Incremental Cost-Effectiveness Analyses: Alcohol Outcomesa.

Abbreviations: SI, NIDA's Standard Intervention; WWE, SI plus Well Woman Exam; 4ES, SI, WWE plus four educational sessions; ICER, incremental cost effectiveness ratio, which is the difference in cost divided by the difference in effectiveness as compared with the next least costly intervention, and indicates cost per additional outcome achieved; BL, baseline; D, dominated, which indicates that the intervention is more costly and less effective than the alternative.aCosts from Ruger et al., 2010. Due to rounding, calculations may not exactly reflect data from Table 2. ICERs did not need to be adjusted because the intervention has a sufficiently long follow up time period.bPositive number indicates incremental improvement. Each value is the difference of the differences from Table 2.cTotal number of alcoholic drinks, past 7 days.dMean number of alcoholic drinks per day, of the days participants drank alcohol, past 7 days.eProportion of participants avoiding heavy drinking, past 7 days. “Heavy drinking” defined as ≥4 drinks per day of the days participants drank alcohol.fProportion of participants abstaining from alcohol, past 30 days.gPast 7 days.hPast 7 days. “Heavy drinker” includes participants who drink ≥4 drinks per day of the days participants drank alcohol.iPast 30 days.