Table 5.

Online self-injury activities, perceived consequences, and SITBs across classes

	Class 1	Class 2	Class 3
Online Self-Injury Activities	Prob. (SE) / M (SE)	Prob. (SE) ) / M (SE)	Prob. (SE) ) / M (SE)	χ2
Shared content related to self-injury	0.16 (0.05)a	0.41 (0.09)b	0.47 (0.11)b	16.26***
Viewed content related to self-injury	0.51 (0.06)a	0.63 (0.09)a,b	0.76 (0.11)b	7.11*
Talked about self-injury with online friends	0.28 (0.05)a	0.42 (0.06)a,b	0.53 (0.08)b	7.48*
Talked about self-injury with “real life” friends	0.64 (0.06)	0.78 (0.04)	0.81 (0.07)	4.93
Perceived Consequences of Online Self-Injury Activities
Behavioral triggering	1.09 (0.12)a	1.65 (0.11)b	1.67 (0.19)b	13.04**
Normalization	0.88 (0.11)a	1.77 (0.11)b	1.74 (0.19)b	38.87***
Thwarted recovery	0.88 (0.11)a	1.60 (0.10)b	1.80 (0.18)b	30.80***
Social comparison	0.81 (0.11)a	1.84 (0.11)b	2.24 (0.18)b	61.89***
Discovery of new methods	0.56 (0.09)a	1.50 (0.12)b	1.42 (0.20)b	45.86***
Self-Injurious Thoughts and Behaviors
History of NSSI	0.72 (0.05)a	0.76 (0.05)a,b	0.89 (0.05)b	5.46†
Suicidal Ideation	39.21 (2.75)a	48.42 (2.09)b	49.48 (3.52)b	8.43*
History of Suicide Attempt	0.66 (0.06)	0.67 (0.04)	0.54 (0.09)	1.77
Demographics
Age	15.33 (0.18)	15.13 (0.15)	14.69 (0.26)	0.42
Female	0.71 (0.05)	0.60 (0.05)	0.59 (0.08)	0.53
Gender Minority	0.10 (0.04)	0.14 (0.04)	0.19 (0.07_	0.53
Sexual Minority	0.53 (0.06)	0.53 (0.05)	0.62 (0.09)	0.83

Note: Prob. = conditional probability of engagement in this behavior or belonging in this group, given latent class membership; NSSI = nonsuicidal self-injury. χ² represent Wald Chi-Square values for overall tests of association. A single test was conducted to compare probabilities for all three gender groups (female, male, gender minority) across three classes. Superscript letters denote column proportions differ from each other at the p < .05 level. Total n = 253.

^†p < .07

^*p < .05

^**p < .01

^***p < .001