Please assess the completion status of the following clinical trial:

Trial Title: Study Comparing 3 Different Treatments for Arthritis of the Lower Back (Lumbar Spinal Stenosis)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: None
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Minimum age of 60 years~* Can read/write English and understand directions~* Diagnosis of lumbar spinal stenosis confirmed by CT or MRI scan~* Has limitation of standing and/or walking tolerance~* Willing to attend treatments 2 times per week for 6 weeks~* Ability to walk at least 50 feet without the need for a cane or walker~Exclusion Criteria:~* History of metastatic cancer~* Advised by a physician not to exercise~* History of lumbar surgery for spinal stenosis or previous lumbar fusion~* Presence of severe peripheral artery disease in legs~* Severe hypertension: Systolic \> 200 mm/hg or Diastolic \> 110 mm/hg~* Ankle brachial index \< 0.8~* Neurologic or neurodegenerative disease other than stenosis that severly impairs the ability to walk~* Presence of cauda equina symptoms (saddle paresthesia, progressive loss of bladder/bowel function, etc)

- Gender: ALL
- Minimum Age: 60 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Medical Care (Type: ACTIVE_COMPARATOR): Non-steroidal anti-inflammatory drugs (NSAIDs); adjunctive analgesics; adjunctive anti-depressants. Participants assigned to this group will see a board certified physical medicine and rehabilitation physician for a history and examination, after which a determination will be made about a course of treatment that involve medications that are individualized to the needs of each patient.~* NSAIDs: ibuprofen, celecoxib, or diclofenac/misoprostol~* Adjunctive analgesics: acetaminophen, tramadol, or gabapentin~* Adjunctive antidepressant agents: nortriptyline, duloxetine, sertraline, trazodone, or mirtazapine~Lumbar epidural injection: these will be prescribed by the physician if warranted due to severity of symptoms or lack of adequate response to oral medications.
- Group Exercise (Type: ACTIVE_COMPARATOR): Group Exercise: community setting. This arm will involve attendance at community based group exercise classes that are taught by senior physical fitness instructors. These classes are designed specifically for older adults. Exercise frequency will be 2 times per week, for a total of 12 visits over the 6-week research period. These exercise classes will be attended at local community senior centers which cater to the needs of older adults. The subjects can self-select which particular exercise class they prefer to attend, based upon their level of fitness and physical function.
- Manual therapy and exercise (Type: ACTIVE_COMPARATOR): This group of subjects will be treated with a combination of manual therapy and rehabilitative exercise procedures that are commonly used in the physical therapy and chiropractic professions. Subjects will be treated at a frequency of 2 times per week, for a total of 12 visits over the 6-week research period. Treatments will be provided by licensed physical therapists and chiropractors using a combination of Joint Mobilizations (spine, sacroiliac, hip), muscle stretching and strengthening exercises.~Individualized exercises: clinical setting. These exercises will be tailored to the individual needs of each research participant by the treating physical therapist or chiropractor.

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