TABLE 1.

Demographic and clinical of all participants.

Variable	MDD with NSSI (n = 62)	HC (n = 44)	χ2/F/t	P
Gender
Male	16	11	0.009	0.925
Female	46	33
Age, years	16.74 ± 2.72	17.34 ± 2.85	–1.093	0.277
Education, years	9.66 ± 2.61	10.34 ± 2.92	–1.254	0.213
HAMD-24	25.74 ± 6.35	2.00 ± 2.83	23.18	<0.001***
NSSI diary card (1 mouth)	2.44 ± 1.78	0.00 ± 0.000	9.96	<0.001***
NSSI diary card (1 week)	1.52 ± 1.91	0.00 ± 0.000	5.803	<0.001***

***Indicates p < 0.001.

All subjects were students of Han ethnicity, not married, with no religious affiliation.

Data represent number, mean ± standard deviation.

HAMD, Hamilton Depression Scale; HC, healthy control; NSSI, non-suicidal self-injury.

The frequency of NSSI in the NSSI group in the past 1 month was assessed at baseline (0 week) using NSSI diary card.

The frequency of NSSI in the NSSI group in the past 1 week was assessed at baseline (0 week) using NSSI diary card.