Projected rates of obesity to 2015 (based on linear and non-linear trends) by age groups and sex
| 2–5 years | 6–10 years | 11–15 years | 16–18 years | All 2–10 | All 11–18 | |
| % (95% prediction intervals) | % (95% prediction intervals) | % (95% prediction intervals) | % (95% prediction intervals) | % (95% prediction intervals) | % (95% prediction intervals) | |
| Boys | ||||||
| 2015 Linear | 10.2 (5.4 to 14.9) | 10.0 (7.2 to 12.8) | 8.5 (4.8 to 12.2) | 7.1 (1.8 to 12.4) | 10.1 (7.5 to 12.6) | 8.0 (4.5 to 11.5) |
| R2 | 0.761 | 0.406 | ||||
| 2015 Power | 7.7 (3.3 to 18.0) | 7.7 (4.8 to 12.4) | 7.5 (4.1 to 13.7) | 5.6 (2.2 to 14.6) | 7.8 (4.9 to 12.4) | 6.9 (4.0 to 11.7) |
| R2 | 0.699 | 0.540 | ||||
| 2015 Exponential | 13.9 (5.0 to 38.6) | 13.2 (7.7 to 22.8) | 10.9 (4.5 to 26.2) | 7.2 (2.1 to 24.4) | 13.5 (7.9 to 23.0) | 9.5 (4.4 to 20.2) |
| R2 | 0.760 | 0.423 | ||||
| Girls | ||||||
| 2015 Linear | 7.6 (4.0 to 11.1) | 9.8 (5.8 to 13.8) | 9.5 (5.5 to 13.4) | 9.9 (4.7 to 15.1) | 8.9 (5.8 to 12.1) | 9.7 (6.0 to 13.3) |
| R2 | 0.349 | 0.367 | ||||
| 2015 Power | 6.4 (3.9 to 10.5) | 8.4 (5.4 to 12.9) | 8.3 (5.6 to 12.2) | 9.0 (5.1 to 16.0) | 7.6 (5.3 to 10.9) | 8.6 (6.1 to 12.1) |
| R2 | 0.368 | 0.589 | ||||
| 2015 Exponential | 7.6 (4.1 to 14.2) | 10.4 (5.9 to 18.1) | 10.1 (5.9 to 17.6) | 11.0 (4.8 to 24.7) | 9.3 (5.9 to 14.6) | 10.6 (6.2 to 17.9) |
| R2 | 0.372 | 0.418 |