Sickle cell disease (SCD) is the most common genetic disease in France. Its consequences on patient's life-course and quality of life need to be precisely identified among French patients and their family to be able to improve patients care according to their specific needs.

The aim of the study is to accurately describe the impact of SCD on quality of life of patients living in France, or their family (for minor patients). The consequences of the disease on professional life, education and material condition of patients or their parents will be described by the patients themselves.

This is a retrospective study. Patients or parents of minor patients living in France and suffering from SCD will be informed about the study and enrolled during their usual follow-up, or by patients' associations. They will be asked to answer an anonymous survey online relating to their whole life-course with SCD and exploring different aspects of the consequences of the disease on their life. It contains 4 different sections:

1. socio-demographic questions to establish a respondent profile
2. health status of the respondent to establish the severity of the disease
3. education, professional life, material and economic situation
4. quality of life through MOS SF-36 questionnaire This is a one-shot survey, which will take approximatively 20 to 30 minutes to answer by the respondent.

Inclusion Criteria:

• 18 years or older
• Diagnosed with SCD or parent of a minor child diagnosed with SCD
• Able to speak and understand French
• Willing to participate to the study

Exclusion Criteria:

• Person having serious difficulties to read or speak French, unable to answer the questions
• Person suffering from other chronic disease which could bias the representation they have about SCD
• Patient cured with a bone marrow transplant
• Patient with mental disorder preventing the patient to understand the study

Adults or parents of minor children with SCD living in France.