Please select the eligibility criteria that correspond to the clinical trial below.
Title: Evaluating Yoga for Chronic Low Back Pain
Brief Summary: This study will compare the effectiveness of yoga classes, exercise classes, and a self-care book in the management of pain and function for people with low back pain.


Options:
A: Inclusion Criteria:

* Aged between 18 and 75
* Chronic low back pain greater than 6 months duration
* Score greater than 14% for disability on Oswestry Disability Index (ODI)
* Independently mobile (with or without aids), to be capable of participating in a rehabilitation programme

Exclusion Criteria:

* Primary pain area is not the lumbar spine (from T12-buttocks)
* Leg pain as the primary problem (nerve root compression or disc prolapse with true radicular pain/radiculopathy, lateral recess/central or spinal stenosis with primary leg pain)
* \<6 months post lumbar spine or lower limb or abdominal surgery
* Pain relieving procedures such as injection based therapy (e.g epidurals) and day case procedures (e.g rhizotomy) in the last 3 months
* Pregnancy
* Rheumatologic/inflammatory disease (e.g. rheumatoid arthritis (RA), ankylosing spondylitis (AS), psoriatic arthritis, lupus, scheuermann's disease)
* Progressive neurological disease (e.g. multiple sclerosis (MS), parkinson's disease (PD), motor neuron disease (MND)
* Unstable cardiac conditions
* Red flag disorders like malignancy/cancer, acute traumas like fracture (\<6 months ago) or infection, spinal cord compression/cauda equina
B: Inclusion criteria:

* Group Health Cooperative enrollee
* Uncomplicated low back pain
* At least moderate pain levels

Exclusion criteria:

* Sciatica persisting 3 or more months after physician visit
* History of cancer (other than nonmelanoma skin cancer)
* Severe disk problems
* Unstable medical conditions
* Back surgery within past 3 years
* Physically unable to do the yoga or exercise classes and homework
* Unable to attend classes
* Currently doing yoga
* Taken exercise class for back pain within past year
* Currently in litigation for back pain
* Seeking other treatment for back pain
C: Inclusion Criteria:

* Sub-Acute and chronic low back pain (Defined as current episode more than 6 weeks duration.)
* Quebec Task Force classifications 1, 2, 3 and 4. (This includes patients with back pain, stiffness or tenderness, with or without musculoskeletal signs and neurological signs.{1570})
* 65 years of age and older
* Independent ambulation
* Community dwelling (residency outside nursing home)
* Score of 20 or more on Folstein Mini-Mental State Examination{13246}
* Stable prescription medication plan (no changes in prescription medications that affect musculoskeletal pain in previous month)

Exclusion Criteria:

* Referred low back pain from local joint lesions of the lower extremities or from visceral diseases
* Significant infectious disease Determined by history or by referral to supplementary diagnostic tests
* Ongoing treatment for low back pain by other health care providers
* Mean baseline low back pain score of 20 percentage points or less
* Contraindications to exercise Determined by history or by referral to supplementary diagnostic tests (i.e., uncontrolled arrhythmias, third degree heart block, recent ECG changes, unstable angina, acute myocardial infarction, acute congestive heart failure, cardiomyopathy, valvular heart disease, poorly controlled blood pressure, uncontrolled metabolic disease
* Contraindications to spinal manipulation (i.e. Progressive neurological deficits blood clotting disorders; infectious and non-infectious inflammatory or destructive tissue changes of the spine; severe osteoporosis)
D: Inclusion Criteria:

* Daily LBP, dominating over possible pain in leg or other joints/muscles
* Pain og \> 4 (scale 0-10) for more than 4 months

Exclusion Criteria:

* Cancer, inflammatory disease, previous back surgery, pregnancy

Answer: B