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. 2010 Sep 30;1(1):69–79. doi: 10.5491/SHAW.2010.1.1.69

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Copyright © 2010 by Safety and Health at Work (SH@W)

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 1 — Design of the study. Serum cytokines (IL-8 and TNF-α) of retired coal miners were related to presence of coal workers pneumoconiosis (CWP) and to progression of CWP. Pulmonary function was determined spirometry data (FVC and FEV₁) in 2007. Progression of CWP was evaluated by paired comparison of chest-radiographs made in 2007 and 2008. General characteristics were surveyed from structured questionnaire and interviews. IL-8: interleukin-8, TNF-α: tumor necrosis factor-alpha, IRB: institutional review board, FVC: forced vital capacity, FEV₁: forced expiratory volume in one second.