Table 2. Cross-Sectional and Longitudinal Correlates of NSSI.

Baseline Predictors	Lifetime NSSI Frequency at Baselinea (N = 81)	NSSI Frequency Between Baseline and 1-Year Follow-Upb (N = 51)
NSSI Variables
Lifetime NSSI frequency	____	.45***
Lifetime NSSI methods	.93***	.54***
Total years engaged in NSSI	.44***	.16
Recency of NSSIc	−.21	−.38**
Behavioral forecast of future NSSI	.40***	.37**
NSSI intrapersonal functions	.43***	.26
NSSI interpersonal functions	.08	.05
SI-IAT identity version	.10	−.13
SI-IAT attitude version	−.01	.01
Diagnostic and Impulsivity Variables
PHQ alcohol abuse dimensional	.09	−.01
PHQ bulimia dimensional	.31**	.27
PHQ generalized anxiety dimensional	.03	.16
PHQ major depression dimensional	.23*	.16
MSI-BPD featuresd	.39***	.41**
UPPS urgency	.07	.08
UPPS (lack of) perseverance	.26*	.11
UPPS (lack of) premeditation	.20	.25
UPPS sensation seeking	.17	.01

^aLifetime 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.

^bFollow-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.

^cRecency of NSSI indicates how many months it had been since an individual engaged in NSSI.

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

^*p < .05,

^**p < .01,

^***p < .001.