Table 3.

Model fit indexes for the conceptual model and the five alternative mediation models

	df	χ2 (df)	CFI	RMSEA	SRMR
The proposed model	6	29.931	0.976	0.077	0.026
Model 1	6	41.130	0.965	0.094	0.040
Model 2	6	39.960	0.967	0.091	0.030
Model 3	6	38.960	0.967	0.091	0.030
Model 4	6	41.130	0.965	0.094	0.040
Model 5	6	47.962	0.958	0.102	0.043

The proposed model: SMS → SOC → self-criticism → depression → NSSI

Model 1: SMS → SOC → depression → self-criticism → NSSI

Model 2: SMS → self-criticism → SOC → depression → NSSI

Model 3: SMS → self-criticism → depression → SOC → NSSI

Model 4: SMS → depression → SOC → self-criticism → NSSI

Model 5: SMS → depression → self-criticism → SOC → NSSI