Cognitive Behavioral (CBT) % .68 .64 .74 .68 .50 .79 .78 .73 .77 .77 .74 .83 .85 Cognitive Behavioral (CBT) % 6.54 8.22 6.03 9.25 7.74 3.78 7.30 5.90 4.70 5.04 6.14 4.50 3.23 .69 .61 .69 .63 .76 .69 .82 .72 .63 .78 .86 .85 .87 7.42 8.66 6.55 7.37 4.78 6.62 4.19 6.50 6.00 5.69 3.72 2.97 3.18 Twelve-Step Facilitation (TSF) % 0 1 2 3 4 5 6 7 8 9 10 11 12 0 1 2 3 4 5 6 7 8 9 10 11 12 Note: Means were calculated for total sample available at follow-up. * Not calculated since MET was restricted to 4 sessions Table 5: Drinks per drinking day at follow-up. Total Number of Sessions Participant Received Therapy Note: Means were calculated for total sample available at follow-up. * Not calculated since MET was restricted to 4 sessions because of the linear relationship between number of treatment sessions and drinking level shown in Tables 2 and 3. Scores for these other groups, who attended between 2 and 11 treatment sessions, fell in a linear manner between the 0 and the 12 session groups (as shown in Tables 4 and 5 and the Additional File 1). There was no relationship between membership in the groups (0, 1 or 12) and inpatient or outpatient status (Chi square = .06 (2) p = .966) or gender (Chi square = .43 (2) BMC Public Health 2005, 5:75 http://www.biomedcentral.com/1471-2458/5/75 Table 4: Percent days abstinent at follow-up. Total Number of Sessions Participant Received Therapy Twelve-Step Facilitation (TSF) % Motivation Enhancement (MET) % .75 .70 .73 .72 .77 Motivation Enhancement (MET) % 7.71 5.98 6.91 5.96 4.71 Mean of All .72 .64 * * * .72 .80 .73 .70 .78 .80 .84 .86 7.32 7.84 * * * 5.65 5.51 6.19 5.35 5.40 4.95 3.78 3.21 Mean of All p = .805). However there was a strong relationship with treatment site (Chi square = 93.90 (20) p < .0001). Some sites had larger number of participants dropping out before treatment, some had larger numbers dropping out after one treatment, and some had larger numbers attend- ing the full 12 sessions. Some of this difference may have been due to different procedures at different sites, some may have been due to characteristics of the therapists or participants. Page 5 of 11 (page number not for citation purposes)