Table 4. Absolute and relative increases in obesity prevalence by education level from 1988 to 2012.
| Relative increase | Absolute increase | |||
| 1988–2012 | 1988–2012 | |||
| PRa | 95% CI | %b | 95% CI | |
| Urban areas | ||||
| Higher education | 5.92* | (4.03, 8.70) | 20.41 | (17.04, 23.78) |
| High school | 5.45 | (4.14, 7.16) | 25.39 | (21.72, 29.06) |
| Secondary | 4.74 | (3.81, 5.91) | 27.37 | (24.47, 30.27) |
| Primary or no educ | 3.23 | (2.88, 3.63) | 29.29 | (26.17, 32.40) |
| Rural areas | ||||
| Higher education | 4.82† | (0.90, 25.80) | 16.49 | (7.19, 25.78) |
| High school | 6.96 | (2.92, 16.55) | 20.58 | (14.93, 26.22) |
| Secondary | 3.16 | (1.61, 6.22) | 17.57 | (11.56, 23.57) |
| Primary or no educ | 3.70 | (2.64, 5.18) | 24.30 | (20.43, 28.17) |
a
Age adjusted prevalence ratio.
b
Age adjusted prevalence difference.
Test for homogeneity across education levels *p<0.001 † p = 0.50.