Table 3.
Cutoff point of the C-IGDC based on the Diagnostic and Statistical Manual of Mental Disorders (DSM-5)-proposed diagnostic criteria of Internet gaming disorders (IGD) (N = 464).
| Cutoff Point (≥) | Sensitivity (%) | Specificity (%) | PPR (%) | NPR (%) | Cohen’s κ | Youden’s Index | DOR |
|---|---|---|---|---|---|---|---|
| 16 | 91.7 | 73.0 | 33.5 | 98.3 | 0.37 | 0.65 | 30.91 |
| 17 | 90.0 | 78.5 | 38.3 | 98.1 | 0.43 | 0.69 | 32.15 |
| 18 | 90.0 | 80.4 | 40.6 | 98.2 | 0.46 | 0.70 | 38.33 |
| 19 | 86.7 | 82.7 | 42.6 | 97.7 | 0.48 | 0.69 | 31.25 |
| 20 | 81.7 | 85.4 | 45.4 | 96.9 | 0.50 | 0.67 | 26.62 |
| 21 | 76.7 | 87.1 | 46.9 | 96.2 | 0.50 | 0.64 | 22.07 |
| 22 | 68.3 | 90.3 | 51.3 | 95.1 | 0.51 | 0.59 | 20.23 |
Note: Positive Predictive Rate (PPR); Negative Predictive Rate (NPR); Diagnostic Odds Ratio (DOR). The line in bold indicates the optimal cutoff score.