. Author manuscript; available in PMC: 2015 May 15.

Published in final edited form as: Behav Ther. 2011 Jun 12;42(4):751–762. doi: 10.1016/j.beth.2011.04.005

Table 3. Unique Prediction of NSSI Frequency Over the 1-Year Follow-Up.

	NSSI Frequency Between Baseline and 1-Year Follow-Up^a
Baseline Predictors	β	t	p
Lifetime NSSI frequency^b	−.65	−2.06	.046
Lifetime NSSI methods	.86	2.91	.006
Recency of NSSI	−.21	−1.69	.098
Behavioral forecast of future NSSI	.19	1.39	.171
MSI-BPD features^c	.37	2.96	.005

All Variables Entered Simultaneously R² = .48, F(5, 45) = 7.94, p < .001, Cohen's f² = 0.92

Follow-up NSSI frequency (between baseline and 1-year follow-up) was created by rank transforming each of the 12 NSSI behaviors (so that each behavior had the same mean) and then summing the 12 rank-transformed behavior scores to obtain a total frequency score.

Lifetime frequency of NSSI behaviors was created by rank transforming each of the 12 NSSI behaviors (so that each behavior had the same mean) and then summing the 12 rank-transformed behavior scores to obtain a total frequency score.

MSI-BPD features total score did not include the suicide/self-injury item.