Sequential comparative prospective interventional study evaluating the impact of the use of an optimization device of the decision of cancer treatment on aggressiveness of end of life care. Comparison between a first period, period (A), of care as usual and a second period, period (B), of systematic and iterative use of a device for optimizing the decision to continue an anti-cancer treatment.

We propose to study the optimization of this decision process in an advanced Non-Small-Cell Lung Carcinoma (NSCLC) population, with a Performance Status (PS) ≥ 2 (median survival of approximately 3 months) piloting iteratively (before each decision to continue treatment) a process consisting of an evaluation framework (30 items to be answered by the oncologist with the patient), consolidating:

1. clinical parameters;
2. doctors' expectations regarding the continuation of anticancer treatment;
3. patient expectations and preferences;
4. the possibility of referring the patient to a supportive care specialist and strengthening home care.

The process triggers a dialogue between the patient and the oncologist, based on facts and seeks objectivity, ultimately allowing a shared decision.

In this prospective comparative study, the rate of systemic oncological treatment during the last month of life will be measured consecutively, over a period of usual management, followed by a period of systematic application of a process of optimization of the medical decision.

Inclusion Criteria:

1. Histologically or cytologically proven non-small-cell lung carcinoma (NSCLC) including NSCLC with oncogene addiction.
2. Stage IV or IIB/IIIC non irradiable (8th classification TNM, UICC 2015)
3. Patient having completed at least one line of chemotherapy in the context of metastatic disease (or in the context of locoregional disease if the last chemotherapy was less than 6 months ago).
4. ECOG Performance Status ≥ 2.
5. Age ≥ 18.
6. Written informed consent.
7. Patient capable, according to the investigator, to comply with the requirements of the study.

Exclusion Criteria:

1. Small Cell Lung Cancer (including mixed forms).
2. Patient with NSCLC for whom a decision has already been made to permanently discontinue all systemic cancer treatment.
3. Impossible follow up for geographical, social or psychological reason.
4. Inability to answer a questionnaire (language or neurological barrier).
5. Patient under guardianship.
6. Patient being treated in a therapeutic trial.
7. Patient not covered by social security. -

Sponsor will share de-identified data sets Documents generated under the project will be disseminated in accordance with Institut Curie policies.

Data requests can be submitted starting 9 months after last article publication and will be made accessible for up to 12 months.

Access to trial individual participant data can be requested by qualified researchers engaging in independent scientific research, and will be provided following review and approval of a research proposal and Statistical Analysis Plan (SAP) and execution of a data sharing agreement (DSA).