Article Text

PDF
Letter
Fixed FEV1/FVC ratio <0.7 for identifying airflow limitation: not a good idea in occupational settings
  1. Eva Hnizdo,
  2. Edward L Petsonk
  1. Division of Respiratory Disease Studies, National Institute for Occupational Health and Safety, Morgantown, West Virginia, USA
  1. Correspondence to Dr Eva Hnizdo, Division of Respiratory Disease Studies, National Institute for Occupational Health and Safety, Morgantown, WV 26508, USA; exh6{at}cdc.gov

Statistics from Altmetric.com

Dr Søyseth and colleagues recently reported an increased prevalence of airflow limitation in workers employed in the Norwegian smelting industry and significant associations with workplace dust exposures.1 The prevalence of airflow limitation was assessed using prebronchodilator spirometry and two measures of airflow limitation: FEV1/FVC ratio <0.7 and FEV1/FVC ratio <lower limit of normal (LLN). When compared across age categories (<35, 35–44, ≥45 years), the prevalence of airflow limitation based on the ratio <0.7 versus LLN was approximately doubled in the ≥45 years age categories across all levels of exposure duration (overall ≈17.6 vs ≈8.8%). The rate of FEV1 decline was increased for prevalent and incident cases of airflow limitation defined by both criteria, but it would be of interest to see the rates of decline for workers with FEV1/FVC <0.7 …

View Full Text

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.