Table 1

Characteristics of the study sample according to weight status, at the first visit

Overweight childrenNon-overweight childrenp Value
Total n (%)969 (69)438 (31)
Gender (boys) n (%)475 (49)214 (49)1.0
Age (median, range)11.2 (4.08–17.10)11.9 (4.09–17.0)0.4
Age group n (%)0.07
 4–7 years172 (18)104 (24)
 8–11 years346 (36)147 (34)
 12–14 years376 (39)158 (36)
 15–17 years75 (7.7)29 (6.6)
Ethnicity n (%)
 Western594 (61)
 Non-Western300 (31)
 Unknown75 (7.7)
Weight
 BMI (kg/m²)24.4 (4.1)18.1 (2.4)<0.001
 BMI-SDS2.1 (0.7)0.1 (1.1)<0.001
 Overweight n (%)604 (62)
 Obesity n (%)288 (30)
 Morbid obesity n (%)77 (7.9)
BP (first visit)
 Mean systolic BP-SDS0.91 (0.97)0.46 (0.88)<0.001
 Mean diastolic BP-SDS0.34 (0.75)0.13 (0.71)<0.001
 ≥P90<P95 n (%)91 (9.4)24 (5.5)<0.001
 ≥P95 n (%)120 (12.4)20 (4.6)<0.001
  • BP, blood pressure; BMI, body mass index; SDS, SD scores.