Adherence to Lung Cancer Screening by Low-dose Thoracic CT in Haut-Rhin Department, France.

Inclusion Criteria: * Patients aged 50 to 74 years * Smoking OR having smoked (withdrawal of \<15 years): ≥15 cigarettes/day for ≥25 years OR ≥10 cigarettes/day for ≥30 years * Affiliated or beneficiary of a social security scheme * Written informed consent Exclusion Criteria: * Inability to walk up two flights of stairs without stopping * BMI \> 35 kg/m² * Recent chest CT scan \< 1 year * Personal history of lung cancer \< 5 years or under treatment * Personal history of cancer being monitored by chest CT scan * Contraindication to lung cancer treatment or diagnostic investigations * Current or recent respiratory symptoms immediately suggestive of lung cancer * Pregnant or breast-feeding woman * Person under court protection, guardianship or curatorship * Person deprived of liberty by judicial or administrative decision.