Sense of coherence and outcome of anterior low-back fusion. A 5- to 13-year follow-up of 85 patients.

Eighty-five patients were followed up for more than 5 years after an anterior low-back fusion which was performed for a chronically painful low-back condition. The mean age of the patients at the time of the index operation was 35 years, the mean duration of their symptoms was 8 years, and 50 (59%) had undergone previous low-back surgery. Preoperatively the patients were on average severely disabled according to the Oswestry scale, and the self-rated improvement at the follow-up on average 7.4 years after surgery was significant, the mean index being 24%. In 29 (34%) patients, the Oswestry index was 10% or below, reflecting none or very little discomfort as a result of the surgery. In all age groups, women had better results than men. The best outcome was found in patients with no previous low-back surgery. Half of the patients returned to work. Thirteen patients needed new surgery because of nonunion. The use of transpedicular fixation did not produce better results. The sense of coherence scale assessing the patient's successful coping capability had a very good predictive value in the whole series, and this predictive value was especially good in patients between 35 and 50 years of age. Also, the shorter duration of symptoms was an important predictor of a successful outcome, and the end results in patients who had a longer duration of preoperative low-back symptoms tended to be poor.