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

Table 4 Parameter estimates (unstandardized) for the growth models examining the relationship between health-related quality of life and the evolution of physical activity during the COVID-19 pandemic

	Physical well-being	Psychological well-being	Moods and emotion	Self-perception	Autonomy	Parent relation	Financial resources	Social support	School environment
Fixed effects
Intercept	4,763.05^**	5,961.54^**	6,050.51^**	5,929.09^**	6,440.30^**	5,524.23^**	6,076.54^**	5,312.46^**	6,926.77^**	5,163.92^**
International background	-712.19^**	-663.84^**	-643.09^**	-642.22^**	-632.56^**	-645.18^**	-616.43^**	-635.78^**	-585.00^**	-631.94^**
Economic status	121.73^**	127.40^**	124.70^**	124.90^**	123.93^**	124.90^**	132.49^**	127.59^**	115.83^*	121.32^*
Time	50.00	22.98	89.81	143.53	-29.71	265.75^*	288.20^*	58.46	-23.57	190.37
Variable	79.14^*	2.84	-0.06	5.90	-20.88	21.66	-11.41	30.57	-35.18	70.56
Time × Variable	2.89	3.32	0.37	-2.20	6.97	-6.86	-14.80	1.83	5.42	-6.92
Random effects
Residual	883,275^**	883,275^**	883,275^**	883,275^**	883,275^**	883,275^**	883,275^**	883,275^**	883,275^**	883,275^**
Intercept	1,413,883^**	1,475,482^**	1,474,484^**	1,473,635^**	1,468,187^**	1,466,621^**	1,469,447^**	1,453,424^**	1,444,695^**	1,449,069^**
Slope	27,393^**	27,177^**	27,479^**	27,384^**	26,863^**	26,682^**	26,114^**	27,415^**	26,827^**	27,242^**
Cov (Intercept, Slope)	-45,832	-42,214	-41,687	-41,390	-39,658	-39,189	-41,673	-42,503	-36,774	-39,199

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 health-related quality of life and physical activity are marked bold.
^*p < .05; ^**p < .01

ISSN: 1753-2000