Holzapfel S, Schemer L, Riecke J, et al. - Psychological methods to chronic pain cannot advance toward the often called-for “tailored approaches” as there is limited information concerning treatment predictors. Researchers herein examined how avoidance behavior based on behavioral observation could yield additional predictive information. In this study, pretreatment self-report and behavioral measures were evaluated as predictors of treatment outcome for 43 patients experiencing disabling chronic low back pain, who participated and received 10 to 15 sessions of exposure treatment in a randomized controlled trial. Some preliminary evidence was gained indicating that pretreatment avoidance behavior might be suggestive of a decrease in global disability following exposure treatments in patients experiencing disabling chronic low back pain and raised fear avoidance. Through a BAT-Back score of > 22 for Pain Disability Index, classification and regression trees divided subgroups in whom benefit might be achieved from exposure treatment.