Table 1.

Demographic characteristic and differences on NSSI scores (N = 666)

Characteristics		N (%)	Mean ± SD	t/F	df	p
Gender	Male	426 (64.00)	0.163 ± 0.341	− 6.027	367.777	0.000***
	Female	240 (36.00)	0.380 ± 0.498
Sexual orientation	Homosexual	496 (74.50)	0.204 ± 0.390	− 3.650	251.546	0.000***
	Bisexual	170 (25.50)	0.351 ± 0.474
Family location	Rural	138 (20.70)	0.208 ± 0.384	− 1.048	664	0.295
	City	528 (79.30)	0.250 ± 0.426
Stable intimate relationship	One year	172 (25.80)	0.207 ± 0.418	0.401	2	0.670
	Over 1 year	77 (11.60)	0.234 ± 0.423
	No	417 (62.60)	0.257 ± 0.415
Employment status	Students at school	319 (47.90)	0.310 ± 0.468	1.459	3	0.225
	Working within the Institution	97 (14.60)	0.143 ± 0.325
	Working outside the Institution	188 (28.20)	0.164 ± 0.334
	Others	62 (9.30)	0.274 ± 0.439
Educational level	Elementary school and below	1 (0.20)	1.255 ± (-)	1.991	4	0.094
	Junior high school	27 (4.10)	0.607 ± 0.571
	High school	104 (15.60)	0.376 ± 0.486
	Undergraduate	419 (62.90)	0.211 ± 0.392
	Master and above	115 (17.30)	0.134 ± 0.306
Economic level	Lower than the local average Level	84 (12.60)	0.287 ± 0.401	0.110	2	0.896
	At the local average level	457 (68.60)	0.240 ± 0.420
	Higher than the local average level	125 (18.80)	0.216 ± 0.420

^***p < 0.001