Figure 2From: Clinical impact of prevalence and severity of COPD on the decision-making process for therapeutic management of lung cancer patients Population of non-COPD and COPD in Japanese patients with lung cancer. Schematic presentation of the percentage of non-COPD (n = 123) and COPD (n = 147) among Japanese patients with lung cancer. Patients with COPD were classified by GOLD grade, that is, grade 1 (n = 95), grade 2 (n = 41), grade 3 (n = 11), and grade 4 (n = 0).Back to article page