Please assess the completion status of the following clinical trial:

Trial Title: Ultrasound Guided Epidural Block in Axial SPA

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: SINGLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* all participants fulfilled the ASAS criteria for axial SPA~* all participants under treatment including bDMARDS and sDMARDs beside NSAIDs~Exclusion Criteria:~* Naive patients not under treatment~* limitation of spine flexion due to non inflammatory causes

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

Study Arms:
- Epidural block (Type: ACTIVE_COMPARATOR): Group I patients received caudal epidural injections with 1% lidocaine hydrochloride (xylocaine Astra Zeneca) 9 mL mixed with 1 mL of triamcinolone 40 milligrams (Kenacort Bristol Myers Squip)
- control group (Type: NO_INTERVENTION): patients did not receive injection

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