Please assess the completion status of the following clinical trial:

Trial Title: The Influence of Needle-insertion Depth on Successful Epidurogram and Clinical Outcome in Caudal Epidural Injections

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

Eligibility Criteria:
Inclusion Criteria:~* Adult patients (20-80 years of age) who were scheduled to receive caudal epidural injection for lumbosacral radicular pain at our pain management clinic~Exclusion Criteria:~* pregnancy~* coagulopathy~* systemic infection~* any active infection at the injection site~* history of allergy to contrast media, local anesthetics, corticosteroid~* patients unable to communicate or patients with cognitive dysfunction

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: 80 Years
- Healthy Volunteers: f

Study Arms:
- Group A (Type: NO_INTERVENTION): Conventional method group (n=85): caudal injection after advancement of the needle into the sacral canal. Ultrasound is used to achieve accurate needle placement and we will check intravascular injection using digital subtraction angiography.
- Group B (Type: EXPERIMENTAL): New method group (n=85): same as conventional method group except caudal injection right after penetrating the sacrococcygeal ligament.

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