Table 3.

Robust orthogonal regression estimates for regression model (8).

PA	${\widehat{\beta }}_2^{\left(PA\right)}$	Standard Error	p-Value
LIPA	$1.4295$	$0.1597$	$<0.001$
MPA	$-1.3179$	$0.1816$	$<0.001$
VPA	$-0.1116$	$0.0397$	$0.014$

Note: R² = 0.3005 for all models. LIPA, light-intensity physical activity; MPA, moderate physical activity; VPA, vigorous physical activity.