Trajectories of Objectively Measured Physical Activity among Secondary Students in Canada in the Context of a Province-Wide Physical Education Policy: A Longitudinal Analysis
Table 1
Baseline characteristics across grade cohorts, total study sample, and baseline physical activity.
Baseline student characteristics
Grade 9 ()
Grade 10 ()
Total ()
Baseline physical activity ()
%
%
%
mean
SD
Age (years), mean ± SD
14.8
±0.705
15.9
±0.419
15.2
±0.818
N.A.
Gender
Male
142
(48.0)
62
(41.1)
204
(45.6)
64.6
±23.3
Female
151
(51.0)
88
(58.3)
239
(53.5)
53.0
±23.0
BMI category
Overweight or obese
40
(13.5)
21
(13.9)
61
(13.6)
58.2
±23.8
Healthy weight
143
(48.3)
85
(56.3)
228
(51.0)
58.0
±23.5
Missing
109
(36.8)
45
(29.8)
154
(34.5)
58.6
±24.9
Baseline physical activity level
Low
103
(34.8)
46
(30.5)
149
(33.3)
32.8
±8.4
Moderate
89
(30.1)
60
(39.7)
149
(33.3)
56.4
±6.4
High
104
(35.1)
45
(29.8)
149
(33.3)
85.8
±14.2
Baseline school neighbourhood characteristics
School location
Rural
73
(24.7)
60
(39.7)
133
(29.8)
48.8
±19.6
Urban
223
(75.3)
91
(60.3)
314
(70.2)
62.4
±24.5
Socioeconomic status
Low
204
(68.9)
104
(68.9)
308
(68.9)
55.3
±22.9
High
92
(31.1)
47
(31.1)
139
(31.1)
65.0
±24.9
Proportions may not add up to 100% due to missing values. N.A.: not applicable.
