Table 2.
Descriptive statistics and Jonckheere–Terpstra trend tests comparing experiential avoidance between Control, NSSI and NSSI + SB groups.
| Variable | Control (C) | NSSI | NSSI + SB | TJT | Z | p | Ordered Effect | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mdn | IQR | Mdn | IQR | Mdn | IQR | |||||
| Experiential avoidance (total) a,b | 119.00 | 51.00 | 129.00 | 47.75 | 128.50 | 49.00 | 13,655.00 | 1.90 | 0.058 | - |
| Behavioural avoidance a,c | 36.00 | 13.50 | 38.00 | 11.00 | 39.00 | 15.50 | 15,512.00 | 1.89 | 0.058 | - |
| Distress aversion a,d | 44.00 | 13.50 | 47.00 | 15.00 | 43.00 | 14.25 | 14,902.50 | 1.42 | 0.157 | - |
| Procrastination a,c | 26.00 | 10.00 | 26.00 | 9.00 | 25.50 | 10.50 | 13,716.50 | −0.38 | 0.707 | - |
| Distraction/suppression a,e | 28.00 | 8.00 | 27.00 | 9.00 | 26.50 | 15.00 | 13,205.00 | −0.85 | 0.397 | - |
| Repression/denial a,f | 30.00 | 13.50 | 33.00 | 14.00 | 38.50 | 15.00 | 15,812.00 | 2.93 | 0.003 ** | C < NSSI < NSSI + SB |
| Distress endurance a,g | 46.00 | 8.00 | 46.00 | 11.75 | 43.00 | 15.25 | 12,254.00 | −1.814 | 0.070 | - |
a As measured by the MEAQ; ** denotes significant at <0.01; b n = 291 c n = 310; d n = 308; e n = 309; f n = 305; g n = 307; IQR: interquartile range, Mdn: median.