Please assess the completion status of the following clinical trial:

Trial Title: Prevalence of Sleep Apnea in Patients Presenting for Hip or Knee Replacement Surgery

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: OTHER
- Primary Purpose: None
- Time Perspective: RETROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* 18 years old and older~* Planned total hip or total knee arthroplasty~* Referral to the internal medicine preoperative evaluation clinic~Exclusion Criteria:~• None

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Berlin (Type: None): Patients diagnosed with obstructive sleep apnea by polysomnography after being screened with the Berlin questionnaire.

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