Table 4.
Simple correlations between time to task failure and factors entered into the linear regression analyses.
| Measures | Healthy | Low back pain | ||
| r | P value | r | P value | |
| Trunk mass | −0.467 | .02 | −0.532 | .01 |
| Trunk length | 0.180 | .40 | 0.016 | .94 |
| Vertical trunk force | 0.065 | .76 | −0.061 | .78 |
| Trunk moment | −0.248 | .24 | −0.200 | .35 |
| Hip force | −0.056 | .80 | −0.299 | .16 |
| Erector spinae MPFa slope | 0.616 | .001 | 0.314 | .14 |
| Gluteus maximus MPF slope | 0.440 | .03 | −0.174 | .42 |
| Biceps femoris MPF slope | 0.513 | .01 | 0.418 | .04 |
| Self-efficacy | 0.525 | .01 | 0.235 | .27 |
| Depression | 0.128 | .55 | −0.194 | .36 |
| Pain catastrophizing | −0.158 | .46 | −0.091 | .67 |
| Pain resilience | −0.030 | .89 | −0.362 | .08 |
| Kinesiophobia | −0.106 | .62 | −0.276 | .19 |
aMPF: median power frequency.