Table 2– Disease classification according to the Global Initiative for Chronic Obstructive Lung Disease (GOLD) criteria of 2007 and 2013 of patients with new or confirmed chronic obstructive pulmonary disease (COPD)

	New COPD	Confirmed COPD
GOLD criteria 2007
GOLD I: mild	1 (1.2)	0 (0.0)
GOLD II: moderate	77 (91.6)	40 (80.0)
GOLD III: severe	5 (6.0)	9 (18.0)
GOLD IV: very severe	1 (1.2)	1 (2.0)
GOLD criteria 2013
A: low risk, fewer symptoms	9 (10.7)	4 (8.0)
B: low risk, more symptoms	69 (82.1)	36 (72.0)
C: high risk, fewer symptoms	0 (0.0)	0 (0.0)
D: high risk, more symptoms	6 (7.2)	10 (20.0)

Data are presented as n (%). New COPD: no diagnosis of COPD but COPD according to panel; confirmed COPD: diagnosis of COPD and COPD according to panel. GOLD criteria 2007 [15]: severity grading of COPD based on airflow limitation only: GOLD I, forced expiratory volume in 1 s (FEV₁) >80% predicted; GOLD II, FEV₁ <50% to ≤80% predicted; GOLD III, FEV₁ <30% to ≤50% predicted; GOLD IV, FEV₁ ≤30% predicted. GOLD criteria 2013 [1]: severity grading of COPD based on symptoms (assessed with Medical Research Council (MRC) dyspnoea scale) and airflow limitation: low risk, GOLD I–II; high risk, GOLD III–IV; fewer symptoms, MRC dyspnoea score 0–1; more symptoms: MRC dyspnoea score ≥2.