FIGURE 1.

The frequency distribution of BMI in boys aged 8 according to the WHO and IOTF references. The vertical lines mark the overweight cut‐offs WHO +1 and IOTF 25, while the shaded areas indicate the corresponding overweight prevalence (grey where they overlap). The four points mark where the cut‐offs cross the distributions, with filled circles for the reference and open circles for the opposite reference. The inset shows the four points as BMI z‐scores according to the two references, along with open triangles for z‐scores corresponding to observed overweight prevalence in the target group of boys aged 8 ¹⁶