Regression analyses of EUS motoneuron properties on afterhyperpolarization (AHP) half-decay time and resting membrane potential (RMP)
| Percentage of Dependent Variable Variance Accounted for by Independent Variable(s) | |||||||
|---|---|---|---|---|---|---|---|
| Test Design | Independent Variables That Account for Variance in Dependent Variable | Input Resistance | Depolarization Threshold | Rheobase | ΔI | Recruitment Current | Derecruitment Current |
| One-factor | AHP half-decay time | 20.8** | 40.6*** | 43.5*** | 21.8* | 45.6*** | 47.2*** |
| RMP | 12.7* | 28.7** | 35.4** | 2.1 | 61.8*** | 60.2*** | |
| Two-factor | All factors | 22.2* | 45.9** | 65.0*** | 22.8* | 77.0*** | 77.0*** |
| AHP half-decay time (unique) | 9.9 | 17.3* | 29.7** | 21.4* | 16.8** | 18.6** | |
| RMP (unique) | 2.8 | 9.0 | 22.8** | 0.3 | 33.6*** | 31.6*** | |
| AHP half-decay time and RMP (common) | 9.5 | 19.6 | 12.5 | 1.1 | 26.6 | 26.8 | |
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Regressions of input resistance, depolarization threshold (voltage excursion from RMP to reach the action potential threshold), rheobase (current threshold for action potential initiation during 40-ms depolarizing pulse), ΔI (ramp decrecruitment − recruitment current), ramp recruitment current, and ramp derecuitment current on AHP half-decay time and/or RMP determine the variance they account for in the dependent variables. The two-factor analyses show the percentage of the dependent variable variance accounted for by the variation in: all factors together (All factors), the unique contribution of each independent variable (unique), and the variance that is common among independent variable (common; calculated as the difference between the variance accounted for by the entire model and the sum of the unique contributions of the independent variables individually).
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↵* P < 0.05,
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↵** P < 0.01, and
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↵*** P < 0.001, variance accounted for by variable(s) significantly different from zero.