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Emerging Infectious Diseases Journal
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Volume 6: No. 1, January 2009

ORIGINAL RESEARCH
Prevalence of Overweight and Influence of Out-of-School Seasonal Periods on Body Mass Index Among American Indian Schoolchildren

Grade Level BMI (kg/m2) Before Summer Recess (May 2007) BMI (kg/m2) After Summer Recess (August 2007) P Value
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.

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Grade Level BMI (kg/m2) Before Summer Recess (May 2007) BMI (kg/m2) After Summer Recess (August 2007) P Value
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.

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Category BMI (kg/m2) Before Summer Recess (May 2007) BMI (kg/m2) After Summer Recess (August 2007) P Value
≥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

 

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.

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Category BMI (kg/m2) z Score Before Summer Recess (May 2007) BMI (kg/m2) z Score After Summer Recess (August 2007) P Value
≥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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The findings and conclusions in this report are those of the authors and do not necessarily represent the official position of the Centers for Disease Control and Prevention.


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