TABLE 2—
Regression Coefficients for Body Mass Index (kg/m2) Trends Among Brazilian Adolescents Aged 10 to 19 Years, by Region (Northeast [Poorest] vs Southeast [Richest]) and Area (Rural vs Urban): Survey Data From 1975 Through 1997
| Northeast | Southeast | |||||
| β | P | R2 | β | P | R2 | |
| Boys | ||||||
| Rural | ||||||
| Age group | 1.99 | <.0001 | 0.41 | 1.95 | <.0001 | 0.34 |
| Trend from 1975 to 1997 | 0.02 | <.0001 | 0.06 | <.0001 | ||
| Age group × trend | −0.12 | .065 | 0.02 | .880 | ||
| Urban | ||||||
| Age group | 1.46 | <.0001 | 0.30 | 1.78 | <.0001 | 0.24 |
| Trend from 1975 to 1997 | 0.08 | <.0001 | 0.09 | <.0001 | ||
| Age group × trend | 0.17 | .039 | −0.14 | .150 | ||
| Girls | ||||||
| Rural | ||||||
| Age group | 2.27 | <.0001 | 0.33 | 2.22 | <.0001 | 0.30 |
| Trend from 1975 to 1997 | 0.03 | .0001 | 0.050 | <.0001 | ||
| Age group × trend | 0.01 | .913 | 0.12 | .325 | ||
| Urban | ||||||
| Age group | 1.950 | <.0001 | 0.25 | 0.97 | <.0001 | 0.17 |
| Trend from 1975 to 1997 | 0.058 | <.0001 | 0.12 | <.0001 | ||
| Age group × trend | −0.03 | .738 | 0.34 | .001 | ||