Severity of Lung Impairment
Severity* | Z-Score |
|---|---|
Mild | -1.65 to -2.5 |
Moderate | -2.51 to -4.0 |
Severe | <-4.1 |
* Z-scoring for lung impairment severity uses the number of standard deviations from the predicted mean to grade dysfunction. Normal z-scores are > -1.65. | |
Data from Stanojevic S, Kaminsky DA, Miller MR, et al. ERS/ATS technical standard on interpretive strategies for routine lung function tests. Eur Respir J. 2022;60(1):2101499. doi:10.1183/13993003.01499-2021 | |
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