Table 1. Recorded demographic and clinical parameters for all participants (N = 42).
| Healthy Control (N = 16) | MA (N = 14) | MAP (N = 12) | ANOVA | Post hoc Correction | ||
|---|---|---|---|---|---|---|
| Mean ± S.D. | Mean ± S.D. | Mean ± S.D. | X2 (df = 2) | P-value | Post hoc P-value | |
| Age | 25.56 ± 5.99 | 22.71 ± 3.07 | 25 ± 7.39 | 1.565 | 0.457 | ns |
| Gender: (M/F) | (14/2) | (10/4) | (9/3) | 1.242 | 0.537 | ns |
| Level of education (years) | 12.13 ± 1.41 | 10.29 ± 1.98 | 9.75 ± 1.22 | 12.899 | 0.002 | Control > MAP; Control > MA |
| EPQR-S Total | 20.38 ± 5.08 | 19.93 ± 4.57 | 20.58 ± 3.92 | 0.761 | 0.683 | ns |
| EPQR-S Psychoticism | 2.56 ± 1.55 | 2.29 ± 1.86 | 2.83 ± 1.95 | 0.967 | 0.617 | ns |
| EPQR-S Extraversion | 9.94 ± 2.38 | 9.14 ± 2.25 | 7.17 ± 2.55 | 7.561 | 0.023 | Control > MAP |
| EPQR-S Neuroticism | 2.63 ± 2.36 | 4.86 ± 2.88 | 5.00 ± 2.92 | 6.355 | 0.032 | MA > Control; MAP > Control |
| METH duration of use (years) | — | 5.64 ± 2.31 | 6.46 ± 2.92 | 0.734 | 0.392 | ns |
| Nicotine | 7 | 9 | 12 | 9.583 | 0.008 | MAP > Control |
| Cannabis | 5 | 2 | 1 | 2.581 | 0.275 | ns |
| Alcohol | 6 | 7 | 1 | 5.125 | 0.077 | ns |
| Mandrax | 0 | 0 | 1 | 2.500 | 0.287 | ns |
Abbreviations: EPQRS, Eysenck Personality Questionnaire, short scale; METH, methamphetamine; MA, methamphetamine dependence without psychosis; MAP, methamphetamine-associated psychosis; ns, not significant. Shapiro-Wilk test was used to assess normality of variables and either a one-way analysis of variance (ANOVA) or Kruskal-Wallis ANOVA with post hoc Tukey correction were implemented accordingly.