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Table 3 Analysis of variance for ESI values among PRISm and GOLD stages and for subgroups with different emphysema severity (%LAA-950insp) at CT

From: Validation of a method to assess emphysema severity by spirometry in the COPDGene study

  NESI mean (SD)ANOVA /
Welch’s t-test
PRISm and GOLD stages PRISm6410.9 (0.4)p < .001
026460.9 (0.3)
14991.4 (0.4)
211692.1 (1.1)
36625.0 (2.1)
43138.3 (2.0)
%LAA-950inspNo Emphysema (< 6%)42231.1 (0.8)p < .001
Moderate Emphysema (6–14%)8662.4 (2.0)
Severe Emphysema (≥14%)8415.9 (2.8)