School-based surveillance on visit-to-visit blood pressure variability and high blood pressure in children and adolescents

Table 4 Reclassification and predictive potential value of VVV for childhood HBP

HBP	C-statistics		Continuous NRI, %		IDI, %
HBP	Estimate (95% Cl)	P value	Estimate	P value	Estimate	P value
Model 3	0.803 (0.798–0.805)		Reference		Reference
Model 3 + SBP-SD^a	0.847 (0.842–0.853)	< 0.0001	65.57%	< 0.0001	4.71%	< 0.0001
Model 3 + SBP-ARV^a	0.848 (0.843–0.853)	< 0.0001	62.69%	< 0.0001	5.59%	0.003
Model 3 + DBP-SD^a	0.822 (0.818–0.826)	< 0.0001	38.02%	< 0.0001	1.51%	< 0.0001
Model 3 + DBP-ARV^a	0.822 (0.818–0.826)	< 0.0001	37.56%	< 0.0001	1.86%	0.003

Model 3 included age and BMI in 2018, sex, SES, region, mean SBP and DBP z-scores during 2012–2017, and BP measurement times
HBP, high blood pressure; DBP, diastolic blood pressure; SBP, systolic blood pressure; SD, standard deviation; ARV, actual real variability; CV, coefficient of variation; NRI, net reclassification index; IDI, integrated discrimination improvement
^aBP variability parameters were calculated based on BP z-scores during 2012–2017

ISSN: 1471-2261