Table 3.
Summary of linear regression analysis for motor unit parameters
| Sex a | Level b | |||||
|---|---|---|---|---|---|---|
| Beta | 95% CI | P‐value | Beta | 95% CI | P‐value | |
| MUFR, Hz | 0.81 | 0.09 to 1.54 | 0.032 | 0.33 | 0.14 to 0.53 | 0.001 |
| MUFR variability, % | 0.63 | −0.08 to 1.33 | 0.085 | 0.40 | 0.001 to 0.81 | 0.049 |
| MUP phases | 0.08 | −0.27 to 0.44 | 0.647 | 0.27 | 0.13 to 0.41 | <0.001 |
| MUP duration, ms | 0.08 | −1.01 to 1.17 | 0.890 | 0.65 | 0.37 to 0.93 | <0.001 |
| MUP area, μV.ms | −148.08 | −332.53 to 36.38 | 0.121 | 269.78 | 208.00 to 331.56 | <0.001 |
| NF jiggle, % | 1.13 | −1.72 to 3.98 | 0.440 | 2.26 | 0.69 to 3.84 | 0.005 |
Beta value and 95% confidence interval (CI) represent the model‐predicted change per unit between sexes and contraction levels. Values in bold reflect statistically significant (P < 0.05) results.
FR, firing rate; MU, motor unit; MUP, motor unit potential; NFM, near fibre motor unit potential.
a
Multiple mixed‐effects linear regression model with sex as the dependent variable.
b
Multiple mixed‐effects linear regression model with contraction level as the dependent variable.