R5–20 (Pa·L−1·s) | AX0.5 (Pa·L−1)0.5 | |||||||||||
Girls | Boys | Girls | Boys | |||||||||
β* | 95% CI | P value | β* | 95% CI | P value | β* | 95% CI | P value | β* | 95% CI | P value | |
BMI status 8 years | ||||||||||||
Thinness | 8.6 | −10.0 to 27.2 | 0.36 | −8.8 | −25.2 to 7.5 | 0.29 | 0.8 | −1.0 to 2.7 | 0.36 | −1.0 | −2.6 to 0.6 | 0.21 |
Normal weight | Referent | Referent | Referent | Referent | ||||||||
Overweight | 10.9 | 2.0 to 19.7 | 0.02 | 6.8 | −0.57 to 14.1 | 0.07 | 1.1 | 0.3 to 2.0 | 0.009 | 0.4 | −0.3 to 1.2 | 0.23 |
Obesity | 11.6 | −8.2 to 31.3 | 0.25 | 31.7 | 16.7 to 46.7 | <0.001 | −0.4 | −2.4 to 1.5 | 0.65 | 2.3 | 0.8 to 3.8 | 0.003 |
BMI status 16 years | ||||||||||||
Thinness | −15.9 | −25.8 to −6.0 | 0.002 | −12.9 | −21.9 to −3.9 | 0.005 | −0.4 | −1.4 to 0.6 | 0.42 | −0.3 | −1.2 to 0.7 | 0.58 |
Normal weight | Referent | Referent | Referent | Referent | ||||||||
Overweight | 32.7 | 24.5 to 40.9 | <0.001 | 22.3 | 16.1 to 28.5 | <0.001 | 3.1 | 2.3 to 3.9 | <0.001 | 1.6 | 0.9 to 2.2 | <0.001 |
Obesity | 56.8 | 38.3 to 75.4 | <0.001 | 47.8 | 34.9 to 60.7 | <0.001 | 3.1 | 1.3 to 4.9 | 0.001 | 3.5 | 2.2 to 4.8 | <0.001 |
*Represent median difference in outcome compared with the reference group, calculated by linear regression on the median adjusted for age and height.
AX0.5, area under the reactance curve; BMI, body mass index; R, frequency dependence of resistance.