'What matters to me': an international online survey of people treating, affected by and living with lung cancer.

Aim: Lung cancer is a common malignancy that occurs worldwide and generally has a poor prognosis. Its diagnosis presents significant physical and emotional challenges for patients and their family, friends and caregivers (FFCs). This study aimed to gain insights into patients' and FFCs' perspectives regarding lung cancer and its treatment, as well as physicians' perceptions of patients' thoughts about their illness.