Recruitment was so slow, that it made the study impossible. Organizational changes made it impossible for recruiting centers to continue recruitment

The main purpose of this study is to determine the measurement characteristics of WHODAS-II (World Health Organization Disability Assessment Schedule II), as well as to analyze its correlation with symptomatic lumbar spinal stenosis (Visual Analog Scale, VAS), disability (Spanish version of the Roland Morris Questionnaire, RMQ), fear avoidance beliefs and attitudes (Spanish version of the FAB Questionnaire, FABQ), and quality of life (SF-12). Measurements will be taken at baseline and 6 days later (day 7).

Inclusion Criteria:

• Patients seen for symptomatic lumbar spinal stenosis
• With signs of neurogenous claudication
• MRI or CAT scan concordant with observed signs
• Able to read and write
• Have signed the informed consent form

Exclusion Criteria:

• Central nervous system pathology (with or without treatment)
• Diagnosis of rheumatic inflammatory disease or fibromyalgia
• Red flags for underlying systemic disease
• Criteria for diagnosis of disc herniation
• Symptoms suggesting saddle anesthesia, cauda equina, loss of sphincter tone or paraparesis
• Motor deficit that progresses or does not improve in 6 weeks

Patients seen at Hospital Universitario Marqués de Valdecilla in Santander, Spain - for symptomatic lumbar spinal stenosis.