Please assess the completion status of the following clinical trial:

Trial Title: Sleep Apnea in Sickle Cell Disease

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: BASIC_SCIENCE
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Homozygous HbS (Hemoglobin S) (SS) patients,~* aged between 15 and 3 months and 50 years old,~* in steady state (i.e. without vaso-occlusive crisis or recent blood transfusion),~* followed by the sickle cell center of the Hospices Civils de Lyon,~* and showing symptoms of OSA.~Exclusion Criteria:~* Patients receiving treatment of OSA,~* recent blood transfusion (less than 2 months),~* patients not at steady state (VOC or acute chest syndrome less than 2 months),~* pregnancy.

- Gender: ALL
- Minimum Age: 15 Years
- Maximum Age: 50 Years
- Healthy Volunteers: f

Study Arms:
- SS patients (Type: ACTIVE_COMPARATOR): Homozygous sickle cell patients~Each patient will undergo the following:~1. polysomnography and oxygen saturation exam~2. calculation of VOC rate within the two previous years~3. Blood samples~4. Physiological measurements
- SS patients apneic (Type: EXPERIMENTAL): Homozygous sickle cell patients after one year of continuous positive airway pressure treatment~Each patient will undergo the following:~1. polysomnography and oxygen saturation exam~2. calculation of VOC rate within the two previous years~3. Blood samples~4. Physiological measurements

Based on this trial design, predict the completion outcome and termination type (if applicable).