Table 4.

Determinant of morning blood pressure surge

	Hypertensive Subjects		Normotensive Subjects
	β	P	β	P
Multiple r2	0.58		0.42
cfPWV, mmHg	0.458	<0.001	−0.342	0.152
The lowest nocturnal SBP, mmHg	Excluded variable		−0.275	0.270
Morning SBP, mmHg	−0.047	0.834	Excluded variable
Dip of night HR, beats/min	−0.290	0.040	0.181	0.482
Morning HR increase, beats/min	0.093	0.660	−0.590	0.088
Total activity, U/min	0.036	0.799	−0.163	0.540
Sympathetic BRS, bursts · 100 beats−1 · mmHg−1	0.332	0.023	0.198	0.467
Cardiovagal BRS phase IV, ms/mmHg	0.057	0.668	−0.508	0.075

cfPWV, carotid-to-femoral pulse wave velocity; BRS, baroreflex sensitivity.