Out of 790 outpatients with sciatica seen during 1973 and 1977, 156 cases underwent surgery at out clinic. 265 cases of the remaining 634 could be followed up over 1 year ith an average of 2 years and 7 months after the first examination:
1) Fifty-two cases (19.6%) had been treated surgically at other hospitals.
2) Signs and symptoms of the remaining non-operative 213 cases were remarkably improved in 107 cases (50.2%), improved in 79 cases (37.1%), unimproved 27 cases (12.9%).
