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Table 1 Characteristics of the 730 participating girls

From: Elevated blood pressure in adolescent girls: correlation to body size and composition

  All participants (n = 730) BP < 90th percentile (n = 690) BP ≥90th percentile (n = 40) p*
Age (years) 12.1 (0.7) 12.1 (0.7) 12.2 (0.8) 0.44
Puberty stage 3.2 (1.0) 3.2 (0.9) 3.2 (1.0) 0.81
Race = AAa 91 % 91 % 95 % 0.34
HR (min-1) 81.8 (9.9) 81.6 (9.9) 85.0 (8.8) 0.03
Weight (kg) 57.1 (16.9) 56.6 (16.6) 65.6 (19.9) 0.008
Height (cm) 155.4 (7.4) 155.4 (7.4) 155.5 (7.4) 0.97
BMI 23.5 (6.0) 23.3 (5.9) 27.0 (7.2) 0.0001
BMI z-score 1.00 (1.04) 0.97 (1.03) 1.5 (1.03) 0.003
BMI ≥ 85th percentile 51 % 49 % 73 % 0.007
Waist circumference (cm) 77.7 (14.2) 77.2 (14.0) 85.7 (15.8) 0.002
Waist/height ratio 0.500 (0.087) 0.497 (0.085) 0.551 (0.100) 0.002
Fat Mass (kg) 18.4 (11.2) 18.1 (11.1) 24.3 (12.6) 0.04
Body surface area (m2) 1.54 (0.22) 1.54 (0.22) 1.64 (0.23) 0.01
Fat-free mass (kg) 38.7 (6.3) 38.5 (6.2) 41.4 (7.8) 0.006
Body fat (%) 29.7 (9.9) 29.4 (9.9) 34.6 (9.4) 0.002
  1. Values are mean ± SD or percentages. *Difference between BP < 90th percentile and BP ≥ 90th percentile determined by t-test or X 2 test.aAA, African American