Research Article
School-Based Obesity Prevention Intervention in Chilean Children: Effective in Controlling, but not Reducing Obesity
Table 5
Change in characteristics of PE classes conducted by teachers in control and intervention schools*.
| | | Control children | Intervention children |
| | Period of observation of PE classes of children 1st–3rd grades | May–July
2012 | Aug.–Oct.
2012 | May–July
2012 | Aug.–Oct.
2012 | | Number of PE classes observed at least 4 times each semester | 12 | 12 | 18 | 18 | Actual duration of
PE classes (median minutes) | 61.4 | 64.8 | 58.8 | 67.9 | | Four curricular aspects related to the way the teacher conducts the class (median score of a total of 16 points) | 9.9 | 10 | 10.1 | 14.31 | | Number of children wearing pedometers in 4 PE classes each semester | 155 | 155 | 482 | 482 | Moderate/vigorous activity (MVA)a in PE classes:
mean minutes (SD) | 13.8 (5.6) | 10.2 (5.6)2 | 15.6 (5.3) | 16.1 (5.0) | % Class time in MVA
(calculated from real duration) | 24.5 | 16.22 | 24.8 | 23.7 |
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All PE classes had a programmed duration of 90 minutes; amoderate and vigorous activity.
1P = 0.033; 2P = 0.000.
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