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Table 2 Characteristics of the study participants according to BP level

From: Association between obesity and high blood pressure among Lithuanian adolescents: a cross-sectional study

Variables Normotensive Prehypertensive Hypertensive p
(n = 4,847) (n = 955) (n = 1,655)
n % n % n %  
Sex:        
 Boys 1,952 55.9 524 15.0 1,018 29.1 <0.001* ^
 Girls 2,895 73.1 431 10.8 637 16.1  
Age (years):        
 12–13 2,823 72.7 322 8.3 737 19.0 <0.001* ^
 14–15 2,024 56.6 633 17.7 918 25.7  
BMI categories:        
 Normal weight 4,409 69.2 759 11.9 1,204 18.9 <0.001* ^
 Overweight 384 42.4 159 17.6 362 40.0  
 Obesity 54 30.0 37 20.6 89 49.4  
WC percentile categories:        
 <75th 4,601 67.8 831 12.2 1,355 20.0 <0.001* ^
 75th– < 90th 205 38.5 102 19.2 225 42.3  
 ≥90th 41 29.7 22 15.9 75 54.4  
Age (years) 13.0 (12.0–14.0) 14 (13.0–15.0)a 14.0 (13.0–15.0)a,b <0.001#
Weight (kg) 50.0 (42.0–56.0) 58.0 (52.0–66.0)a 59.0 (52.0–68.0)a <0.001#
Height (cm) 162.0 (156.0–168.0) 170.0 (164.0–176.0)a 168.0 (161.5–175)a,b <0.001#
BMI (kg/m2) 18.5 (16.9–20.2) 20.1 (18.4–22.1)a 20.7 (18.9–22.9)a,b <0.001#
WC (cm) 64.0 (61.0–69.0) 68.0 (64.0–73.0)a 70.0 (65.0–75.0)a,b <0.001#
SBP (mmHg) 111.0 (105.3–115.0) 124.3 (122.0–127.3)a 138.0 (132.7–144.3)a,b <0.001#
DBP (mmHg) 63.1 ± 6.4 67.1 ± 6.9a 71.7 ± 8.1a,b <0.001#
  1. BP – blood pressure, BMI – body mass index, WC – waist circumference, SBP – systolic blood pressure, DBP – diastolic blood pressure, SD – standard deviation.
  2. Values are presented as mean ± SD or median (25th–75th percentiles).
  3. aSignificantly different (p < 0.05) from normotensive participants.
  4. bSignificantly different (p < 0.05) from prehypertensive participants.
  5. *Significant difference using chi-square (χ 2) test.
  6. ^Significant difference using Cochran-Armitage trend test.
  7. #Significant difference between three groups.