Table 3

Internal responsiveness of the NCOS to the clinical intervention (surgery)*
Preoperative Postoperative P**
Mean (SD) Mean (SD)
1. How far can you walk before having to stop and rest? 1.4 (0.4) 4.1 (0.5) < 0.0001
2. How long can you stand still before having to sit down? 1.3 (0.2) 4.3 (0.7) < 0.0001
3.Once your symptoms arise, you have:(back pain, leg pain, numbness/tingling, heaviness/weakness) 5.7 (1.4) 15.4 (2.6) < 0.0001
4.The symptoms affect the following activities (sports or activities, household or odd jobs, walking, standing, sitting, sex life) 8.6 (4.1) 24.2 (2.4) < 0.0001
5.How long must you rest before the symptoms resolve 1.6 (0.9) 4.6 (0.8) < 0.0001
6.How frequently do you take pain medicine for these symptoms? 2.1 (0.5) 4.6 (0.4) < 0.0001
7.How frequently do you see a doctor for these symptoms? 2.3 (0.8) 4.3 (0.9) < 0.0001
8.Rank your pain on the VAS scale 3.9 (2) 8.2 (1.1) < 0.0001
Total 26.9 (12.7) 69.7 (16.8) < 0.0001

Scoring: The score is calculated by adding: ‘a’ answers = 0 points, ‘b’ answers = 2 points, ‘c’ answers = 4 points, ‘d’ answers = 6 points plus the pain scale added as 10-X.

Total possible points = 100 (asymptomatic, full function).

* Higher scores indicate better conditions.

** Derived from paired samples t-test.

Azimi et al.

Azimi et al. BMC Neurology 2012 12:101   doi:10.1186/1471-2377-12-101

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