Physical exercise and aggressive behavior in rural left-behind children: the mediating roles of psychological capital and self-control

Table 2 Differences in gender and grade for all variables

	Physical Exercise (M ± SD)	Psychological Capital (M ± SD)	Self-Control (M ± SD)	Aggressive Behavior (M ± SD)
Gender
Boy	35.64 ± 27.79	123.83 ± 24.92	76.91 ± 13.30	59.00 ± 19.97
Girl	26.33 ± 24.27	117.01 ± 25.93	75.59 ± 13.02	58.18 ± 22.49
t	3.79	2.86	1.07	0.41
p	0.000	0.004	0.287	0.683
Grade
Fifth grade	27.83 ± 24.20	116.31 ± 22.34	76.74 ± 12.10	60.79 ± 19.47
Sixth grade	29.10 ± 26.50	116.73 ± 28.45	76.66 ± 13.83	60.25 ± 22.93
Seventh grade	40.83 ± 33.70	129.65 ± 26.11	80.79 ± 13.27	54.29 ± 18.34
Eighth grade	24.50 ± 19.38	118.19 ± 23.02	73.41 ± 12.57	55.77 ± 20.46
Ninth grade	34.38 ± 26.75	122.43 ± 25.45	75.72 ± 13.04	60.83 ± 22.31
F	4.83	3.49	3.32	1.81
p	0.001	0.008	0.011	0.126

ISSN: 2050-7283