 - Fulfilment of International Society for the Study of Lumbar Spine clinical diagnosis criteria for lumbar spinal stenosis with the presence of at least 6 out of the 7 following criteria: pain in the buttocks or legs while walking; flex forward to relieve symptoms; feel relief when using a shopping cart or bicycle; motor or sensory disturbance while walking; normal and symmetric foot pulses; lower extremity weakness; and low back pain 