Table 3.
Associations of waist circumference (WC) and BMI measured at age 12 with FEV 1 , FVC and FEV 1 /FVC ratio separately for girls and boys
| FEV 1 | FVC | FEV 1 /FVC ratio | ||||
|---|---|---|---|---|---|---|
| Girls | Boys | Girls | Boys | Girls | Boys | |
| % difference | % difference | % difference | % difference | % difference | % difference | |
| (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | |
| <10th percentile WC | −4.3 (−7.2, −1.4) | −2.9 (−5.9, 0.2) | −5.6 (−8.3, −2.7) | −5.6 (−8.3, −2.8) | 1.1 (−0.4, 2.7) | 2.3 (0.7, 4.0) |
| >90th percentile WC | 1.7 (−1.2, 4.7) | −1.1 (−4.2, 2.1) | 4.1 (1.2, 7.2) | 2.2 (−0.7, 5.2) | −2.0 (−3.5, −0.5) | −2.6 (−4.2, −1.1) |
| <10th percentile BMI | −6.9 (−9.8, −4.0) | −5.2 (−8.2, −2.2) | −6.7 (−9.5, −3.8) | −7.1 (−9.8, −4.4) | −0.2 (−1.8, 1.4) | 1.7 (0.0, 3.3) |
| >90th percentile BMI | 2.7 (−0.3, 5.8) | −1.3 (−4.4, 1.9) | 5.1 (2.0, 8.3) | 1.5 (−1.4, 4.5) | −2.0 (−3.5, −0.5) | −2.3 (−3.9, −0.7) |
| Adjusted for confounders* | ||||||
| <10th percentile WC | −3.4 (−6.2, −0.4) | −3.0 (−6.1, 0.2) | −4.7 (−7.5, −1.8) | −5.6 (−8.3, −2.7) | 1.2 (−0.4, 2.8) | 2.2 (0.6, 3.9) |
| >90th percentile WC | 1.0 (−2.0, 4.1) | −1.3 (−4.5, 1.9) | 3.6 (0.6, 6.8) | 1.9 (−1.0, 5.0) | −2.2 (−3.7, −0.7) | −2.7 (−4.2, −1.1) |
| <10th percentile BMI | −6.1 (−8.9, −3.1) | −5.1 (−8.2, −2.0) | −5.8 (−8.7, −2.9) | −6.9 (−9.7, −4.1) | −0.2 (−1.8, 1.4) | 1.6 (−0.1, 3.3) |
| >90th percentile BMI | 2.0 (−1.1, 5.2) | −1.3 (−4.4, 2.0) | 4.6 (1.5, 7.9) | 1.5 (−1.4, 4.6) | −2.2 (−3.8, −0.6) | −2.3 (−3.8, −0.6) |
The results are a percent difference in the lung function testing variables of the children in the lowest and the highest 10% of sd-score of waist circumference and BMI, compared with children who have a waist circumference or BMI sd-score between the 10th and 90th percentile. All analyses were adjusted for the child’s height and age.
*Adjusted for pubertal development and maternal education level.
Bold represents a statistically significant association.