The roles of negative mood, impulsivity, and executive dysfunction in non-suicidal self-injury behaviors among Chinese middle school students

Table 3 Hierarchical regression analysis for NSSI thoughts and behaviors among girls (N_girl = 510)

Model	Regression equation		Overall fit index			Significance of regression coefficients
Model		Predictor variable	R	R²	F	β	LLCI	ULCI	t	p
Model 1	NSSI thoughts	Negative mood	0.546	0.298	215.281^***	0.546	0.018	0.024	14.672	< 0.001
Model 2		Negative mood	0.555	0.308	112.69^***	0.491	0.016	0.022	11.660	< 0.001
		Impulsivity				0.114	0.007	0.042	2.718	0.007
Model 3		Negative mood	0.560	0.313	76.995^***	0.408	0.011	0.02	7.021	< 0.001
		Impulsivity				0.086	0.000	0.037	1.959	0.051
		Executive dysfunction				0.124	0.000	0.014	2.047	0.041
Model 1	NSSI behaviors	Negative mood	0.470	0.221	144.126^***	0.470	0.000	0.012	12.005	< 0.001
Model 2		Negative mood	0.485	0.235	77.948^***	0.405	0.000	0.010	9.159	< 0.001
		Impulsivity				0.136	0.002	0.008	3.064	0.002
Model 3		Negative mood	0.485	0.235	51.890^***	0.395	0.008	0.016	6.428	< 0.001
		Impulsivity				0.132	0.007	0.037	2.833	0.005
		Executive dysfunction				0.016	-0.005	0.006	0.251	0.802

Notes: ^*p < 0.05, ^**p < 0.01, ^***p < 0.001. LLCI represents the lower level of the confidence interval, and ULCI represents the upper level of the confidence interval

ISSN: 2050-7283