Physical activity and mental health in school-aged children: a prospective two-wave study during the easing of the COVID-19 restrictions

Table 3 Parameter estimates (unstandardized) for the growth models examining the relationship between mental health problems and the evolution of physical activity during the COVID-19 pandemic

	Mental health problems (total)	Emotional symptoms	Conduct problems	Hyperactivity	Peer problems
Fixed effects
Intercept	6,204.32^**	6,293.37^**	5,838.16^**	6,161.62^**	6,091.51^**
International background	-650.81^**	-668.41^**	-645.25^**	-645.51^**	-648.25^**
Economic status	124.72^**	125.49^**	127.96^**	125.77^**	124.74^**
Time	82.57	44.59	97.17^**	129.29^**	110.40^**
Variable	-13.61	-79.28	79.72	-32.86	-18.68
Time × Variable	1.57	18.44^*	1.33	-7.69	-4.87
Random effects
Residual	883,275^**	883,275^**	883,275^**	883,275^**	883,275^**
Intercept	1,469,071^**	1,441,107^**	1,455,043^**	1,468,251^**	1,473,954^**
Slope	27,402^**	25,564^**	27,479^**	27,155^**	27,418^**
Cov (Intercept, Slope)	-41,146	-33,914	-41,831	-43,073	-42,048

Note. Cov = covariance. The dependent variable was physical activity (number of daily steps) during the six weeks. International background: 0 = no, 1 = yes. Significant relationships between mental health problems and physical activity are marked bold.
^*p < .05; ^**p < .01

ISSN: 1753-2000