Figures & data
Table 1 Baseline characteristics of COPD groups B and D with 2017 classification
Figure 1 The natural courses of GOLD B patients over 1 year.
Notes: (A) The distribution of COPD groups at baseline according to the 2017 GOLD classifications (n=2,010). Of the 1,261 GOLD B patients at baseline (A), 625 patients were attended 1-year follow-up and 432 patients (69.1%) of them remained in GOLD B at 1 year (B).
Figure 2 Distribution of COPD groups by GOLD classifications.
Notes: (A) Distributions of COPD groups by reference to the 2011 GOLD classifications. (B) Cumulative patient numbers in the various COPD groups using the 2011 and 2017 GOLD criteria. (C) Changes in groups of COPD patients according to the GOLD classifications.
Table 2 Comparison of baseline characteristics between GOLD B patients who remained GOLD B (BB) and those who degenerated to GOLD D (BD), at 1 year post-diagnosis
Table 3 Multivariate analysis of baseline factors associated with progression from GOLD B to GOLD D over 1 year
Figure 3 (A) Changes in FEV1 from baseline to 1 year in groups BB and DD. (B) More patients in group BD than in group BB exhibited a rapid FEV1 decline (>60 mL).
Notes: *P=0.045; **P=0.040. BB, GOLD B patients who remained GOLD B; BD, GOLD B patients who degenerated to GOLD D.
