Preoperative umeclidinium/vilanterol or tiotropium improves postoperative FEV₁ in lung cancer patients with comorbid untreated chronic obstructive pulmonary disease.

In this study, there was no significant difference in postoperative complications between the intervention and untreated groups, although the intervention group showed a trend toward fewer complications (32.8% vs. 41.9%, P=0.49).

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