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. 2008 Jan 24;9:9. doi: 10.1186/1471-2474-9-9

Table 1.

The duration of physical activity at baseline and at follow-up

Cases Controls
Organized physical activity (hours/week)
Baseline before intervention
 Outside the school 0.7 ± 1.2 1.3 ± 1.6
Baseline after intervention
 School curriculum 3.3 1.0 **
 Outside the school 0.7 ± 1.2 1.3 ± 1.6
 Total physical activity 4.0 ± 1.2 2.3 ± 1.6 **
Follow-up
 School curriculum 3.3 1.0 **
 Outside the school 1.1 ± 1.3 1.9 ± 1.9 *
 Total physical activity 4.4 ± 1.3 2.9 ± 1.9 **

Data presented as mean ± SD. *P < 0.05, **P < 0.001