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Table 2 Characteristics of COPD patients according to GOLD classification of disease severity

From: The role of IREB2 and transforming growth factor beta-1 genetic variants in COPD: a replication case-control study

GOLD Status Moderate II Severe III Very Severe IV P-value
Male (%) 74.9 67.1 67.6 0.0461
Age (yr) 66.0 ± 7.9 66.6 ± 8.4 64.3 ± 8.0 0.0021
Pack Years 49.5 ± 21.3 48.4 ± 22.4 48.6 ± 26.0 0.8043
Predicted FEV 1 (%) 60.3 ± 5.9 39.9 ± 5.8 23.5 ± 4.3 <0.0001
FEV 1 /FVC (%) 57.1 ± 7.8 45.9 ± 9.9 36.2 ± 9.4 <0.0001
N 350 414 238  
  1. Values indicated are means ± SD. Pack years missing for 3, 2, 1 persons per classification respectively.