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Table 1 Descriptive characteristics of the samples, HBSC study, Czech Republic 2002–2018

From: Time-trends and correlates of obesity in Czech adolescents in relation to family socioeconomic status over a 16-year study period (2002–2018)

 2002 2006 2010 2014 2018† 
 BoysGirlsBoysGirlsBoysGirlsBoysGirlsBoysGirls
n=(2345)(2567)(2332)(2297)(2008)(2113)(2183)(2405)(5856)(5773)
 %%%%%%%%%%
Age category§
 11 years34.133.131.431.232.630.629.930.332.732.8
 13 years32.533.833.533.931.435.233.934.434.534.4
 15 years33.433.135.134.936.034.236.235.332.832.8
SES
 Low34.240.525.730.313.117.032.434.423.727.2
 Medium56.553.054.955.954.253.344.345.445.344.6
 High9.36.519.413.832.729.723.320.231.028.2
Weight status*
 Non-overweight81.691.777.983.873.788.174.887.973.384.7
  95% CI80.0–83.290.6–92.776.2–79.682.3–85.371.8–75.786.7–89.573.0–76.686.6–89.272.1–74.483.8–85.7
 Overweight14.56.514.211.818.79.518.19.317.911.9
  95% CI13.1–16.05.6–7.412.8–15.610.5–13.117.0–20.48.3–10.716.5–19.78.2–10.516.9–19.011.0–12.7
 Obesity3.91.87.94.47.62.47.12.88.83.4
  95% CI3.1–4.71.3–2.36.8–9.03.6–5.36.4–8.81.7–3.16.0–8.22.1–3.58.1–9.62.9–3.9
  1. §11 years (13 years and 15 years) includes adolescents in the age range 10.5–12.49 years (12.50–14.49 years and 14.50–16.49 years); † in the 2018 data analyses, the weights for strata (administrative regions) were applied; SES socioeconomic status; *obesity and overweight were represented by the >97th percentile and 85th–97th percentile, respectively, on gender-specific Body Mass Index-for-age growth charts [30, 31]; CI 95% confidence interval