TABLE 2.

Correlations between blood pressure variables, pulse pressure variables and pulse rate

	PP	elPP	stPP	DBP	SBP	MAP
elPP	0.785
stPP	0.560	−0.075
DBP	0.189	0.174	0.071
SBP	0.808	0.650	0.431	0.731
MAP	0.505	0.419	0.253	0.943	0.912
PR	−0.207	−0.084	−0.222	0.154	−0.051	0.065

Data were determined using 24-h ambulatory measurements for the whole population (N = 11 848). The relationship between two variables, as evaluated by Pearson correlation coefficient r, is considered very weak for r = 0.00–0.19; weak for r = 0.20–0.39; moderate for 0.40–0.59; strong for r = 0.60–0.79; and very strong for r = 0.80–1.0 (Evans JD, 1996. Straightforward Statistics for the Behavioral Sciences. Brooks/Cole Publishing, Pacific Grove). PP, pulse pressure; elPP, elastic PP; stPP, stiffening PP; MAP, mean arterial pressure (equals DBP + PP/3); PR; pulse rate.