Table 2.

Physical activity measured as vector magnitude counts per minute (CPM) in boys and girls

Variable	Girls n = 97	Boys n = 86	Difference	Effect size	P-value
	Mean ± SD	Mean ± SD	Mean (95% CI)
	3536.5 ± 710.3	4152.8 ± 880.8		0.770	<0.001
Grade
One	3613.5 ± 668	3752.4 ± 611.6	−129 (−351, 608)	0.002	0.597
Four	3472.6 ± 743.9	4635.4 ± 919.3	−1134 (−1575, −693)	0.143	<0.001
Nationality
Qatari	3578.1 ± 732	4155.3 ± 905.2	−765 (−376, −1153)	0.089	<0.001
Non Qatari	3474.6 ± 681.4	4137.6 ± 745.9	−452 (−148, 1052)	0.014	0.139
Overweight Status
Underweight	3103.2 ± 784.6	3994.8 ± 384.5	−771 (−1774, 232)	0.015	0.131
Normal	3698.4 ± 648.9	4019.5 ± 898.3	−561 (−929, −194)	0.056	0.003
Overweight	3364.8 ± 679.6	4242.1 ± 847.7	−420 (−1128, 287)	0.009	0.243
Obese	3547.2 ± 724.7	4521.8 ± 876	−742 (−1400, −83)	0.031	0.027
Day of the week
Sunday	3393.9 ± 873.0	3708.9 ± 1302.5	−352 (−675, −29)	0.025	0.033
Monday	3468.5 ± 736.4	4693.6 ± 1088.8	−1258 (−1560, −956)	0.291	<0.001
Tuesday	3762.7 ± 675.9	4462.3 ± 1136.7	−744 (−1040, −448)	0.124	<0.001
Wednesday	3814.7 ± 892.6	4015.7 ± 928.1	−166 (−434, 103)	0.008	0.224
Thursday	3384.8 ± 1042.2	3694.4 ± 1147.9	−315 (−636, −6)	0.020	0.054