Our primary purpose is to compare the prevalence of sleep disorders in children aged 6 to 17 with cystic fibrosis versus controls with a Sleep disorder screening score, the SDSC. Our hypothesis is that patients aged 6 to 17 with cystic fibrosis have a higher prevalence of sleep disturbances than the general population of the same age group.

Our secondary hypothesis is that these sleep disorders are mixed and that there are non-respiratory causes, sometimes modifiable by simple non-medical treatment and that's why our secondary purpose is to identify the responsible factors, in particular non-respiratory factors in the 2 groups and to compare them.

Inclusion criteria for the case group :

• Cystic fibrosis followed at the pediatric (Centre de Ressources et de Compétences de la Mucoviscidose) in Strasbourg
• Aged from 6 to 17 years old
• Non hospitalized
• Able to read and understand French language
• Accompanied by at least one of his parents

Inclusion criteria for the control group :

• Emergency surgical consultation
• Aged from 6 to 17 years old
• Non hospitalized
• Able to read and understand French langage
• Accompanied by at least one of his parents

Exclusion criteria:

• Children under 6 years old
• Children over 17 years old
• Children and parents who don't understand or can't read French language
• Hospitalized children
• Children unaccompanied by their parents

Children from 6 to 17 years with cystic fibrosis for the case group and children with an emergency surgical consultation for the control group