Excessive substance use did not differ significantly between patients whose physicians were in the intervention group and those whose physicians were in the control group at any of the follow-up points ( odds ratio -LSB- OR -RSB- and @ % confidence interval -LSB- CI -RSB- at @ months : @ -LSB- @-@ @ -RSB- ; at @ mo : @ -LSB- @-@ @ -RSB- ; and at @ mo : @ -LSB- @-@ @ -RSB- ) .