IL32 and chronic obstructive pulmonary disease: The statistical results showed that serum IL-32 concentration in stable COPD patients with GOLD-3 to 4 (186.5 ± 50.4 pg/mL), mMRC score of 4 (189.8 ± 48.2 pg/mL) and longer clinical medical history (187.6 ± 45.8 pg/mL for ≧ 20 years; 169.9 ± 51.1 pg/mL for history ≧ 10 < 20 years) was higher than that in patients with GOLD-1 to 2 (149.6 ± 52.3 pg/mL) (p = 0.026; Fig. 1B), mMRC score of 2 (154.1 ± 55.3 pg/mL) and 3 (155.3 ± 52.8 pg/mL) (p = 0.004; Fig. 1C) and shorter medical history (147.7 ± 48.9 pg/mL for history < 10 years) (p = 0.005; Fig. 1D).