Table 3b.

Estimates^a from Six Models^b of Total Health Care Costs during the Year^c Following COMBINE Treatment Using the COMBINE Economic Study Sample (Categorical Drinking Categories)

^*p<0.05,

^**p<0.01 , N=748, Full model results showing the coefficients for these covariates are included in Appendix A.

^aEstimates are % changes in HC Costs (Incident Rate Ratios – 1) transformed from unadjusted estimates from a GLM with a log-link function and gamma distribution. Robust standard errors for adjusted and unadjusted estimates are in parentheses.

^bThe models comprise three past 30 day Heavy Drinking Day and Non-heavy Drinking Day measures. Heavy drinking days are defined as a day in which 5 or more drinks are consumed for men, 4 or more for women. All other drinking days are defined as Non-heavy Drinking Days.

^cBased on healthcare use reported from the end of COMBINE treatment through 12 months later.

^dWald tests of the null hypotheses for these tests are that the estimated coefficients are equal (Chi-sq distribution, 2 d.f.). Compared coefficients are linked with brackets.