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Table 1 Selection criteria for trial eligibility

From: Prolonged conservative treatment or 'early' surgery in sciatica caused by a lumbar disc herniation: rationale and design of a randomized trial [ISRCT 26872154]

Inclusion criteria:
   • Age 18–65 yr.
   • Persistent radicular pain in the L4, L5 or S1 dermatome with or without mild neurological deficit
   • Severe disabling leg pain of 6–12 weeks duration
   • Evidence of a unilateral disc herniation confirmed on MRI
   • Sufficient knowledge of Dutch language
   • Informed consent
Exclusion criteria:
   • Cauda equina syndrome or severe paresis (MRC<3)
   • Complaints of a lumbosacral radicular syndrome in the same dermatome within the past 12 months
   • A history of unilateral disc surgery on the same level
   • Spinal canal stenosis
   • Degenerative or lytic spondylolisthesis
   • Pregnancy
   • "Severe life-threatening" or psychiatric illness
   • Planned (e)migration to another country in the year after randomization