Table 1.
Means, standard deviations, and correlation of study variables.
| Variables (Range) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. DRD2 C957T risk allele | - | |||||||||||
| 2. DRD2 Taq1 risk allele | 0.004 | - | ||||||||||
| 3. Combined risk allele | 0.83 *** | 0.16 * | - | |||||||||
| 4. Male | 0.09 | 0.03 | 0.08 | - | ||||||||
| 5. Age (19–33) | 0.02 | −0.05 | −0.05 | 0.23 ** | - | |||||||
| 6. Problematic gaming (1–105) | −0.07 | −0.02 | −0.03 | −0.30 *** | −0.02 | - | ||||||
| 7. Interpersonal stress (0–15) | −0.11 | 0.01 | −0.10 | −0.03 | 0.08 | 0.29 *** | - | |||||
| 8. Avoidant coping (6–24) | −0.10 | 0.03 | −0.02 | −0.21 ** | −0.03 | 0.49 *** | 0.19 * | - | ||||
| 9. Impulsivity (22–69) | −0.003 | −0.04 | 0.05 | −0.25 ** | 0.08 | 0.47 *** | 0.20 ** | 0.50 *** | - | |||
| 10. Depression (0–25) | −0.11 | −0.02 | −0.08 | −0.26 ** | −0.07 | 0.57 *** | 0.31 *** | 0.42 *** | 0.50 *** | - | ||
| 11. Anxiety (0–21) | −0.10 | −0.01 | −0.03 | −0.15 * | 0.15 | 0.50 *** | 0.40 *** | 0.28 *** | 0.42 *** | 0.71 *** | - | |
| 12. ADHD (0–6) | −0.13 | −0.05 | −0.09 | −0.36 *** | −0.05 | 0.53 *** | 0.20 *** | 0.41 *** | 0.59 *** | 0.47 *** | 0.40 *** | - |
| Mean | 8.3% a | 70.6% a | 6.0% a | 63.1% a | 22.09 | 39.67 | 0.93 | 12.37 | 42.88 | 6.36 | 4.83 | 2.81 |
| Standard deviation | - | - | - | - | 2.35 | 23.05 | 1.91 | 3.73 | 8.64 | 5.16 | 5.01 | 1.68 |
| Skewness | 3.04 | −0.92 | 3.76 | −0.55 | 0.76 | 0.44 | 3.68 | 0.27 | 0.23 | 1.22 | 1.29 | −0.17 |
| Kurtosis | 7.34 | −1.16 | 12.26 | −1.72 | 1.37 | −0.44 | 19.37 | −0.69 | 0.17 | 1.30 | 1.05 | −1.07 |
Note: Correlations between dichotomous variables (e.g., DRD2 C957T risk allele, DRD2 Taq1 risk allele, combined DRD2 risk allele, and sex) and other variables were reported as Spearman’s correlation coefficients, and correlations between continuous variables were reported as Pearson’s correlation coefficients; * p < 0.05, ** p < 0.01, and *** p < 0.001. a Sex was presented as a as a percentile.