Estimated prevalent count of subjects with alcohol related problems resulting from combining the six couples of flagging sources (Voghera, northern Italy, 1997)
| Sources | Number2-150 | (95% CI)2-150 |
| F1 - F2 | 1489 | (366, 2611) |
| F1 - F3 | 906 | (171, 1640) |
| F1 - F4 | 2841 | (837, 4845) |
| F2 - F3 | 311 | (153, 470) |
| F2 - F4 | 1201 | (592, 1810) |
| F3 - F4 | 714 | (339, 1090) |
↵2-150 Number of subjects with alcohol related problems, and corresponding 95% confidence intervals. Flagging sources: F1: self help volunteering groups (anonymous alcoholics and on treatment alcoholic groups); F2: Psychiatric Ambulatory; F3: Public Alcohology Service; F4: hospital discharges.