Between 10 and 20% of lung cancers are of occupational origin. Screening for occupational risk factors is part of the diagnostic workup. A self-administered questionnaire to detect lung carcinogens of occupational origin, the RECAP questionnaire, was drawn up and validated with a view to limiting under-declaration of lung cancer as an occupational disease (OD). Aims: Optimal administration conditions were investigated, to facilitate systematic use in the management of patients admitted to hospital with lung cancer. Methods : The various care pathways of lung cancer patients were first studied in two centres, to identify the health-care professionals involved in medical management, the various care sites and the stages of treatment. A focus group of health-care professionals was set up, and semi-directive interviews were conducted with 24 patients. Results : Caregivers tended to suggest that a physician or nurse should present the RECAP questionnaire, whereas patients rather chose non-caregiver staff, seeing the undertaking as being ?administrative' in nature. Some caregivers and patients thought the questionnaire should not be administered at the outset of treatment, due to the psychological trauma entailed by diagnosis. Administration during chemotherapy was recommended by patients, as they are more freely available at that time, and by caregivers, who thought patients better able to pay attention then. Conclusions :The study highlighted patients' lack of information on how lung cancer can be recognized as an OD. Implementing the RECAP questionnaire should facilitate patients' claims for insurance cover for lung cancer as an OD.