Please select the eligibility criteria that correspond to the clinical trial below.
Title: Yoga Dosing Study for Chronic Low Back Pain in a Predominantly Low-Income Minority Population
Brief Summary: A 12-week randomized controlled trial (RCT) for chronic low back pain in predominantly minority populations comparing yoga classes once/week vs. twice/week. Primary outcomes are pain intensity and measure of disability; secondary outcomes are pain medication use, treatment adherence, and health-related quality of life.


Options:
A: Inclusion Criteria:

* Patients with chronic non-specific low back pain diagnosed and at least 12 weeks of mechanical pain.

Exclusion Criteria:

* Patients:
* With arterial hypertension diagnosed.
* With progressive neurological deficits.
* Pregnant or suspect that they are pregnant.
* With psychological or psychiatric process diagnosed.
* Under analgesic treatment.
B: Inclusion Criteria:

* Subjects of both genders between 18 and 65 years of age with chronic non-specific LBP (pain for more than 3 months) with a pain intensity of at least 3 points measured by a 0-10 points pain numerical rating scale
* Subjects must be able to stand and walk independently
* Subjects must be able to read in Portuguese

Exclusion Criteria:

* Subjects with any contraindication to physical exercise according to the guidelines of the American College of Sports Medicine
* Subjects with severe depression (measured by depression, anxiety and stress scale - DASS)
* Subjects with serious spinal pathologies (fractures, tumors, and inflammatory pathologies such as ankylosing spondylitis), nerve root compromise (disc herniation and spondylolisthesis with neurological compromise, spinal stenosis, and others), serious cardiorespiratory diseases, previous back surgery or pregnancy.
* Subjects that cannot be classified into any of the five categories of the Movement System Impairment model upon initial assessment
C: Inclusion Criteria:

* all patients with non-specific LBP for more that 8 weeks duration
* mechanical provocation of pain with postures, movement and activities
* localised pain in the area from T12 to gluteal folds
* moderate ongoing LBP with a VAS \> 2/10
* disability had to be higher than 14% on Oswestry Disability Index

Exclusion Criteria:

* sick listed for more than 4 months continuous duration
* acute exacerbation of LBP
* radicular pain with positive neural tissue provocation test
* any low limb surgery on the last 3 months
* surgery involving the lumbar spine (fusion)
* pregnancy
* psychiatric disorders - somatisation
* dominant psycho-social problems
* widespread non-specific pain disorder (no primary LBP focus)
* specific diagnoses: active rheumatologic disease, progressive neurological disease, serious cardiac or other internal medical condition, malignant basic diseases, acute traumas, infections, or acute vascular catastrophies
D: Inclusion Criteria:

* 18-64 years old
* Current non-specific low back pain persisting \>12 weeks. Mean low back pain intensity for the previous week 4 or greater on a 0 to 10 numerical rating scale (0=no pain to 10=worst possible pain).
* English fluency sufficient to follow treatment instructions and answer survey questions
* Willingness to list comprehensive contact information for at least one (preferably two) friend, family member, or work colleague who will always know how to contact the participant.

Exclusion Criteria:

* Use of yoga in the previous 6 months
* New CLBP treatments started within the previous month or anticipated to begin in the next 12 months
* Pregnancy
* Back surgery in the previous three years
* Specific CLBP pathologies
* Severe or progressive neurological deficits
* Sciatica pain equal to or greater than back pain
* Active substance or alcohol abuse
* Active or planned worker's compensation, disability, or personal injury claims

Answer: D