Table 2.

Correlations between the changes in blood pressure variables and hemodynamic variables

Changes in hemodynamic variables	Changes in blood pressure variables
	Systolic blood pressure			Diastolic blood pressure
	r	95% CI	P-value	r	95% CI	P-value
Sit-up test
Heart rate	0.026	−0.433 to 0.475	0.916	0.181	−0.298 to 0.587	0.459
Stroke volume	0.176	−0.303 to 0.583	0.472	−0.033	−0.480 to 0.428	0.894
Cardiac output	0.274	−0.206 to 0.647	0.426	0.150	−0.327 to 0.566	0.540
Total peripheral resistance	0.484	0.038–0.769	0.036	0.594	0.191–0.826	0.007
Head-up tilt test
Heart rate	−0.324	−0.678 to 0.153	0.177	−0.168	−0.578 to 0.310	0.491
Stroke volume	0.085	−0.384 to 0.519	0.731	−0.047	−0.491 to 0.416	0.848
Cardiac output	−0.109	−0.537 to 0.363	0.657	−0.146	−0.563 to 0.330	0.551
Total peripheral resistance	0.546	0.122–0.802	0.016	0.619	0.229–0.838	0.005

P-values marked in bold indicate a significant main effect and a significant interaction.

CI, confidence interval; r, Pearson’s product-moment correlation coefficient.