| |
SPEEDY 1 (2007)
|
SPEEDY 3 (2011)
|
|---|
|
Sex (%)
| | |
|
Male
|
47.7
|
-
|
|
Female
|
52.3
|
-
|
|
Age (years, mean(SD))
|
10.24 (.32)
|
14.32 (.30)
|
|
Ethnicity (%)
| | |
|
White
|
97
|
-
|
|
Other
|
3
|
-
|
|
BMI (mean(SD))
|
18.05 (3.15)
|
20.95 (4.01)
|
|
Family SES (%)
| | |
|
Low
|
18.3
|
-
|
|
Middle
|
39.1
|
-
|
|
High
|
42.6
|
-
|
|
Physical activity
|
School day
|
Lunchtime
|
School day
|
Lunchtime
|
|
(n = 321)
|
(n = 321)
|
(n = 315)
|
(n = 325)
|
|
No. of valid days per participant (mean(SD))
|
4.3 (0.8)
|
4.7 (0.7)
|
4.2 (0.9)
|
4.3 (0.9)
|
|
Proportion of wear-time (%)
|
|
SED
|
71
|
53
|
77
|
64
|
|
Light PA
|
21
|
29
|
16
|
23
|
|
MVPA
|
8
|
18
|
7
|
13
|
|
Time spent (minutes, mean(SD))
| | | | |
|
SED
|
272.90 (25.54)
|
31.27 (7.00)
|
300.16 (29.87)
|
31.07 (9.59)
|
|
LPA
|
80.65 (16.31)
|
17.00 (3.50)
|
64.65 (18.87)
|
11.33 (4.60)
|
|
MVPA
|
30.76 (10.76)
|
10.55 (4.92)
|
27.43 (13.70)
|
6.49 (4.66)
|
- SD, standard deviation; SED, sedentary behaviour; MVPA, moderate to vigorous intensity physical activity. Valid days were defined as days in which wear time ≥80 % of the duration of lunchtime and/or school day
