Figure 3.

Associations of sensitization/exposure status with adverse outcomes in chronic obstructive pulmonary disease; subgroup analysis based on GOLD spirometry classes. *Statistically significant interaction (P < 0.05). GOLD spirometry class 2 includes individuals with FEV₁ ⩾50% predicted. GOLD spirometry class 3–4 includes individuals with FEV₁ <50% predicted. GOLD = Global Initiative for Chronic Obstructive Lung Disease; mMRC = modified Medical Research Council dyspnea score; OR = odds ratio; SGRQ = St. George’s Respiratory Questionnaire.