[Factors determining the results of surgical treatment of backache syndromes in the lumbar spine].
The therapeutic results were analysed in a group of 509 patients operated on for low back pain syndromes (after previous establishing of indications based on clinical examination and radiological investigations) with over 6 months of follow-up. The therapeutic results were compared with the observed symptoms and signs, neurological findings, age, duration of acute phase of the disease, surgical approach used, changes found during the operation, stability of the spine and type of its surgical immobilization. The therapeutic result depended mainly on the degree of neurological abnormalities before the operation, duration of the acute phase and operative findings as well as spinal stability. The operative approach and stabilization type, although influencing the result, were a consequence of the above factors.