Table 2.
Between-group analyses of EMG activity in deep multifidus muscle.
| cLBP | healthy control | t-value | P-value | |
|---|---|---|---|---|
| AEMG | 426.94 ± 146.41 | 771.44 ± 149.04 | 8.24 | <0.001 |
| RMS | 267.79 ± 88.10 | 339.34 ± 71.72 | 3.16 | 0.003 |
| MF | 187.71 ± 29.67 | 169.13 ± 26.30 | −2.27 | 0.024 |
| MPF | 200.00 ± 26.20 | 184.63 ± 22.51 | −2.16 | 0.032 |
| MFs | 0.06 ± 0.06 | 0.17 ± 0.13 | 3.55 | 0.001 |
| MPFs | 0.05 ± 0.05 | 0.14 ± 0.10 | 3.58 | 0.001 |
cLBP, chronic low back pain; AEMG, average EMG; RMS, root mean square; MF, median frequency; MPF, mean power frequency; MFs, median frequency slope; MPFs, mean power frequency slope.