Disclosure Statement: The authors report no conflicts of interests.
Work-related spirometric restriction in flavoring manufacturing workers
Article first published online: 22 NOV 2013
Published 2013. This article is a U.S. Government work and is in the public domain in the USA.
American Journal of Industrial Medicine
Volume 57, Issue 2, pages 129–137, February 2014
How to Cite
Kreiss, K. (2014), Work-related spirometric restriction in flavoring manufacturing workers. Am. J. Ind. Med., 57: 129–137. doi: 10.1002/ajim.22282
- Issue published online: 9 JAN 2014
- Article first published online: 22 NOV 2013
- Manuscript Accepted: 26 OCT 2013
Additional supporting information may be found in the online version of this article at the publisher's web-site.
|ajim22282-sm-0001-SupFig-S1.docx||296K||FIGURE S1. SPIROLA screenshot plots for longitudinal changes in (A) forced expiratory volume in one second (FEV1), (B) forced vital capacity (FVC), and (C) percent predicted FEV1 and FVC, and FEV1/FVC ratio (expressed as percent) for a flavoring manufacturing employee. A, B: Plotted are the regression lines (Regr. line) for the serial measurements, the 5th and 0.1 percentile lower limits of normal (LLN) calculated from age, height, and gender, the American College of Occupational and Environmental Medicine (ACOEM) criterion for excessive decline of 15% and 30 ml/year for FEV1, and the relative lower limit of decline (LLDr) of 12.4% and 30 ml/year) for the quality of spirometry (5% intra-individual variation). This employee had excessive falls in FEV1 and FVC despite having normal spirometry values above the LLN line. C: Plotted are the FEV1 and FVC percent predicted measurements, the FEV1/FVC ratio, and 100th and 70th percentile lines. These show that the employee initially had FEV1 and FVC values well above average (both 120% predicted) that fell to slightly below average (96% and 94% predicted, respectively) on last measurement. The FEV1/FVC ratio remained normal and stable, consistent with a pattern that might result in restriction if FVC eventually fell below the lower limit of normal. ACOEM, American College of Occupational and Environmental Medicine; FEV1, Forced expiratory volume in 1 s; FVC, Forced Vital Capacity; FEV1/FVC, Ratio of forced expiratory volume in 1 s to forced vital capacity, expressed as percent; Regr. line, Regression line; LLN, lower limit of normal (5th percentile), 0.1th percentile; LLDR, Relative lower limit of decline.|
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