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

Table 5 Subgroups

Subgroups	Variables
Demographics	age < 70 years versus > 70 years
	women versus men
Anamnestic and neurological variables	short versus long history of back pain
	more leg pain versus more back pain
Radiological variables	soft versus bony stenosis
	extent of stenosis during MRI examination

ISSN: 1471-2474