Table 1.

Excess medical cost difference adjusting for pre-intake cost and age

	Family Members of Abstinent AOD Patients Relative to Control Family Members		Family Members of Non-Abstinent Patients Relative to Control Family Members
Year after Intake	Cost Difference ($)	p-value	Cost Difference ($)	p-value
2	23.91	0.22	2.35	0.84
3	25.87	0.10	21.97	0.04
4	21.04	0.07	28.95	0.03
5	2.63	0.82	35.59	0.06