Table 3.

Relationship between body mass category (BMI) and selected variables—children age from 6 to 10.

Selected Variables	Age
	6–10										Z	p
	Body Mass Category (BMI) According (WHO)
	Normal Body Mass					Overweight/Obese
	$\overline{\mathit{x}}$	SD	Me	Min.	Max.	$\overline{\mathit{x}}$	SD	Me	Min.	Max.
Systolic pressure (mmHg)	106.12	12.88	105	67	155	110.47	16.20	111	62	141	−2.02	0.043
Diastolic pressure (mmHg)	70.83	11.90	70	48	132	72.51	8.49	72	47	87	-2.20	0.028
Time of watching movies or programs in the Internet (on an iPad, tablet, computer, smartphone) or TV per day in the weekdays (h)	1.97	0.96	2	0	5	2.05	0.95	2	0	5	−0.65	0.516
Time of watching movies or programs in the Internet (on an iPad, tablet, computer, smartphone) or TV per day on the weekend (h)	2.57	0.97	3	0	5	2.81	1.01	3	0	5	−1.10	0.270
Time of playing games (on your computer/game console /smartphone/iPad, etc.) per day in the weekdays (h)	1.18	1.09	1	0	5	1.40	1.07	1	0	5	−1.29	0.195
Time of playing games (on your computer/game console /smartphone/iPad, etc.) per day on the weekend (h)	1.90	1.10	2	0	5	2.02	1.12	2	0	5	−0.72	0.474
Using a smartphone on a typical day (n)	2.21	1.34	2	1	7	2.72	1.58	2	1	7	−1.99	0.047
Days with 60 min or longer physical activity (n)	3.67	1.83	4	0	7	3.53	2.16	3	0	7	−0.44	0.660
Time of sleeping during a 24 h period on school days (h)	9.35	0.88	9.5	6.5	11.5	9.14	0.93	9.0	6.0	12.0	−1.75	0.081
Time of sleeping during a 24 h period on weekends (h)	10.42	1.14	10.5	7.0	13.0	10.43	1.35	10.5	6.0	13.0	−0.64	0.525
Sleep quality (n)	1.53	0.61	1	1	4	1.58	0.54	2	1	3	−0.76	0.449

$\overline{x}$—arithmetic mean; Me—median; SD—standard deviation; Z—Mann–Whitney U test result; p—p-value, indicate significant values (p < 0.05); n—number in accordance with the possibility of answering.