Table 1. Participant characteristics by grade.
|
Grade |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 & 12 |
| Demographics, mean (± SD) |
Age (years) |
7.4 (1.5) |
8.2 (1.7) |
9.1 (1.4) |
10.1 (.9) |
10.7 (1.0) |
11.7 (.9) |
11.8 (2.0) |
13.8 (1.2) |
14.7 (.4) |
16.0 (.3) |
17.0 (1.7) |
| Height (m) |
1.27 (.09) |
1.32 (.10) |
1.37 (.10) |
1.42 (.09) |
1.45 (.09) |
1.51 (.10) |
1.54 (.14) |
1.62 (.11) |
1.64 (.14) |
1.63 (.29) |
1.67 (.16) |
| Body Mass (kg) |
24.2 (4.7) |
27.5 (5.7) |
31.4 (6.6) |
36.9 (8.6) |
39.5 (11.3) |
44.9 (10.5) |
52.0 (11.2) |
56.7 (11.5) |
59.2 (10.7) |
61.7 (14.6) |
62.6 (10.5) |
| Boys |
27 |
47 |
40 |
42 |
63 |
71 |
35 |
17 |
17 |
17 |
24 |
| Ethnic group, n |
Black |
13 |
16 |
15 |
13 |
13 |
11 |
11 |
5 |
9 |
10 |
12 |
| White |
40 |
63 |
61 |
52 |
68 |
74 |
43 |
7 |
11 |
21 |
24 |
| Indian |
22 |
26 |
19 |
22 |
22 |
19 |
8 |
6 |
10 |
10 |
11 |
| BMI distribution, n |
Underweight (BMI ≤5th %ile)* |
5 |
6 |
3 |
6 |
7 |
3 |
1 |
1 |
0 |
2 |
2 |
| Normal (BMI >5th-<85th %ile) |
51 |
82 |
79 |
63 |
76 |
80 |
47 |
11 |
22 |
27 |
42 |
| Overweight (BMI≥ 85th %ile) |
10 |
11 |
8 |
13 |
13 |
12 |
8 |
5 |
5 |
6 |
2 |
| Obese (≥ 95th %ile) |
9 |
6 |
5 |
5 |
7 |
9 |
6 |
1 |
3 |
6 |
1 |
* Terminology based on the study of Barlow et al. ().
