Fig. 1

The changes in the prevalence of obesity in a randomized sample of Czech adolescents aged 11–15 years between 2002 and 2018. N Number, SES Socioeconomic status, *chi-square tests differences (p < .05) in the prevalence of obesity between 2002 and 2018, †chi-square tests differences (p < .05) in the prevalence of obesity between low- and high-SES categories of boys and girls separately in 2018