Please assess the completion status of the following clinical trial:

Trial Title: Virtual Reality Treatment for Adults With Chronic Back Pain

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

Eligibility Criteria:
Inclusion Criteria:~* Participants aged 21 to 70 with Chronic Back Pain.~* Chronic Back Pain will be defined according to criteria established by recent NIH task force. Pain duration must be ≥ 3 months, with back pain being an ongoing problem for at least half the days of last 6 months; i.e., either pain every day for past 3 months, or half or more of the days for past 6+ months.~* Subjects must rate pain intensity at ≥ 4/10 on Brief Pain Inventory (average pain over the last week).~* Participants must also be comfortable and able to communicate via email, text message, or phone in English. Participants must also be comfortable using a video-conferencing service such as Zoom to complete the on-line sessions.~Exclusion Criteria:~* Applicants, who are pregnant, planning pregnancy, or breastfeeding~* Back pain associated with compensation / litigation within 1 year.~* Leg pain greater than back pain (suggests neuropathic pain; may be less responsive to psychological therapy).~* Chronic pain other than chronic back pain.~* Diagnoses of schizophrenia, multiple personality dissociative identity disorder.~* History of major depressive disorder not controlled with medication or other conditions that produce significant cognitive or emotional disability.~* History of substance abuse.~* Inability to undergo MRI (determined at screening; see XVI: Risks to Participants).~* Any clinically significant unstable medical abnormality or acute or chronic disease of cardiovascular, gastrointestinal, respiratory (e.g., chronic obstructive pulmonary disease), hepatic, or renal systems; including: history of cardiovascular disease or issues (e.g., recent heart attack), stroke; brain surgery, or brain tumor; Diabetes; cancer (last 12 months); diagnosis of a specific inflammatory disorder: rheumatoid arthritis, polymyalgia rheumatica, scleroderma, Lupus; polymyositis; or Cauda Equina syndrome.~* History of seizure disorder, epilepsy, convulsions, or increased intracranial pressure anytime except pediatric febrile seizures.~* History of vertigo, dizziness, susceptibility to motion sickness~* History of head injury within 6 months,~* Unexplained, unintended weight loss of 'â• 20 lbs in past year.~* Self-reported history of (digital) eye strain or computer vision syndrome.~* Unable or unwilling to meet study attendance requirements.~* MRI contraindications as determined by MRI safety screen (e.g., pregnancy, metal in body, claustrophobia, using the standard screen conducted by the MRI imaging facility).

- Gender: ALL
- Minimum Age: 21 Years
- Maximum Age: 70 Years
- Healthy Volunteers: f

Study Arms:
- Therapy Group (Type: EXPERIMENTAL): Therapy Group participants start the treatment period with three 1 ½ hour introductory sessions:~1. An education session on the science behind chronic pain and a basic overview of the VR therapy.~2. A session to customize the VR experience to match the participant's own pain experience.~3. A training session on the use of the VR hardware and software.~Upon completion, participants begin using the VR therapy app at home once a day, 5 times a week (minimum), for a total of 8 weeks. The VR app contains different training exercises. A workbook provides a schedule and background on each of the training sessions.~Therapy Group participants may continue their other pain treatment regimes, and are asked to notify the research team of any changes.
- Standard of Care (SOC) Group (Type: NO_INTERVENTION): The SOC Group (no-intervention) completes a daily pain survey. SOC Group participants are asked to maintain their pain treatment regimes, and are asked to notify the research team of any changes.

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

Answer: outcome: complete