minas de carbón de Paipa; en 12,3 % (n=28) de ellos se registraron alteraciones leves, de tipo obstructivo o restrictivo. En 35 % (n=80) hubo disminución de la relación entre la capacidad vital forzada y el volumen espirado en el primer segundo (CVF/VEF1). Se encontró una asociación estadísticamente significativa entre el rango de edad (p=0,002) y los años de trabajo minero (p=0,34), además de trastornos restrictivos y obstructivos. Asimismo, hubo una asociación estadísticamente significativa entre el rango de edad (p<0,01) y los años de trabajo minero (p<0,01), de diferente seriedad en el patrón de las mediciones de la espirometría.Conclusiones. La espirometría es una prueba útil para detectar la presencia de trastornos respiratorios en la población minera del carbón. La enfermedad respiratoria en estos mineros estuvo significativamente asociada con el tiempo de exposición.

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Radiographic outcomes among South African coal miners

Cited by 25 publications

References 21 publications

Comparison of storage phosphor computed radiography with conventional film-screen radiography in the recognition of pneumoconiosis

Comparison of storage phosphor computed radiography with conventional film-screen radiography in the recognition of pneumoconiosis

Respiratory health effects of occupational exposure to charcoal dust in Namibia

Spirometry in a population of coal miners in Paipa, Colombia

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