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Table 1 Characteristics of the study population according to the BP level

From: Renin-angiotensin system gene polymorphisms and high blood pressure in Lithuanian children and adolescents

Characteristics

HBP (n = 274)

NBP (n = 435)

P value

Age, years, mean (SD)

13.30 (1.13)

13.26 (1.15)

0.647

SBP, mm Hg, mean (SD)

137.03 (10.89)

110.94 (7.35)

<0.001

DBP, mm Hg, mean (SD)

70.17 (8.20)

62.25 (6.59)

<0.001

BMI, kg/m2, mean (SD)

21.31 (3.54)

18.68 (2.81)

<0.001

WC, cm, mean (SD)

72.27 (9.05)

64.58 (6.89)

<0.001

Weight, kg, mean (SD)

58.71 (12.41)

49.26 (10.77)

<0.001

Height, cm, mean (SD)

165.48 (8.82)

161.67 (9.65)

<0.001

Sex, n (%)

 Boys

169 (47.9)

184 (52.1)

<0.001

 Girls

105 (29.5)

251 (70.5)

 

Age, years, n (%)

 12–13

156 (36.9)

267 (63.1)

0.240

 14–15

118 (41.3)

168 (58.7)

 

BMI categories, n (%)

 Normal weight

195 (33.0)

396 (67.0)

<0.001

 Overweight

58 (62.4)

35 (37.6)

 

 Obesity

21 (84.0)

4 (16.0)

 

WC percentile categories, n (%)

  < 75th

204 (33.2)

411 (66.8)

<0.001

 75th–<90th

48 (69.6)

21 (30.4)

 

  ≥ 90th

21 (87.5)

3 (12.5)

 
  1. The means were compared using the t test
  2. Categorical variables were compared using the chi-square (χ2) test
  3. Abbreviations: NBP normal blood pressure, HBP high blood pressure, SBP systolic blood pressure, DBP diastolic blood pressure, BMI body mass index, WC waist circumference, SD standard deviation