Table 2.
Pain improvement and pain intensity (N = 422)
| Amount of pain improvement a, number of patients (%)
|
Pre-operative
|
Post-operative
|
Pre- to postoperative difference
|
|---|---|---|---|
| none | - | 47 (11%) | - |
| a little | 7 (2%) | 52 (12%) | - |
| moderate amount | 40 (9%) | 67 (16%) | - |
| a lot | 185 (44%) | 187 (44%) | - |
| complete | 190 (45%) | 69 (17%) | - |
|
Pain intensity
b, mean (95% CI)
|
|||
| back | 6.1 (5.8, 6.4) | 2.9 (2.6, 3.2) | 3.2 (2.8, 3.6) |
| leg | 5.2 (4.9, 5.5) | 1.7 (1.4, 2.0) | 3.5 (3.1, 3.9) |
| Changed by minimum clinically important difference, % | |||
| based on threshold points c | - | - | 248 (59%) |
| based on threshold percent d | - | - | 190 (45%) |
a
improvement expected (preoperative) and improvement received (postoperative)
b
numerical rating 0 (none) to 10 (worst)
c
back pain decrease by ≥ 2 points, no increase in points for leg pain
d
back pain decrease by 30%, no increase in percent for leg pain