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Table 4 Magnitude of nocturnal BP dipping correlates with vascular function and subclinical atherosclerosis

From: Nocturnal blood pressure dipping as a marker of endothelial function and subclinical atherosclerosis in pediatric-onset systemic lupus erythematosus

Measure

N

% SBP Dip

% DBP Dip

SBP load

DBP load

r

p value

r

p value

ρ

p value

ρ

p value

Aortic stiffness

 PWV SDS

18

0.3

0.29

− 0.1

0.76

0.3

0.28

0.0

0.87

 Augmentation index

18

0.3

0.30

0.3

0.31

0.6

0.01

0.7

< 0.01

Endothelial function

 lnRHI

16

0.2

0.49

0.5

0.04

− 0.2

0.50

− 0.2

0.44

Wall thickening

 CCA-IMT

18

− 0.5

0.06

− 0.2

0.49

− 0.1

0.62

− 0.3

0.27

 Mean cIMT

14

− 0.6

0.03

− 0.1

0.72

− 0.2

0.51

− 0.1

0.79

  1. Pearson’s correlation coefficients (r) estimating the relationship between the percent dip in nocturnal BP and measures of vascular function and subclinical atherosclerosis; Spearman rank correlations (ρ) were used to assess associations with 24-h BP load
  2. SBP systolic blood pressure, DBP diastolic blood pressure, PWV SDS pulse wave velocity standard deviation score for age and sex, lnRHI reactive hyperemia index, CCA-IMT mean common carotid intima-media thickness, Mean cIMT mean of IMT measurements over 6 carotid sites