Table 3.
Percentage of agreement and associations (ORs) between weight classesa at different ages
| Overweight/obesity at 5–7 years | Overweight/obesity at 15–17 years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Crude | Adjustedb | Crude | Adjustedb | ||||||||
| Age (years) | Weight classa | %c | OR | 95 % CI | OR | 95 % CI | %c | OR | 95 % CI | OR | 95 % CI |
| 2–4 | Thin/normal weight | 1.0 | 1.0 | 1.0 | 1.0 | ||||||
| Overweight/obese | 52.5 | 11.6 | (6.4–21.0) | 11.0‡ | (6.0–20.1) | 39.3 | 3.0 | (1.7–5.3) | 3.2 | (1.8–5.6) | |
| 5–7 | Thin/normal weight | - | - | - | - | 1.0 | 1.0 | ||||
| Overweight/obese | - | - | - | - | 63.0 | 11.1 | (6.4–19.2) | 12.1 | (6.9–21.4) | ||
A sub study of The Tromsø Study: Fit Futures N = 532: 279 boys, 253 girls
aWeight classes are based on BMI according to the International Obesity Taskforce’s age- and sex-specific cut-off values in children 2–18 years: thinness: adult BMI <18.5 kg/m2, normal weight: adult BMI ≥18.5- < 25 kg/m2, overweight: adult BMI ≥25- < 30 kg/m2, obesity: adult BMI ≥30 kg/m2 [28]
bAdjusted for gender, exact age (years, months) at first time point and time (years, months) between measurements
cPercent of those overweight/obese at younger age that are still overweight at the older age = percent agreement/ positive predictive value
‡ Gender was a significant covariate p = 0.02
BMI body mass index, CI confidence interval, OR odds ratio