Lumbar spinal stenosis.
D000328:Adult; D000368:Aged; D001416:Back Pain / Q000209:etiology; D003250:Constriction; D005500:Follow-Up Studies; D005684:Gait; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D009192:Myelography; D011187:Posture; D013115:Spinal Canal; D013122:Spinal Diseases / Q000601:surgery; D013128:Spinal Osteophytosis / Q000175:diagnosis; D013997:Time Factors