Skip to main content

Table 1 Descriptive characteristics of the study samplea at three ages

From: Tracking of overweight and obesity from early childhood to adolescence in a population-based cohort – the Tromsø Study, Fit Futures

Age (years) Gender Age (years)
Mean (SD)
Height (cm)
Mean (SD)
Weight (kg)
Mean (SD)
BMI (kg/m2)
Mean (SD)
BMI SDSb
Mean (SD)
2–4 Boys 2.6 (0.23) 93.0 (3.91)** 14.1 (1.63)** 16.33 (1.35) 0.01 (1.01)
Girls 2.6 (0.20) 91.3 (3.50)** 13.5 (1.57)** 16.19 (1.38) 0.08 (1.00)
5–7 Boys 6.0 (0.36) 117.8 (5.09)** 22.0 (3.56)** 15.77 (1.77) 0.14 (0.94)
Girls 6.0 (0.38) 116.1 (5.03)** 21.6 (4.02)** 15.96 (2.10) 0.32 (1.06)
15–17 Boys 16.0 (0.39) 177.0 (6.64)** 69.5 (14.75)** 22.13 (4.29) 0.49 (1.12)
Girls 16.1 (0.37) 165.1 (6.35)** 60.6 (11.82)** 22.22 (4.14) 0.40 (1.03)
  1. aA sub study of The Tromsø Study: Fit Futures N = 532: 279 boys, 253 girls
  2. ** Statistically significant gender differences (Mann–Whitney U test p <0.001)
  3. Statistically significant gender difference (Mann–Whitney U test p = 0.03)
  4. bBMI SDS is calculated using LMS values based on an international reference population of children [28]
  5. BMI body mass index, SDS standard deviation score, SD ± standard deviation, LMS LMS curves/ LMS method: median (M), coefficient of variation (S) and skewness (L)