The 6-minute walk test is a simple exercise test, reproducing a daily physical activity. The utility of this test is described in several chronic lung diseases (chronic obstructive pulmonary disease, idiopathic pulmonary arterial hypertension). The distance performed during the 6MWT and / or desaturation during the 6MWT is a prognostic factor that contributes to the assessment of patients for lung transplantation indication.~The 6MWT is practiced routinely in cystic fibrosis centers but its usefulness in this disease has not been shown. Also the results of this test are not part of the decision-making criteria for lung transplantation.~A single-center study performed in adults CRCM at Cochin Hospital suggests the prognostic value of the 6MWT in patients with adult's cystic fibrosis.~The principal objective of this study is to assess the prognostic of 6MWT as part of the cystic fibrosis. The primary endpoint will be to assess the survival without lung transplant during the follow up period of 3 years. In this context, this prognostic tool could be used to help to determine the best time to consider a lung transplant in cystic fibrosis patient.
The purpose of this study is to determine whether the 6-minute walk test (6MWT) could be a prognostic factor for cystic fibrosis patients.