Table 6.

Regression equations for pulse wave velocity vs. age (top) and mean blood pressure (bottom) according to blood pressure category (top) and age category (bottom) in the reference value population (11 092 subjects)

	PWV ∼ age + age2	R2
BP category
Optimal	PWV = 0.000 × age + 0.83 × 10−3 × age2 + 5.55	0.46
Normal	PWV = 0.000 × age + 0.99 × 10−3 × age2 + 5.69	0.47
High normal	PWV = 0.000 × age + 1.05 × 10−3 × age2 + 5.91	0.41
Grade I HT	PWV = 0.000 × age + 1.18 × 10−3 × age2 + 6.17	0.39
Grade II/III HT	PWV = 0.044 × age + 0.85 × 10−3 × age2 + 5.73	0.31
	PWV ∼ MBP	R2
Age category (years)
<30	PWV = 0.0472 × MBP + 2.20	0.26
30–39	PWV = 0.0423 × MBP + 2.20	0.13
40–49	PWV = 0.0646 × MBP + 1.41	0.23
50–59	PWV = 0.0731 × MBP + 1.35	0.17
60–69	PWV = 0.0715 × MBP + 3.16	0.13
≥70	PWV = 0.0676 × MBP + 5.46	0.07

Linear coefficient for age marked 0.00 means <10e–10. All R² are highly significant (P < 0.001).