Inclusion Criteria:  Concerning the patient :  Patient major Patient affected by cystic fibrosis Patient able to understand french Patient sable on Respiratory and nutritional status Patient with disorders of carbohydrate metabolism in the glucose tolerance test (OGTT) Patient with normal fasting blood sugar  Concerning the health professionals :  Medical and paramedical professionals practising in the adult Cystic Fibrosis Centers Competences (doctors, nurses, dieticians, psychologists, physiotherapists, etc...)  Exclusion Criteria:  Patient with transplant Patient who have received insulin therapy