Table 3.
Binomial Regression Risk Ratios (95% Confidence Intervals) for Body Mass Index Categoriesa With Independent Variables of Race, Sex, and Age in Study of American Indian and White Elementary School Students in Oklahoma, 2005-2009
| Very Obese Compared With Healthy Weight or Underweight | |||||
|---|---|---|---|---|---|
| Independent variable | 2005 (n = 608) | 2006 (n = 563) | 2007 (n = 508) | 2008 (n = 535) | 2009 (n = 573) |
|
| |||||
| Race | |||||
| American Indian | 2.05 (1.45-2.91) | 1.59 (1.16-2.18) | 2.34 (1.56-3.52) | 2.16 (1.46-3.21) | 2.31 (1.50-3.56) |
| White | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] |
| Sex | |||||
| Boys | 1.11 (0.88-1.39) | 1.18 (0.93-1.48) | 1.26 (0.98-1.6) | 1.14 (0.91-1.43) | 1.14 (0.90-1.45) |
| Girls | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] |
| Age | 1.12 (1.05-1.19) | 1.07 (1.01-1.14) | 1.05 (0.98-1.12) | 1.08 (1.02-1.15) | 1.11 (1.04-1.19) |
|
| |||||
| Obese Compared With Healthy Weight or Underweight | |||||
|
| |||||
| Independent variable | 2005 (n = 471) | 2006 (n = 433) | 2007 (n = 400) | 2008 (n = 396) | 2009 (n = 396) |
|
| |||||
| Race | |||||
| American Indian | 2.52 (1.22-5.19) | 1.73 (0.93-3.21) | 1.73 (0.95-3.13) | 1.25 (0.66-2.36) | 1.25 (0.68-2.29) |
| White | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] |
| Sex | |||||
| Boys | 1.12 (0.68-1.85) | 1.04 (0.65-1.67) | 0.86 (0.54-1.38) | 1.23 (0.72-2.13) | 1.22 (0.74-2.01) |
| Girls | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] |
| Age | 1.13 (0.99-1.29) | 1.04 (0.91-1.19) | 1.13 (0.99-1.28) | 1.19 (1.03-1.37) | 1.12 (0.98-1.29) |
|
| |||||
| Overweight Compared With Healthy Weight or Underweight | |||||
|
| |||||
| Independent variable | 2005 (n = 550) | 2006 (n = 507) | 2007 (n = 480) | 2008 (n = 500) | 2009 (n = 548) |
|
| |||||
| Race | |||||
| American Indian | 1.58 (1.09-2.30) | 1.57 (1.07-2.31) | 1.85 (1.24-2.77) | 1.93 (1.28-2.92) | 1.79 (1.19-2.68) |
| White | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] |
| Sex | |||||
| Boys | 1.15 (0.86-1.54) | 1.47 (1.09-1.99) | 0.95 (0.72-1.25) | 1.18 (0.90-1.53) | 1.16 (0.89-1.52) |
| Girls | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] | 1 [Referent] |
| Age | 1.08 (0.99-1.16) | 1.0 (0.95-1.1) | 0.97 (0.90-1.0) | 0.99 (0.92-1.07) | 1.05 (0.98-1.13) |
a
Determined by Centers for Disease Control and Prevention's 2000 Growth Charts: underweight, <5th BMI percentile; healthy weight, ≥5th percentile and <85th percentile; overweight, ≥85th percentile and <95th percentile; obese, ≥95th percentile and <97th percentile; very obese, ≥97th percentile.