Please assess the completion status of the following clinical trial:

Trial Title: Slump Sitting X-ray of the Lumbar Spine Is Better Than Conventional Flexion View

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

Eligibility Criteria:
Inclusion Criteria:~* Patients above 45 years of age;~* With mechanical low back pain,~* With spondylolisthesis~* Physically able to position themselves correctly for both methods of X-rays~Exclusion Criteria:~* Previous spinal interventions~* Suspected findings for spinal malignancies, spinal trauma, and inflammatory spinal diseases~* Pregnant women

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

Study Arms:
- Slump sitting (Type: EXPERIMENTAL): Slump sitting flexion of lumbar spine
- Forward bending (Type: ACTIVE_COMPARATOR): Forward erect bending of lumbar spine

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