Fig. 1From: Decreased COPD prevalence in Sweden after decades of decrease in smokingPrevalence of a CAO and COPD and b CAO GOLD ≥ 2 and COPD GOLD ≥ 2 by age and packyears of smoking. CAO = post-BD FEV1/FVC < 0.7, COPD = CAO in combination with respiratory symptomsBack to article page