Age (yrs) | WHtR<20th Percentile(A) | 20th ≤ WHtR<40th Percentile(B) | 40th ≤ WHtR<60th Percentile(C) | 60th ≤ WHtR<80th Percentile(D) | WHtR ≥ 80th Percentile(E) | F-value | Cohen’s d# | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
N | Mean(SD) | N | Mean(SD) | N | Mean(SD) | N | Mean(SD) | N | Mean(SD) | ||||||||||||
Boys | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | A/B | A/C | A/D | A/E | B/C | B/D | B/E | C/D | C/E | D/E |
7–9 yrs | 800 | 47.23 ± 2.81 | 633 | 47.68 ± 2.59 | 903 | 47.77 ± 2.47 | 1178 | 47.33 ± 2.29 | 1516 | 46.89 ± 2.24 | 22.88※ | 0.17 | 0.20a | 0.04 | 0.13 | 0.04 | 0.14 | 0.33a | 0.18 | 0.37a | 0.19 |
10–12 yrs | 775 | 44.72 ± 3.62 | 785 | 45.15 ± 3.62 | 797 | 45.21 ± 3.44 | 1065 | 44.83 ± 3.32 | 1492 | 43.46 ± 3.15 | 54.44※ | 0.12 | 0.14 | 0.03 | 0.37a | 0.02 | 0.09 | 0.50b | 0.11 | 0.53b | 0.42a |
13–15 yrs | 1045 | 43.67 ± 5.18 | 1037 | 44.33 ± 4.99 | 961 | 44.34 ± 5.25 | 860 | 44.00 ± 4.95 | 858 | 42.55 ± 4.76 | 19.33※ | 0.13 | 0.13 | 0.07 | 0.23a | 0.00 | 0.07 | 0.37a | 0.07 | 0.36a | 0.30a |
16–18 yrs | 731 | 40.50 ± 5.72 | 908 | 41.56 ± 6.10 | 955 | 41.57 ± 6.19 | 1005 | 40.64 ± 6.16 | 821 | 39.27 ± 5.19 | 22.21※ | 0.18 | 0.18 | 0.02 | 0.23a | 0.00 | 0.15 | 0.40a | 0.15 | 0.40a | 0.24a |
Girls | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
7–9 yrs | 855 | 47.02 ± 2.62 | 794 | 47.36 ± 2.32 | 984 | 47.29 ± 2.31 | 1080 | 46.86 ± 2.18 | 948 | 46.74 ± 2.05 | 12.59※ | 0.14 | 0.11 | 0.07 | 0.12 | 0.03 | 0.22 | 0.28a | 0.19 | 0.25a | 0.06 |
10–12 yrs | 871 | 44.15 ± 3.27 | 922 | 44.00 ± 2.91 | 887 | 43.92 ± 2.97 | 895 | 43.61 ± 2.85 | 740 | 42.91 ± 2.82 | 21.81※ | 0.05 | 0.07 | 0.18 | 0.41a | 0.03 | 0.14 | 0.38a | 0.11 | 0.35a | 0.25a |
13–15 yrs | 1066 | 40.61 ± 3.98 | 1022 | 40.65 ± 3.89 | 964 | 40.37 ± 3.75 | 804 | 40.31 ± 4.15 | 506 | 39.84 ± 4.10 | 4.36 | 0.01 | 0.06 | 0.07 | 0.19 | 0.07 | 0.08 | 0.20a | 0.02 | 0.13 | 0.11 |
16–18 yrs | 1000 | 35.64 ± 3.89 | 1147 | 35.72 ± 4.15 | 1055 | 35.48 ± 3.99 | 892 | 35.12 ± 3.74 | 524 | 34.35 ± 3.76 | 13.28※ | 0.02 | 0.04 | 0.14 | 0.34a | 0.06 | 0.15 | 0.35a | 0.09 | 0.29a | 0.21a |
Total | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
7–9 yrs | 1655 | 47.12 ± 2.71 | 1427 | 47.50 ± 2.45 | 1887 | 47.52 ± 2.40 | 2258 | 47.11 ± 2.25 | 2464 | 46.83 ± 2.17 | 30.06※ | 0.15 | 0.16 | 0.00 | 0.12 | 0.01 | 0.17 | 0.29a | 0.18 | 0.30a | 0.13 |
10–12 yrs | 1646 | 44.42 ± 3.45 | 1707 | 44.53 ± 3.30 | 1684 | 44.53 ± 3.26 | 1960 | 44.27 ± 3.17 | 2232 | 43.28 ± 3.05 | 55.82※ | 0.03 | 0.03 | 0.05 | 0.35a | 0.00 | 0.08 | 0.39a | 0.08 | 0.40a | 0.32a |
13–15 yrs | 2111 | 42.13 ± 4.86 | 2059 | 42.50 ± 4.84 | 1925 | 42.35 ± 4.98 | 1664 | 42.22 ± 4.94 | 1364 | 41.55 ± 4.71 | 8.69※ | 0.08 | 0.04 | 0.02 | 0.12 | 0.03 | 0.06 | 0.20a | 0.03 | 0.17 | 0.14 |
16–18 yrs | 1731 | 37.69 ± 5.32 | 2055 | 38.30 ± 5.87 | 2010 | 38.38 ± 5.99 | 1897 | 38.05 ± 5.86 | 1345 | 37.35 ± 5.26 | 9.27※ | 0.11 | 0.12 | 0.06 | 0.06 | 0.01 | 0.04 | 0.17 | 0.06 | 0.18 | 0.13 |