Table 4 Curvilinear regression equations of WHtR and VO_2max in Chinese children and adolescents

Boys

 7–9 yrs

Y=-20.370 × ² + 14.182X + 45.111

0.013

<0.01

 10–12 yrs

Y=-55.863 × ² + 39.758X + 38.087

0.049

<0.01

 13–15 yrs

Y=-95.291 × ² + 74.329X + 29.728

0.019

<0.01

 16–18 yrs

Y=-133.134 × ² + 106.747X + 19.843

0.02

<0.01

Girls

 7–9 yrs

Y=-16.084 × ² + 10.859X + 45.394

0.006

<0.01

 10–12 yrs

Y=-12.005 × ² + 1.682X + 45.195

0.025

<0.01

 13–15 yrs

Y=-36.634 × ² + 26.081X + 35.986

0.004

<0.01

 16–18 yrs

Y=-68.701 × ² + 50.408X + 26.431

0.011

<0.01

Total

 7–9 yrs

Y=-16.789 × ² + 11.530X + 45.408

0.008

<0.01

 10–12 yrs

Y=-34.146 × ² + 21.717X + 41.270

0.028

<0.01

 13–15 yrs

Y=-50.482 × ² + 38.968X + 34.868

0.004

<0.01

 16–18 yrs

Y=-66.035 × ² + 54.740X + 26.835

0.003

<0.01