TABLE 5.
Correlations between change in PROMs and GRC in the lumbar decompression cohort
| Preop to 6 wks | Preop to 12 wks | Preop to 6 mos | Preop to 1 yr | 6 wks to 12 wks | 12 wks to 6 mos | 6 mos to 1yr | |
|---|---|---|---|---|---|---|---|
| ODI |
|
|
|
|
|
|
|
| Correlation coefficient |
0.433 |
0.492 |
0.486 |
0.473 |
0.288 |
0.301 |
NS |
| Strength of correlation |
Moderate |
Moderate |
Moderate |
Moderate |
Weak |
Weak |
NS |
| p value |
<0.001
|
<0.001
|
<0.001
|
<0.001
|
<0.001
|
<0.001
|
0.012 |
| VAS back |
|
|
|
|
|
|
|
| Correlation coefficient |
0.269 |
0.359 |
0.373 |
0.306 |
0.266 |
0.272 |
0.180 |
| Strength of correlation |
Weak |
Weak |
Weak |
Weak |
Weak |
Weak |
Very weak |
| p value |
<0.001
|
<0.001
|
<0.001
|
<0.001
|
<0.001
|
<0.001
|
0.001
|
| VAS leg |
|
|
|
|
|
|
|
| Correlation coefficient |
0.318 |
0.428 |
0.380 |
0.361 |
0.193 |
0.201 |
NS |
| Strength of correlation |
Weak |
Moderate |
Weak |
Weak |
Very weak |
Weak |
NS |
| p value |
<0.001
|
<0.001
|
<0.001
|
<0.001
|
<0.001
|
<0.001
|
0.056 |
| SF-12 PCS |
|
|
|
|
|
|
|
| Correlation coefficient |
−0.338 |
−0.440 |
−0.489 |
−0.489 |
−0.246 |
−0.274 |
NS |
| Strength of correlation |
Weak |
Moderate |
Moderate |
Moderate |
Weak |
Weak |
NS |
| p value |
<0.001
|
<0.001
|
<0.001
|
<0.001
|
<0.001
|
<0.001
|
0.006 |
| SF-12 MCS |
|
|
|
|
|
|
|
| Correlation coefficient |
−0.269 |
−0.226 |
−0.226 |
−0.201 |
NS |
NS |
NS |
| Strength of correlation |
Weak |
Weak |
Weak |
Weak |
NS |
NS |
NS |
| p value |
<0.001
|
<0.001
|
<0.001
|
<0.001
|
0.194 |
0.043 |
0.523 |
| PROMIS |
|
|
|
|
|
|
|
| Correlation coefficient |
−0.423 |
−0.499 |
−0.524 |
−0.556 |
−0.188 |
−0.258 |
−0.188 |
| Strength of correlation |
Moderate |
Moderate |
Moderate |
Moderate |
Very weak |
Weak |
Very weak |
| p value | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 |
Boldface type indicates statistical significance (p < 0.0012).