Table 1

Inclusion and exclusion criteria

Inclusion criteria
Participant plans to continue enrollment in health plan
Between 18 and 70 years of age
At least one primary care visit for back pain within the past 3–12 months
Non-specific, uncomplicated low back pain, i.e., ICD-9 codes:
     724.2 Lumbago
     724.5 Backache, unspecified
     724.8 Other symptoms referable to back
     846.0-9 Sprains and strains, sacroiliac
     847.2 Sprains and strains, lumbar
     847.3 Sprains and strains, sacral
     847.9 Sprains and strains, unspecified site of the back
Physician willing to have patients included in the study
Lives within 45 minutes travel time from study clinic

Exclusion criteria
Previous acupuncture for any reason
Low back pain lasting less than 3 months
Mild symptoms (less than 3 on 0 to 10 pain bothersomeness scale)
Specific diseases that could be cause of back pain (metastatic cancer, discitis, herniated disc, vertebral fracture, spinal infection, osteitis condensans ilii, severe or progressive scoliosis, spinal stenosis, spondylolisthesis, ankylosing spondylitis)
Complicated back problems (sciatica, back surgery in prior 3 years)
Other disabling chronic conditions that might confound treatment effects or interpretation of data (e.g., disabling heart or lung disease, diabetic neuropathy, active hepatitis, fibromyalgia, rheumatoid arthritis)
Acupuncture contraindicated or safety not confirmed (clotting disorders, on anticoagulant therapy, heart pacemaker, pregnancy, seizure disorder)
Medico-legal issues (seeking or receiving compensation/litigation for back pain)
Conditions possibly making consenting or treatment difficult (paralysis, inability to lie prone for 45 minutes, major psychoses, dementia, scheduling conflicts, severe vision or hearing problems, lack of transportation, unable to read or speak English)

Cherkin et al. Trials 2008 9:10   doi:10.1186/1745-6215-9-10