Table 3.
STAI and NEO Five-Factor Inventory results (sten scale), shown as mean ± standard deviation for the healthy controls and the NPS users; significance of the difference was assessed by the Mann–Whitney U test.
| STAI/NEO Five-Factor Inventory/ | NPS Users (n = 73) |
Control (n = 301) |
Z | p-Value |
|---|---|---|---|---|
| STAI state/scale | 6.08 ± 2.23 | 4.69 ± 2.14 | 4.614 | 0.0000 * |
| STAI trait/scale | 7.34 ± 2.21 | 5.16 ± 2.18 | 6.889 | 0.0000 * |
| Neuroticism/scale | 6.92 ± 2.39 | 4.67 ± 2.01 | 7.160 | 0.0000 * |
| Extraversion/scale | 5.78 ± 2.16 | 6.37 ± 1.98 | −2.113 | 0.0345 * |
| Openness/scale | 4.84 ± 1.95 | 4.53 ± 1.61 | 1.248 | 0.2118 |
| Agreeableness/scale | 4.67 ± 2.06 | 5.60 ± 2.09 | −3.446 | 0.0005 * |
| Conscientiousness/scale | 5.82 ± 2.26 | 6.08 ± 2.15 | −0.747 | 0.4550 |
p—statistical significance, Mann–Whitney U test; N—number of subjects, M ± SD, mean ± standard deviation. * Significant differences between groups.