Table 3.

Longitudinal relation of fourth Korotoff phase and fifth Korotoff phase levels among children to adult blood pressure levels^a

Category	Category	No.	Adult DBPb		Adult SBP
			Child K4	Child K5	Child K4	Child K5
Overall	—	1,848	0.22*	0.17*	0.17*	0.08*
Sex	Boys	811	0.23	0.19	0.19*	0.12*
	Girls	1,037	0.26*	0.20*	0.22*	0.11*
Race	White	1,315	0.23*	0.17*	0.19*	0.07*
	Black	533	0.19	0.16	0.14	0.09
Childhood age, y	<12	732	0.26*	0.18*	0.17*	0.07*
	12–13.9	502	0.18	0.13	0.17*	0.05*
	≥14	614	0.21*	0.19	0.15	0.08
Adult age, y	25–29	574	0.29	0.26	0.19*	0.10*
	30–39	645	0.22*	0.15*	0.16*	0.05*
	40–51	629	0.18	0.14	0.17*	0.09*

Abbreviations: DBP, diastolic blood pressure; SBP, systolic blood pressure.

^aAnalysis is restricted to the 1,848 of the 2,156 adults who did not report using antihypertensive medications. Values are correlation coefficients between child and adult levels of specified blood pressure z scores. Childhood fourth Korotoff phase (K4) and fifth Korotoff phase (K5) measurements represent the mean of the 3 measurements from the first observer averaged over all examinations.

^bK5 was used as the adult DBP.

*P < 0.01 for difference in the correlation between K4 and K5.