Table 3.
Cost-effectiveness analysis
| Treatment | Mean cost (C) | Decrease in average drinks |
Decrease in heavy drinking days |
||
| Mean effectiveness (E) | ICER (∆C/∆E) | Mean effectiveness (E) | ICER (∆C/∆E) | ||
| AO | $– | −0.003 | – | 1.288 | – |
| (0.024) | (0.039) | ||||
| MI | $16.51 | 0.286 | Economically | 1.354 | Economically |
| (0.38) | (0.023) | dominated | (0.040) | dominated | |
| FB | $17.33 | 0.360 | Economically | 1.475 | Economically |
| (0.46) | (0.022) | dominated | (0.040) | dominated | |
| MIFB | $36.03 | 0.769 | $47.04 | 1.848 | $64.34 |
| (0.56) | (0.026) | (0.044) | |||
Notes: Standard error of estimate in parentheses. All costs are in 2009 U.S. dollars. An economically dominated intervention either is more expensive and less effective than another or has a higher calculated incremental cost-effectiveness ratio (ICER) than the next most expensive. Economically dominated interventions were removed from consideration in the analysis. AO = assessment only; MI = motivational interviewing; FB = feedback only; MIFB = motivational interviewing with feedback.