Rationale: Minimally invasive techniques have gained popularity to decompress lumbar spinal stenosis in the elderly. However, high quality evidence based on randomised controlled trials are not available. Objective: To investigate whether small size interarcuair decompression is more effective than conventional laminectomy in patients with intermittent neurogenic claudication caused by lumbar spinal stenosis. Study design: Double-blinded multi-centre randomised controlled trial Study population: In total 236 patients are to be included. The inclusion criteria are: subjects \> 40 years of age with at least 12 weeks of complaints of intermittent neurogenic claudication based on MRI confirmed of LSS, with sufficient knowledge of the Dutch language. Intervention: Small size interarcuair decompression versus conventional laminectomy. Main study parameters/endpoints: Primary outcome is the Modified Roland Morris Questionnaire. Secondary outcomes are leg pain, back pain and a 6 minute walk test amongst others. Nature and extent of the burden and risks associated with participation: based on available literature , it is believed that the risks associated with small size interarcuair decompression are no greater than that associated with a laminectomy, although these will be examined.
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Change on the Modified Roland-Morris Disability Questionnaire
Timeframe: baseline, 3 weeks, 6 weeks, 12 weeks, 6 months, 12 months, 18 months, 24 months, 36 months and 48 months after surgery