Table 2. Sample characteristics according to gender and overall participants.

	Boys			Girls			All			pa
	Mean	SD	N	Mean	SD	N	Mean	SD	N
Age (years)	12.2	0.6	97	12.2	0.6	127	12.2	0.6	224	0.984
Measurements of cognitive function
PRM no. of correct	20.9	2.8	97	20.9	2.2	127	20.9	2.5	224	0.981
SSP span length (scale 0–9)	6.6	1.3	97	6.7	1.4	127	6.6	1.3	224	0.561
RTI five-choice (ms)	623	78	97	680	98	127	655	94	224	<0.001
RVP A’ (scale 0.00–1.00)b	0.97	0.02	97	0.97	0.03	127	0.97	0.02	224	0.946
IED no. of children who completed the test (%)	67		97	66		127	67		224	0.891
Measurements of physical activity and sedentary behavior
Objectively measured MVPA (min/day)c	60.3	22.4	89	56.9	16.9	118	58.4	19.5	207	0.231
Objectively measured sedentary time (%/day)d	66.1	5.9	89	67.9	5.1	127	67.2	5.5	207	0.013
Self-reported MVPA (d/week with ≥60 min MVPA)	5.0	1.8	95	5.0	1.5	127	5.0	1.6	222	0.923
Self-reported total screen time (h/day)	4.0	2.0	95	3.4	1.8	127	3.7	1.9	222	0.015
TV	1.6	1.0	96	1.6	0.9	127	1.6	0.9	223	0.982
Computer/video games	1.4	0.9	95	0.7	0.8	127	1.0	0.9	222	<0.001
Computer use (other than playing)	1.0	0.8	96	1.1	0.8	127	1.0	0.8	223	0.244

Abbreviations: SD, standard deviation; MVPA, moderate to vigorous physical activity; PRM, Pattern Recognition Memory; SSP, Spatial Span; RTI, Reaction Time; RVP, Rapid Visual Information Processing; IED, Intra-Extra Dimensional Set Shift.

^aP-values for the gender differences (T-test).

^bA’ indicates the result in RVP test. The scale is 0.00–1.00, whereas 0.00 indicates a poor result and 1.00 a good result.

^cMVPA measured with the ActiGraph accelerometer using a cut-off value of 2,296 counts per minute.

^dSedentary time measured by the ActiGraph accelerometer using a cut-off value 100 counts per minute and expressed as percentage of daily monitoring time (%/day).