Table 1.
Item statistics for the YFAS
| Criteria and items of the YFAS | Mean (SD) | Item total correlation |
|---|---|---|
| Criterion A: Tolerance | ||
| Item 20 | 0.09 (0.28) | 0.42 |
| Item 21 | 0.19 (0.39) | 0.40 |
| Criterion B: Withdrawal | ||
| Item 12 | 0.02 (0.13) | 0.53 |
| Item 13 | 0.07 (0.25) | 0.52 |
| Item 14 | 0.08 (0.27) | 0.57 |
| Criterion C: Substance often taken in larger amounts or over a longer period than was intended | ||
| Item 1 | 0.09 (0.28) | 0.58 |
| Item 2 | 0.12 (0.32) | 0.51 |
| Item 3 | 0.04 (0.20) | 0.62 |
| Criterion D: Persistent desire or unsuccessful effort to cut down or control substance use | ||
| Item 4 | 0.12 (0.32) | 0.51 |
| Item 22 | 0.59 (0.49) | 0.34 |
| Item 24 | 0.57 (0.50) | −0.02 |
| Item 25 | 0.25 (0.44) | 0.50 |
| Criterion E: Spending a great deal of time in activities necessary to obtain the substances, use the substance, or recover from its effects | ||
| Item 5 | 0.13 (0.33) | 0.48 |
| Item 6 | 0.06 (0.23) | 0.29 |
| Item 7 | 0.05 (0.22) | 0.48 |
| Criterion F: Giving up social, occupational, or recreational activities because of substance use | ||
| Item 8 | 0.05 (0.22) | 0.66 |
| Item 9 | 0.04 (0.19) | 0.72 |
| Item 10 | 0.04 (0.20) | 0.55 |
| Item 11 | 0.04 (0.20) | 0.47 |
| Criterion G: Continuing substance use despite physical or psychological problem | ||
| Item 19 | 0.20 (0.40) | 0.49 |
| Significant distress | ||
| Item 15 | 0.10 (0.30) | 0.68 |
| Item 16 | 0.03 (0.17) | 0.66 |