Applicability of American and European spirometry repeatability criteria to Korean adults

Hoon Park Byung, Suk Park Moo, Young Jung Woo, Kwang Byun Min, Cheol Park Seon, Yun Shin Sang, Ho Jeon Han, Soo Jung Kyung, Ae Moon Ji, Kyu Kim Se, Joon Chang, Kyu Kim Sung, Vogue Ahn Song, Yeon Mok Oh, Do Lee Sang, Sam Kim Young

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Background: The objective of this study was to evaluate the clinical applicability of the repeatability criteria recommended by the American Thoracic Society/European Respiratory Society (ATS/ERS) spirometry guidelines and to determine which factors affect the repeatability of spirometry in Korean adults. Methods: We reviewed the spirometry data of 4,663 Korean adults from the Korean National Health and Nutritional Examination Survey (KNHANES) Chronic Obstructive Pulmonary Disease Cohort (COPD cohort) and the Community-based Cohort Study VI-Fishing village/Islands (community cohort). We measured the anthropometric factors and differences between the highest and second-highest FVC (dFVC) and FEV1 (dFEV1) from prebronchodilator spirometry. Analyses included the distribution of dFVC and dFEV1, comparison of the values meeting the 1994 ATS repeatability criteria with the values meeting the 2005 ATS/ERS repeatability criteria, and the performance of linear regression for evaluating the influence of subject characteristics and the change of criteria on the Spirometric variability. Results: About 95% of subjects were able to reproduce FVC and FEV1 within 150 ml. The KNHANES based on the 1994 ATS guidelines showed poorer repeatability than the COPD cohort and community cohort based on the 2005 ATS/ERS guidelines. Demographic and anthropometric factors had little effect on repeatability, explaining only 0.5 to 3%. Conclusion: We conclude that the new spirometry repeatability criteria recommended by the 2005 ATS/ERS guidelines is also applicable to Korean adults. The repeatability of spirometry depends little on individual characteristics when an experienced technician performs testing. Therefore, we suggest that sustained efforts for public awareness of new repeatability criteria, quality control of spirograms, and education of personnel are needed for reliable spirometric results.

Original languageEnglish
Pages (from-to)405-411
Number of pages7
JournalTuberculosis and Respiratory Diseases
Issue number5
StatePublished - Nov 2007


  • Quality control
  • Repeatability
  • Spirometry


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