Please assess the completion status of the following clinical trial:

Trial Title: Metformin as Adjuvant Therapy in Obese Knee Osteoarthritis Patients

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE2/PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Patients have symptomatic and radiological evidence of OA in one or both knee joints.~* Age ≥ 45 years.~* Both obese male and female will be included (BMI ≥ 30 kg/m²).~Exclusion Criteria:~* Patients with inflammatory rheumatic diseases, crystal deposition arthritis or infection-induced OA.~* Patient with hypertension or diabetes mellitus.~* Patient with hepatic or renal impairment.~* Patients who have active peptic ulcer.~* Patients with positive malignancy.~* Steroid injection into the affected knee joint within 3 months of recruitment for the study.~* Pregnant or lactating female patients.

- Gender: ALL
- Minimum Age: 45 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Placebo group (Type: EXPERIMENTAL): Placebo tablet twice daily + celecoxib 200mg capsule once daily for 12 weeks.
- Metformin group (Type: EXPERIMENTAL): Metformin 500mg tablet twice daily + celecoxib 200mg capsule once daily for 12 weeks.

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