Table 3.
Correlations between hemodynamic variables and respiratory sympathetic modulation
| Correlation | Correlation Coefficient | P Value |
|---|---|---|
| Resting SBP vs. %ΔMSNA burst incidence | ||
| All participants | ρ = 0.584 | <0.0005 |
| YF only | r = 0.407 | 0.189 |
| YM only | ρ = 0.140 | 0.665 |
| PMF only | ρ = 0.577 | 0.039 |
| Resting DBP vs. %ΔMSNA burst incidence | ||
| All participants | ρ = 0.365 | 0.026 |
| YF only | r = 0.348 | 0.268 |
| YM only | ρ = 0.189 | 0.557 |
| PMF only | ρ = 0.692 | 0.009 |
| Resting MAP vs. %ΔMSNA burst incidence | ||
| All participants | ρ = 0.521 | 0.001 |
| YF only | r = 0.398 | 0.200 |
| YM only | ρ = 0.266 | 0.404 |
| PMF only | ρ = 0.714 | 0.006 |
| Resting MSNA burst incidence vs. %ΔMSNA burst incidence | ||
| All participants | ρ = 0.520 | 0.001 |
| YF only | ρ = −0.182 | 0.572 |
| YM only | ρ = 0.014 | 0.966 |
| PMF only | ρ = 0.286 | 0.344 |
n = 37 for correlations with all participants: n = 12 premenopausal females (YF); n = 12 younger males (YM); n = 13 postmenopausal females (PMF). SBP, systolic blood pressure; DBP, diastolic blood pressure; MAP, mean arterial pressure; MSNA, muscle sympathetic nerve activity; %Δ, percent change; ρ, Spearman’s rank correlation coefficient; r, Pearson’s correlation coefficient.