Table 3.
Comparison of the means of variables of interest between groups.
| Variables | Non-NSSI (n = 277) M (SD) |
Moderate NSSI (n = 69) M (SD) |
Severe NSSI (n = 92) M (SD) |
Group Comparison F(2435) d (η2) |
Post Hoc Comparison |
|---|---|---|---|---|---|
| DERS strategies | 19.18(6.73) | 21.43(7.10) | 25.60(6.95) | 30.74 *** 0.68 (0.12) |
s > m > n |
| DERS non-acceptance | 15.08(4.73) | 16.80(4.85) | 18.53(5.09) | 18.56 *** 0.56 (0.08) |
s > n, m > n |
| DERS impulse | 12.73(5.18) | 14.94(6.13) | 18.92(6.28) | 42.91 *** 0.80 (0.17) |
s > m > n |
| DERS goals | 15.94(4.85) | 16.30(4.99) | 17.99(4.69) | 6.23 ** 0.27 (0.03) |
s > n |
| DERS awareness | 14.40(4.69) | 15.53(5.27) | 17.24(5.46) | 11.56 *** 0.43 (0.05) |
s > n |
| DERS clarity | 10.29(3.64) | 11.47(4.24) | 12.69(4.56) | 13.37 *** 0.48 (0.06) |
s > n |
| DERS total | 87.60(20.72) | 96.46(24.35) | 110.97(21.38) | 41.44 *** 0.79 (0.16) |
s > m > n |
| Negative affect | 22.04(7.94) | 25.45(9.08) | 28.83(10.24) | 22.44 *** 0.62 (0.09) |
s > m > n |
| Positive affect | 29.87(7.58) | 28.58(8.60) | 27.36(8.70) | 3.60 * 0.25 (0.02) |
s > n |
DERS: Difficulties in Emotion Regulation Scale, NSSI: non-suicidal self-injury, M: mean, SD: standard deviation, d: effect size, η2: partial eta squared; * p < 0.05, ** p < 0.01, *** p < 0.001.