Table 4.

Statistical relationships: Logistic regressions

Logistic regressions	OR	95% CI	Z	P	Pseudo-R 2
Suicidality					0.00
Intercept	1.47	[1.01–2.14]	2.01	0.04*
Symptoms of addictiona	1.07	[0.95–1.21]	1.12	0.26
“Physically hazardous” item b					0.05
Intercept	0.29	[0.19–0.42]	6.23	<0.001***
Symptoms of addictionc	1.37	[1.19–1.57]	4.43	<0.001***

^a Symptoms of addiction (here used interchangeably addictive features of NSSI) is defined as the number of NSSI-adapted DSM-5 SUD criteria (out of 11) endorsed by a user in their posts.

^b This item comes from the DSM-5 SUD criteria “recurrent substance use/NSSI in situations in which it is physically hazardous.” Coders were instructed to consider this NSSI-adapted criterion as NSSI that is particularly dangerous, requiring medical attention or resulting in permanent scarring.

^c The “physically hazardous” item was excluded from symptoms of addiction in this particular model such that number of symptoms was out of 10 (rather than 11).