Table 2.
Multiple logistic regression analyses predicting NSSI during the 18-month follow-up period
| Predictors | Any NSSI | Development of NSSI | Continuation of NSSI |
|---|---|---|---|
| Univariate: | |||
| Impulsivity | 6.62 (3.73)** | 11.7 (9.85)** | 2.13 (1.78) |
| AI | 24.1 (13.0)*** | 16.7 (11.8)*** | 10.4 (9.32)** |
| Multivariate: | |||
| Impulsivity | 6.39 (3.83)** | 11.1 (9.67)** | 2.47 (2.74) |
| BPD | 155.6 (164.3)*** | 87.3 (143.7)** | 18.2 (15.9)** |
| Age | 0.91 (0.02)*** | 0.91 (0.03)** | 0.95 (0.03) |
| Sex | 0.77 (0.41) | 0.50 (0.38) | 0.79 (0.87) |
| Multivariate: | |||
| AI | 17.3 (10.5)*** | 13.5 (10.1)** | 10.3 (10.6)* |
| BPD | 38.0 (31.4)*** | 34.6 (45.0)** | 8.59 (8.60)* |
| Age | 0.92 (0.17)*** | 0.92 (0.02)** | 0.95 (0.03) |
| Sex | 0.45 (0.27) | 0.30 (0.25) | 0.74 (0.72) |
Note. Values are odds ratios (and linearized standard errors). All predictors were measured at Time 1. The dependent variable in each model was the presence of NSSI during the follow-up period assessed at Time 2. Models predicting any NSSI included all participants regardless of whether they had a history of NSSI at Time 1 (n = 2344). Models predicting the development of NSSI included only participants with no history of NSSI at Time 1 (n = 2259). Models predicting the continuation of NSSI included only participants with a history of NSSI at Time 1 (n = 85)
NSSI nonsuicidal self-injury, AI affective instability; BPD borderline personality disorder
*p < .05
**p < .01
***p < .001