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Volume 6: No. 1, January 2009
ORIGINAL RESEARCH
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Grade Level | BMI (kg/m2) Before Summer Recess (May 2007) | BMI (kg/m2) After Summer Recess (August 2007) | P Value |
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3 (n = 15) | 21.1 | 21.6 | .01 |
4 (n = 23) | 22.7 | 23.2 | .07 |
5 (n = 14) | 25.0 | 25.8 | .02 |
7 (n = 15) | 23.0 | 23.2 | .26 |
Figure 1. Body mass index (BMI, kg/m2) before and after summer recess in third-, fourth-, fifth-, and seventh-grade girls, Wind River Indian Reservation, Wyoming, 2007.
Grade Level | BMI (kg/m2) Before Summer Recess (May 2007) | BMI (kg/m2) After Summer Recess (August 2007) | P Value |
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3 (n = 14) | 20.1 | 20.3 | .37 |
4 (n = 33) | 23.2 | 24.1 | <.001 |
5 (n = 13) | 23.8 | 23.8 | .48 |
7 (n = 13) | 23.5 | 23.5 | .45 |
Figure 2. Body mass index (BMI, kg/m2) before and after summer recess in third-, fourth-, fifth-, and seventh-grade boys, Wind River Indian Reservation, Wyoming, 2007.
Category | BMI (kg/m2) Before Summer Recess (May 2007) | BMI (kg/m2) After Summer Recess (August 2007) | P Value |
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≥85th Percentile girls (n = 37) | 26.8 | 27.4 | <.001 |
Normal-weight girls (n = 24) | 17.6 | 17.9 | .09 |
≥85th Percentile boys (n = 46) | 26.1 | 26.8 | .002 |
Normal-weight boys (n = 25) | 17.2 | 17.1 | .79 |
≥85th Percentile boys and girls (n = 83) | 26.4
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27.1 | <.001 |
Normal-weight boys and girls (n = 49) | 17.4 | 17.5 | .42 |
Figure 3. Age- and sex-adjusted body mass index (BMI, kg/m2) before and after summer recess in third-, fourth-, fifth-, and seventh-grade students, Wind River Indian Reservation, Wyoming, 2007, Wind River Indian Reservation, Wyoming, 2007.
Category | BMI (kg/m2) z Score Before Summer Recess (May 2007) | BMI (kg/m2) z Score After Summer Recess (August 2007) | P Value |
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≥85th Percentile girls (n = 37) | 2.0 | 2.1 | .79 |
Normal-weight girls (n = 24) | 0.39 | 0.43 | .76 |
≥85th Percentile boys (n = 46) | 2.0 | 2.0 | .95 |
Normal-weight boys (n = 25) | 0.24 | 0.14 | .14 |
≥85th Percentile boys and girls (n = 83) | 2.0 | 2.0 | .87 |
Normal-weight boys and girls (n = 49) | 0.31 | 0.28 | .72 |
Figure 4. Body mass index (BMI, kg/m2) z score before and after summer recess in third-, fourth-, fifth-, and seventh-grade students, Wind River Indian Reservation, Wyoming, 2007.
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