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. 2017 Mar 6;12(3):e0173033. doi: 10.1371/journal.pone.0173033

Table 1. Characteristics of the study population.

Boys Girls P-value
N (%) 455 (45.5) 546 (54.5)
Age (years, median−range) 10.9 (3.0−18.3) 10.8 (3.2−18.0) 0.58
BMI SDS (median−range) 2.85 (1.26−8.96) 2.48 (1.08−4.41) <0.001
Overweight* (n, %) 20 (4.4) 34 (6.2) 0.26
Obese** (n, %) 435 (95.6) 512 (93.8)
WC (cm, median−range) 86.8 (58.0−143.0) 85.0 (54.0−134.5) 0.16
HC (cm, median−range) 92.0 (48.5−148.0) 92.0 (54.0−141.0) 0.40
Tanner stage (median−range) 2 (1−5) 3 (1−5) <0.001
Pre-pubertal (n, %) 112 (36.5) 98 (21.0) <0.001
Pubertal or post-pubertal (n, %) 195 (63.5) 368 (79.0)
Socioeconomic status (median−range) 3 (1−5) 3 (1−5) 0.18
High (n, %) 272 (67.5) 318 (64.0) 0.30
Low (n, %) 131 (32.5) 179 (36.0)
Region of residence
Region Zealand (n, %) 205 (45.1) 251 (46.0) 0.32
Region Mid Jutland (n, %) 104 (22.9) 119 (21.8)
Region South Jutland (n, %) 146 (32.1) 176 (32.2)

Data is presented as medians with ranges or as numbers and percentages.

BMI, body mass index; SDS, standard deviation score; N, number; WC, waist circumference; HC, hip circumference.

* Overweight: 85th−94th percentile.

** Obese: ≥95th percentile. Continuous variables were compared in boys and girls using the Wilcoxon signed rank test. Categorical variables were compared using the Chi-squared test.