Table 4.

The effect of IA on self-injury behavior of medical students [N (%)]

IA	Causing psychological damage		Causes tissue damage		Potentially harmful self-injury		Highly lethal self-injury		No visible damage to the naked ey		Total self-injury
	No	Yes	No	Yes	No	Yes	No	Yes	No	Yes	No	Yes
Yes
N	2,573	111	2,630	54	2,571	113	2,666	18	2,533	151	2,382	302
%	95.9	4.1	98	2	95.8	4.2	99.3	0.7	94.4	5.6	88.7	11.3
No
N	932	122	994	60	928	126	1,039	15	913	141	793	261
%	88.4	11.6	94.3	5.7	88	12	98.6	1.4	86.6	13.4	75.2	24.8
Total
N	3,505	233	3,624	114	3,499	239	3,705	33	3,446	292	3,175	563
%	93.8	6.2	97	3	93.6	6.4	99.1	0.9	92.2	7.8	84.9	15.1
χ2	71.662		34.676		63.147		75.838		75.838		107.99
p	<0.001		<0.001		<0.001		<0.001		<0.001		<0.001

IA: Internet addiction