Table 3. Model-Estimated Obesity Prevalence and Weight-Estimated Obesity Prevalence, Students in Kindergarten, Grade 1, Grade 3, Grade 5, and Grade 7, by District, Alaska, School Year 2013–2014.
| School District | Weighted Estimate, % (95% CI)a | Jackknife Modelsb |
|
|---|---|---|---|
| Modeled Estimate % (95% CI) | School-Level Variance Partitioning Coefficientc | ||
| Anchorage part A | 18.6 (16.4–21.0) | 17.9 (17.0–18.7) | 0.0153 |
| Anchorage part B | 17.1 (15.0–19.3) | 17.6 (16.8–18.4) | 0.0179 |
| Matanuska–Susitna Borough | 14.0 (12.3–15.8) | 14.3 (13.3–15.3) | 0.0151 |
| Kenai Peninsula Borough | 16.5 (14.7–18.5) | 12.4 (11.1–13.7) | 0.0125 |
| Kodiak Island Borough | 15.0 (9.5–22.9) | 21.1 (18.4–23.8) | 0.0129 |
| Ketchikan Gateway Borough | 21.4 (17.7–25.5) | 19.9 (16.9–22.9) | 0.0129 |
| North Slope Borough | 31.8 (19.1–47.9) | 35.2 (30.9–39.5) | 0.0130 |
| Alaska Gateway | 25.8 (22.4–29.6) | 29.6 (19.8–39.5) | 0.0145 |
| Petersburg City | 17.5 (16.4–18.7) | 17.5 (11.6–23.5) | 0.0146 |
Abbreviation: CI, confidence interval.
a
Measured obesity prevalence weighted up to district enrollment totals by sex, race/ethnicity, and grade.
b
Logistic regression models predicting the prevalence of student obesity based only on data from school districts other than the 8 districts participating in this study and variables representing student-level sex, race/ethnicity, and grade and school-level race/ethnicity distribution, socioeconomic status, and random effects.
c
Variance partitioning coefficients for each model were computed by dividing level-2 variance by the sum of level-2 variance and π2/3 (23).