Assessment with Oswestry disability index in surgically treated patients with lumbar spondylolisthesis: experience in 96 patients.

OBJECTIVE: To assess the outcome of surgical treatment in spondylolisthesis of lumbosacral region using Oswestry disability Index.

METHODS: The quasi-experimental study was conducted at the Combined Military Hospital, Rawalpindi from 2006 to 2013 and comprised surgically treated patients with spondylolisthesis. The patients with degenerative and isthmic types with follow-up of at least two years were included. A performa was designed for each patient and records were kept in a custom-built database. Oswestry disability index was used as the assessment tool and assessment was done pre-operatively, at 1, 3 and 6 months and then at 1 year and 2 years.

RESULTS: There were 96 patients with mean pre-op Oswestry disability index score of 81.06% (range 42.22-100, SD ±11.99). L5-S1 was affected in 44 (45.83%) patients, L4-L5 in 30 (31.25%), L4-5-S1 in 7 (7.29%) and multi or high level was found in the rest of the cases. One level was involved in 77 (80.2%), 2 in 11 (11.45%), 3 in 7 (7.29%) and 4 in 1 (1.04%). The slip grade as per Meyerding grades was 1 in 31 (32.29%), II in 39 (40.62%), III in 19 (19.79%), IV in 5 (5.2%) and 2 (2.08%) had spondyloptosis. Mean follow-up was 42 months (range 24-63). Mean Oswestry disability score at 1 month was 38.51% (range 11- 62.22%, SD ±11.75); at 6 months 10.02% (range 0-40%, SD ±6.99); at 1 year 4.62% (range 0-24%, SD ±5.36) and at 2 years 4.21% (range 0-15%, SD ±4.2).

CONCLUSIONS: Surgical treatment of spondylolisthesis gives excellent long-term result in most patients.