Peak Oxygen Uptake Responses to Training in Obese Adolescents: A Multilevel Allometric Framework to Partition the Influence of Body Size and Maturity Status

Table 3

Multilevel regression analysis of log-transformed peak VO₂ of obese boys adjusted for body mass, age, and interaction term between age and maturity status.

	Model 1	Model 2	Model 3
	Exponent ± standard error	Exponent ± standard error	Exponent ± standard error
Fixed explanatory variable
Intercept	−2.921±0.632^∗∗	−2.323±0.559^∗∗	−2.517±0.701^∗∗
Changes with training	0.127±0.030^∗∗	0.118±0.030^∗∗	0.124±0.030^∗∗
Body mass	0.883±0.148^∗∗	0.530±0.158^∗∗	0.778±0.168^∗∗
Chronological age	Not entered	0.072±0.019^∗∗	Not entered
Interaction age × maturity status	Not entered	Not entered	0.007±0.005
Variance-covariance matrix of random variables
Level 1 (within individuals)
Residual	0.004±0.003	0.007±0.003^∗	0.005±0.003
Level 2 (between individuals)
Intercept	0.034±0.010^∗∗	0.023±0.008^∗∗	0.033±0.010^∗∗
Changes with training	0.018±0.000	0.012±0.000	0.016±0.000
Covariance	−0.010±0.000^∗	−0.008±0.005	−0.010±0.005
−2 restricted log likelihood	−33.857	−39.489	−26.799
Akaike's information criterion	−25.857	−31.489	−18.799

^∗𝑃≤0.05; ^∗∗𝑃≤0.01.