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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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