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NHANES Spirometry Normal Values

These NHANES 1999 regressions are recommended for ethnically appropriate individuals by the ATS/ERS Task Force:2005 ‘Standardization of Lung Function Testing’. They are used all over The Americas and elsewhere. The tables below are for mean normal value (Predicted) and the Lower Limit of Normality (LLN).

Select your preferred regression set from the links below then enter the subjects demographics in the boxes below to automatically find the correct values within the reference tables.

References

Hankinson JL, Odencrantz JR, Fedan KB. Spirometric reference values from a sample of the general U.S. population. Am J Respir Crit Care Med 1999;159:179–187.

American Thoracic Society. Lung function testing: selection of reference values and interpretative strategies. Am Rev Respir Dis 1991;144:1202–1218.