BMC Public Health 2005, 5:75 http://www.biomedcentral.com/1471-2458/5/75 Table 2: A comparison of our results to the results published by the official MATCH study group shows correlations between number of treatment sessions attended and drinking outcome. Percent Days Abstinent MET .0269 .0135 .0011 .0583 MET -.0969 -.0856 -.0425 -.0795 MET .107 .131 .115 .108 .157 .165 .184 .181 .140 .149 .136 .121 TSF .2678 .2666 .2657 .2162 TSF -.2832 -.2875 -.3028 -.2073 TSF .278 .301 .373 .375 .407 .373 .391 .375 .397 .378 .418 .436 Published MATCH results CBT .26 .17 .17 .11 CBT -.22 -.21 -.14 -.13 CBT -.232 -.311 -.340 -.359 -.361 -.346 -.358 -.326 -.339 -.384 -.432 -.404 MET .03 .01 .00 .06 MET -.10 -.09 -.04 -.08 MET -.150 -.183 -.152 -.131 -.183 -.156 -.209 -.203 -.175 -.154 -.156 -.160 TSF .27 .27 .27 .22 TSF -.28 -.29 -.30 -.21 TSF -.251 -.242 -.309 -.303 -.344 -.304 -.346 -.326 -.375 -.331 -.395 -.413 Drinks per drinking day Month * CBT = Cognitive Behavioral Therapy MET = Motivational Enhancement Therapy TSF = Twelve Step Facilitation Therapy Month 6 9 12 15 6 9 12 15 Week 1 2 3 4 5 6 7 8 9 10 11 12 Our results CBT* .2556 .1743 .1685 .1111 CBT -.2281 -.2112 -.1372 -.1257 CBT* .207 .279 .302 .342 .356 .371 .354 .345 .352 .400 .399 .395 Table 3: Correlations between number of treatment sessions attended and drinking during the course of the study. Percent Days Abstinent Drinks Per Drinking Day * CBT = Cognitive Behavioral Therapy MET = Motivational Enhancement Therapy TSF = Twelve Step Facilitation Therapy for both percent days abstinent (F = 4.73 (1, 130) p = .031) and drinks per drinking day (F = 4.51 (1, 130) p = .036). Next, in order to better illustrate what is happening in these data, mean drinking levels of participants who dropped out before receiving any treatment (N = 100 at baseline) is compared to those who attended all 12 ses- sions of Cognitive Behavioral or Twelve-Step Therapy (N = 355 at baseline). Also included are the anomalous group identified above, i.e., the group that dropped out after attending only one treatment session (N = 121 at baseline). We can dispense with displaying the results for groups 2 through 11 without losing any information Page 4 of 11 (page number not for citation purposes)