Table 3.
Comparison of CHAT With Reference Standards: Sensitivity and Specificity
| Condition | % Sensitivity (95% CI) | Positive CHAT Responses/ Positive Reference Standard | % Specificity (95% CI) | Negative CHAT Responses/ Negative Reference Standard |
| Nicotine dependency | 88 (77–95) | 38/51 | 91 (89–93) | 61/704 |
| Problematic drinking | 80 (70–87) | 67/84 | 85 (82–87) | 101/662 |
| Problematic drug use | 64 (39–84) | 9/14 | 98 (97–99) | 3/736 |
| Problematic gambling | 80 (38–99) | 4/5 | 98 (97–99) | 13/683 |
| Major depression | 98 (86–100) | 30/30 | 73 (70–76) | 191/707 |
| Anxiety | 85 (75–92) | 58/68 | 77 (73–80) | 155/660 |
| Being verbally abused | 57 (33–79) | 8/14 | 97 (96–98) | 16/580 |
| Being verbally angry | 77 (50–92) | 10/13 | 92 (89–94) | 47/581 |
CHAT=Case-finding and Help Assessment Tool; CI = confidence interval.