Forty-seven patients with lumbar canal stenosis operated were examined by questionaire. Their follow-up period ranged from 5 to 12 years with an average of 8.8 years. The excellent and good results were obtained in 77% of the cases. The results appeared to be correlated with their age, evaluation points, activities of daily living, sensory disturbance, muscle power loss, preoperative ambulatory distance and their follow-up period.
