Table 2.
Prevalence of overweight, by sex and age, as determined using the different sets of criteria.
| n | Prevalence of overweight (95% CI) |
McNemar test for comparison of proportions returned by the different sets of criteria | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| SPA* | 95% CI | IOTF† | 95% CI | WHO‡ | 95% CI | SPA-WHO§ | IOTF-WHO| | SPA-IOTF¶ | ||
| Both sexes | P | P | P | |||||||
| All | 7,659 | 14.0 | (13.2–14.8) | 24.2 | (23.2–25.2) | 26.2 | (25.2–27.2) | <0.001 | <0.001 | <0.001 |
| 6 years | 1,829 | 11.1 | (9.7–12.5) | 19.4 | (17.6–21.2) | 24.5 | (22.6–26.5) | <0.001 | <0.001 | <0.001 |
| 7 years | 1,861 | 13.2 | (11.6–14.7) | 24.5 | (22.5–26.4) | 25.8 | (23.8–27.7) | <0.001 | 0.183 | <0.001 |
| 8 years | 1,961 | 14.9 | (13.4–16.5) | 26.1 | (24.1–28.0) | 26.6 | (24.6–28.5) | <0.001 | 0.629 | <0.001 |
| 9 years | 2,009 | 16.5 | (14.9–18.1) | 26.4 | (24.5–28.3) | 27.7 | (25.7–29.6) | <0.001 | 0.219 | <0.001 |
| Boys | ||||||||||
| All | 3,931 | 14.1 | (13.0–15.2) | 23.8 | (22.4–25.1) | 26.7 | (25.3–28.1) | <0.001 | <0.001 | <0.001 |
| 6 years | 927 | 10.5 | (8.5–12.5) | 17.9 | (15.5–20.4) | 26.2 | (23.4–29.1) | <0.001 | <0.001 | <0.001 |
| 7 years | 954 | 12.1 | (10.0–14.1) | 23.5 | (20.8–26.2) | 25.9 | (23.1–28.7) | <0.001 | 0.121 | <0.001 |
| 8 years | 1,018 | 15.8 | (13.6–18.0) | 26.3 | (23.6–29.0) | 26.5 | (23.8–29.3) | <0.001 | 0.948 | <0.001 |
| 9 years | 1,032 | 17.7 | (15.3–20.0) | 26.8 | (24.3–29.5) | 27.9 | (25.2–30.6) | <0.001 | 0.542 | <0.001 |
| Girls | ||||||||||
| All | 3,728 | 13.8 | (12.7–15.0) | 24.6 | (23.3–26.0) | 25.7 | (24.3–27.1) | <0.001 | 0.051 | <0.001 |
| 6 years | 901 | 11.7 | (9.6–13.8) | 21.0 | (18.3–23.6) | 22.8 | (20.1–25.5) | <0.001 | 0.046 | <0.001 |
| 7 years | 907 | 14.3 | (12.0–16.6) | 25.5 | (22.7–28.3) | 25.6 | (23.1–28.3) | <0.001 | 1.000 | <0.001 |
| 8 years | 943 | 14.0 | (11.8–16.2) | 25.9 | (23.1–28.7) | 26.6 | (23.8–29.4) | <0.001 | 0.569 | <0.001 |
| 9 years | 977 | 15.2 | (13.0–17.5) | 26.1 | (23.3–28.8) | 27.4 | (24.6–30.2) | <0.001 | 0.219 | <0.001 |
*Prevalence calculated using SPART criteria (BMI ≥ P85 and <P97).
†Prevalence calculated using IOTF reference values (cut-off points corresponding to an adult BMI ≥ 25 and <30 kg/m2).
‡Prevalence calculated with WHO growth standards (BMI ≥ 1 SD and <2 SD).
§McNemar test for comparison of prevalence of overweight returned using the SPART and WHO criteria.
|McNemar test for comparison of prevalence of overweight returned using IOTF and WHO criteria.
¶McNemar test for comparison of prevalence of overweight returned using the SPART and IOTF criteria.