Please assess the completion status of the following clinical trial:

Trial Title: Persona MC vs Attune Total Knee Replacement Study

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

Eligibility Criteria:
Inclusion Criteria:~1. Aged 18 years and above\*~2. Have undergone primary total knee replacement for either:~   1. Osteoarthritis~  2. avascular necrosis of the femur or tibia~3. Report an Oxford Knee Score greater than 34, obtained from usual clinical practice. OKS above 34 represents (range 0-48, high representing good outcome) a good outcome post-surgery.~4. Independent of study participation, patients received either commercially available Zimmer Biomet Persona MC bearing or DePuy Synthes Attune knee implants implanted in accordance with product labelling~5. 1-5 years post TKR surgery~6. An adequate understanding of written and verbal information in English in order to provide informed consent and answer the study questionnaires\* \* Control participants will meet same inclusion criteria except no primary TKR and OKS will not be required~Exclusion Criteria:~1. History of infection in the replaced joint and/or other local/systemic infection that may affect the prosthetic joint~2. Skeletal immaturity~3. Neuropathic arthropathy~4. Osteoporosis/any loss of musculature or neuromuscular disease that compromises the affected limb~5. Severe instability secondary to the absence of collateral ligament integrity~6. Pregnancy - routine clinical practice ensures that all female patients are asked whether they are pregnant and can safely receive x-rays or surgery as per standard consent forms~7. Patient is a member of a protected population (e.g., prisoner, mentally incompetent, etc.)~8. Patient has previously received partial or total knee arthroplasty for the ipsilateral knee~9. Patients who are unable to give voluntary informed consent.~10. Patients who are unable to walk unaided (post-surgery).~11. BMI \> 40~    \*\* Control participants will meet the same exclusion criteria as TKR patients~12. Patients who suffer with cognitive impairment such as Parkinson's or Alzheimer's disease resulting in impaired mental capacity.~13. Patients who are unable to walk unaided.~14. Patients who suffer from dizzy spells or fainting episodes.

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

Study Arms:
- Persona TKR (Type: None): Patients will have undergone a medial congruent Persona total knee replacement
- Attune TKR (Type: None): Patients will have undergone a Attune total knee replacement
- Control participants (Type: None): Patients will not have recieved a primary TKR

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