Table 4 Trends in age-standardized prevalence (95 % confidence intervals) of childhood overweight according to household income and urbanity among South Korean boys and girls aged 10–19

Boys

Girls

IOTF criteria

20.4 (18.3–22.5)

25.6 (22.9–28.3)

0.0027

IOTF criteria

15.0 (13.1–17.0)

16.7 (14.3–19.1)

0.3184

 Low

16.4 (13.0–19.7)

23.7 (19.3–28.1)

0.0145

0.9315

 Low

18.7 (14.9–22.6)

19.8 (15.7–23.9)

0.6558

0.9977

 Middle

21.7 (18.0–25.3)

24.4 (19.9–28.9)

0.4186

 Middle

13.5 (10.4–16.6)

15.8 (11.5–20.1)

0.6519

 High

22.2 (18.5–25.9)

29.4 (24.7–34.1)

0.0208

 High

13.3 (10.3–16.2)

13.9 (9.9–17.9)

0.8108

 P-value for trend***

0.0263

0.0701

 P-value for trend***

0.0434

0.0355

Urbanity

Urbanity

 Rural

15.9 (12.1–19.7)

20.1 (14.5–25.8)

0.2276

0.7877

 Rural

14.4 (10.9–17.9)

21.7 (14.6–28.8)

0.1915

0.2495

 Urban

21.4 (19.0–23.8)

26.7 (23.8–29.6)

0.0061

 Urban

15.1 (12.9–17.3)

16.3 (13.7–18.9)

0.6156

 P-value****

0.0186

0.0743

 P-value****

0.7173

0.3666

KCDC 2007

15.2 (13.3–17.2)

18.5 (16.1–20.9)

0.0514

KCDC 2007

16.9 (14.9–18.9)

18.2 (15.7–20.8)

0.4672

 Low

13.7 (10.6–16.9)

17.4 (13.4–21.4)

0.2613

0.4813

 Low

21.4 (17.5–25.4)

20.9 (16.7–25.1)

0.9034

0.6819

 Middle

14.8 (11.6–18.0)

15.6 (11.7–19.5)

0.7925

 Middle

15.9 (12.6–19.2)

18.3 (13.6–22.9)

0.6741

 High

16.7 (13.3–20.1)

22.9 (18.5–27.3)

0.0345

 High

13.8 (10.7–16.8)

14.9 (10.8–19.0)

0.6374

 P-value for trend***

0.2927

0.0687

 P-value for trend***

0.005

0.0493

Urbanity

Urbanity

 Rural

12.1 (8.6–15.6)

13.8 (8.7–18.8)

0.6597

0.5495

 Rural

17.5 (13.6–21.3)

24.5 (17.3–31.7)

0.301

0.3593

 Urban

15.9 (13.7–18.1)

19.4 (16.7–22.0)

0.0571

 Urban

16.8 (14.5–19.0)

17.6 (14.9–20.3)

0.7501

 P-value****

0.0619

0.0673

 P-value****

0.7772

0.2463