Document Classification

Section Type: RESULTS

Text: DS patients undergoing surgery were much more likely to be fused than SPS patients (94 % vs. 11 %, P < 0. 001) and improved more with surgery than SPS patients on all primary outcome measures (DS vs. SPS) : physical function (+30. 4 vs. +25. 3, P = 0. 004 at 1 year ; + 28. 3 vs. +21. 4, P < 0. 001 at 2 years), bodily pain (+32. 3 vs. +27. 5, P = 0. 006 at 1 year ; +31. 1 vs. +26. 1, P = 0. 003 at 2 years), and Oswestry Disability Index (-25. 9 vs. -21. 0, P < 0. 001 at 1 year ; -24. 7 vs. -20. 2, P < 0. 001 at 2 years).