Table 1.
Characteristics of participants and health behaviours at baseline and follow up by gender and by cohort
| |
Grade 2 cohort |
Grade 4 cohort |
Grade 7 cohort |
|||
|---|---|---|---|---|---|---|
| Baseline N = 307 | Follow-up N = 299 | Baseline N = 300 | Follow-up N = 294 | Baseline N = 206 | Follow-up N = 202 | |
|
Girls |
N = 151 |
N = 148 |
N = 157 |
N = 155 |
N = 98 |
N = 97 |
| Age (years ± SE) |
8.74 ± 0.03 |
10.74 ± 0.03 |
10.81 ± 0.03 |
12.81 ± 0.03 |
13.90 ± 0.03 |
15.90 ± 0.03 |
| Parental education high (%) |
- |
69.6 |
- |
65.0 |
- |
56.1 |
| Eats breakfast every school day (%) |
96.6 |
98.4 |
91.7 |
89.1 |
84.5 |
67.5 |
| Eats lunch every school day (%) |
96.5 |
91.3 |
87.2 |
76.6 |
65.6 |
73.5 |
| Eats vegetables at least twice a day (%) |
44.4 |
40.0 |
35.7 |
24.8 |
28.9 |
32.5 |
| Eats fruit at least twice a day (%) |
34.0 |
22.2 |
24.8 |
15.9 |
12.4 |
16.9 |
| Eats sweets at most twice a week (%) |
81.4 |
78.4 |
76.1 |
82.4 |
73.2 |
74.7 |
| Drinks sweetened drinks at most twice a week (%) |
84.1 |
81.8 |
81.9 |
77.5 |
86.6 |
78.3 |
| Watches TV at most three hours every school day (%) |
100.0 |
95.2 |
98.0 |
92.8 |
94.9 |
89.2 |
| Is member of a club (%) |
85.5 |
84.1 |
85.9 |
80.4 |
78.1 |
62.7 |
| Participates in sports at least three times a week (%) |
31.9 |
54.4 |
50.3 |
57.3 |
56.7 |
51.2 |
| Spends at least 30 minutes outdoors every school day (%) |
93.1 |
76.2 |
89.0 |
81.0 |
79.8 |
65.1 |
| Walks or bikes to school at least three days a week (%) |
64.8 |
78.6 |
77.1 |
70.4 |
72.6 |
60.5 |
| Is physically active during breaks at least 3 days a week (%) |
70.6 |
54.0 |
71.3 |
20.4 |
14.6 |
3.6 |
| Obese (%) |
3.3 |
0.7 |
3.2 |
1.9 |
3.1 |
1.0 |
| Overweight/obese (%) |
15.9 |
14.6 |
18.5 |
12.1 |
14.3 |
12.2 |
| BMIsds (mean ± SE) |
0.27 ± 0.09 |
0.07 ± 0.10 |
0.30 ± 0.08 |
0.33 ± 0.08 |
0.22 ± 0.12 |
0.19 ± 0.10 |
|
Boys |
N = 156 |
N = 151 |
N = 143 |
N = 139 |
N = 108 |
N = 105 |
| Age (years ± SE) |
8.77 ± 0.02 |
10.77 ± 0.02 |
10.80 ± 0.02 |
12.80 ± 0.02 |
13.91 ± 0.03 |
15.91 ± 0.03 |
| Parental education high (%) |
- |
65.5 |
- |
62.0 |
- |
60.2 |
| Eats breakfast every school day (%) |
97.4 |
95.6 |
94.3 |
86.9 |
86.8 |
75.0 |
| Eats lunch every school day (%) |
97.4 |
85.3 |
88.7 |
82.0 |
63.2 |
76.1 |
| Eats vegetables at least twice a day (%) |
31.1 |
25.2 |
36.9 |
18.0 |
21.7 |
20.5 |
| Eats fruit at least twice a day (%) |
29.1 |
14.1 |
23.9 |
11.5 |
14.2 |
9.3 |
| Eats sweets at most twice a week (%) |
79.3 |
83.2 |
78.2 |
80.3 |
74.5 |
69.3 |
| Drinks sweetened drinks at most twice a week (%) |
81.3 |
79.4 |
72.5 |
70.5 |
58.5 |
48.9 |
| Watches TV at most three hours every school day (%) |
100.0 |
97.1 |
98.6 |
95.0 |
92.3 |
87.5 |
| Is member of a club (%) |
86.7 |
82.5 |
90.9 |
76.9 |
77.4 |
65.9 |
| Participates in sports at least three times a week (%) |
56.7 |
66.4 |
69.7 |
64.5 |
78.1 |
62.5 |
| Spends at least 30 minutes outdoors every school day (%) |
92.7 |
86.8 |
89.7 |
76.0 |
83.0 |
78.4 |
| Walks or bikes to school at least three days a week (%) |
54.7 |
76.7 |
83.6 |
61.0 |
78.3 |
56.3 |
| Is physically active during recess at least 3 days a week (%) |
80.3 |
81.6 |
86.4 |
40.5 |
48.1 |
19.5 |
| Obese (%) |
2.6 |
5.1 |
4.9 |
5.6 |
1.9 |
1.9 |
| Overweight/obese (%) |
20.5 |
18.6 |
20.3 |
18.2 |
18.5 |
15.7 |
| BMIsds (mean ± SE) | 0.53 ± 0.10 | 0.61 ± 0.11 | 0.55 ± 0.10 | 0.41 ± 0.10 | 0.33 ± 0.10 | 0.27 ± 0.10 |