Please assess the completion status of the following clinical trial:

Trial Title: Study Of Disc Anaesthesia For The Preoperative Diagnosis Of Chronic Lower Back Pain

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: DIAGNOSTIC
- Time Perspective: None
- Masking: NONE
- Phase: PHASE4
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* Age \> 21.~* Chronic axial low back pain without radicular pain for \> six months, not responding to at least three months of non-surgical management under the direction of a physician.~* One or two discs at L5/S1, L4/L5 or L3/L4 with abnormal findings by MRI, including any of the following: loss of disc hydration, loss of disc height, high intensity zone (HIZ), Modic changes at adjacent vertebral endplates, or herniation without nerve root compression.~* Subject states that he/she is willing to undergo lumbar spinal fusion, disc replacement, or other definitive treatment if eventual diagnosis supports such treatment.~* Physician believes that discography is clinically indicated for the purpose of surgical decision-making for the subject.~* Pre-treatment low back pain by numerical rating scale (NRS) score \> 4 (measured as average in last 24 hours on a 0-10 scale).~* Pre-treatment Oswestry Disability Index (ODI) \> 40 (0 - 100 scale).~* Subject states availability for all study visits.~* Subject is able to understand the risks and benefits of participating in the study and provides written informed consent.~Exclusion Criteria:~* Known osteoporosis or osteopenia, metabolic bone disorder, or history of chronic steroid use (the equivalent of 7.5 milligrams of daily prednisone use for \> 6 months).~* Suspected painful disc degeneration (based on clinical examination and MRI findings) outside of L5/S1, L4/L5 or L3/L4 levels.~* MRI shows disc abnormalities (listed in Inclusion Criteria #3) at all 3 lower lumbar discs (L3/L4, L4/L5 and L5/S1).~* Abnormal neurologic exam attributable to lumbar disc disease, herniation, or lumbar stenosis.~* Back, buttock or pelvic pain suspected to be due to spinal stenosis, spinal fractures, infection, cancer, facet arthropathy or other hip or pelvis pathology.~* Schmorl's node or endplate disruption evident on MRI at L5/S1, L4/L5, or L3/L4.~* Medical history, physical examination or radiographic evidence (e.g., disc height too narrow) to suggest that either PD or F.A.D. may not be technically feasible.~* Any previous lumbar spine fusion or disc replacement.~* More than grade 1 spondylolisthesis as assessed by x-ray or MRI.~* Significant clinical comorbidity that may potentially interfere with data collection or follow-up (e.g., dementia, severe comorbid illness).~* History of major depression, psychosis or somatization disorder, or panic disorder.~* Allergy to any materials used in PD or F.A.D. devices, contrast, lidocaine, or bupivacaine.~* Any evidence of disc or systemic infection.~* Pregnant or child-bearing potential and not currently on adequate birth control method.

- Gender: ALL
- Minimum Age: 21 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- PD and F.A.D. diagnostic testing (Type: OTHER): None

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

Answer: outcome: complete