Comparative Effectiveness Study for Surgery vs. Non-Surgery in Patients With Low Back Pain

Inclusion Criteria: 1. Herniated intervertebral disease, Low back pain over 6 weeks: if neurological deficit is combined early surgery is allowed; Over 18 years; Visual analogue pain score over 5; Compatible findings in MRI and/or CT 2. Lumbar spinal stenosis without instability, Low back pain over 3 months: if neurological deficit is combined early surgery is allowed; Over 18 years; Visual analogue pain score over 5; Compatible findings in MRI and/or CT; Without instability (15 degrees and 4mm motion) 3. Lumbar spinal stenosis with instability, Low back pain over 3 months: if neurological deficit is combined early surgery is allowed; Over 18 years; Visual analogue pain score over 5; Compatible findings in MRI and/or CT; With instability (15 degrees and 4mm motion) 4. No surgical indication, Low back pain over 6 weeks: if neurological deficit is combined early surgery is allowed; Over 18 years; Visual analogue pain score over 5; Compatible findings in MRI and/or CT; Exclusion Criteria: 1. Herniated intervertebral disease, Cauda equine syndrome; Instability (15degrees, 4mm motion); Fracture, pregnancy; Any comorbidities that preclude operation; Combined disease: Neuromuscular disease, parkinson's disease, inflammatory arthritis, symptomatic spinal tumor, myelopathy, spinal infection; Previous lumbar spinal surgery; Neurological deficit that necessitates surgery 2. Lumbar spinal stenosis without instability, Cauda equine syndrome; Instability (15degrees, 4mm motion); Fracture, pregnancy Any comorbidities that preclude operation; Combined disease: Neuromuscular disease, parkinson's disease, inflammatory arthritis, symptomatic spinal tumor, myelopathy, spinal infection; Previous lumbar spinal surgery; Neurological deficit that necessitates surgery 3. Lumbar spinal stenosis with instability, Cauda equine syndrome; Fracture, pregnancy; Any comorbidities that preclude operation; Combined disease: Neuromuscular disease, parkinson's disease, inflammatory arthritis, symptomatic spinal tumor, myelopathy, spinal infection Previous lumbar spinal surgery; Neurological deficit that necessitates surgery 4. No surgical indication, Cauda equine syndrome; Fracture, pregnancy; Combined disease: Neuromuscular disease, parkinson's disease, inflammatory arthritis, symptomatic spinal tumor, myelopathy, spinal infection; Neurological deficit that necessitates surgery