Table 5.

Areas under the receiver operator characteristic curve for the classification of adult hypertension by childhood blood pressure levels

Childhood blood pressure predictora	Overall	Boys	Girls
SBP	0.63	0.66	0.61
K4 (reference)	0.63	0.63	0.63
K5b	0.57**	0.59*	0.57**
K5 values of 0mm Hg replaced by K4 value	0.59**	0.60	0.59*
K5 values <20mm Hg replaced by K4 value	0.59**	0.61	0.59*
K5 values of 0mm Hg deleted from calculation of mean K5c	0.59**	0.60	0.58*

Abbreviations: K4, fourth Korotoff phase; K5, fifth Korotoff phase; SBP, systolic blood pressure.

^aAll childhood levels were expressed as z scores that accounted for sex, age, and height. Childhood measurements represent the mean of the 3 measurements from the first observer.

^bIndividuals measurements of 0mm Hg were included in the calculation of the mean.

^cSix children were excluded because the 3 K5 measurements were recorded as 0mm Hg.

*P for the difference between the area under the curve for K4 (reference) and the area under the curve for SBP or K5 < 0.05; *P for the difference between the area under the curve for K4 (reference) and the area under the curve for SBP or K5 < 0.001.