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Table 4 Covariates for subanalysis

From: The Felix-trial. Double-blind randomization of interspinous implant or bony decompression for treatment of spinal stenosis related intermittent neurogenic claudication

N Covariates for subanalysis
1 Age and age banding ( < 60 years, > 60 years or similar linked to groups size after recruitment)
2 Long medical history of back pain
3 Leg pain intensity
4 Proportion leg pain/back pain
5 Extent of stenosis during MRI examination
6 Kind of stenosis (soft or bony)
7 Sexe
8 Surface area of spinal canal
  1. N, number of covariate (alphabetically ordered)