Fig. 2.

Forest plots for the prevalence rates of overweight and obesity in children and adolescents based on BMI_sr (left) and BMI_m (right). The study-specific prevalence rate and 95 % CI are represented by the black square and horizontal line, respectively; the centre of the diamond represents the pooled prevalence rate and its width represents the pooled 95 % CI (BMI_sr, BMI derived from self-reported height and weight; BMI_m, BMI derived from measured height and weight; P _sr, prevalence rate based on BMI_sr; P _m, prevalence rate based on BMI_m)