Treatment Fidelity of a Randomized Controlled Trial for Suicidal Risk

Treatment fidelity is a crucial consideration within randomized controlled trials (RCTs). The present study relies on data from a feasibility RCT conducted with 62 treatment-seeking suicidal college students. Issues of experimental fidelity were germane in this investigation because the same clinicians provided both the experimental (the Collaborative Assessment and Management of Suicidality—CAMS) and the control (treatment as usual—TAU) care. The first aim of the current study was to determine adherence to the CAMS model within the experimental (CAMS) and control (TAU) treatment conditions. A second exploratory aim was included to examine how treatment fidelity impacted treatment outcomes (i.e., depression, suicidal ideation, hopelessness, and potential treatment moderators). The CAMS Rating Scale (CRS.3-R) was used to determine treatment adherence to the CAMS model and to ensure between-group fidelity within the trial. The CRS.3-R was completed throughout the course of care based on reviews of a selected number of video recordings of both CAMS and TAU sessions to measure treatment fidelity. Mean CRS.3-R scores revealed differences across treatment conditions such that clinicians were successfully able to provide each treatment separately without contamination. Further, higher CRS.3-R scores in CAMS sessions resulted in decreased hopelessness over the treatment period. Higher CRS.3-R scores in TAU sessions resulted in an increased likelihood of suicidal ideation and less reduction in hopelessness over the treatment period. Overall, clinicians can serve as their own controls in a RCT and levels of adherence to the CAMS model have different effects on suicidal ideation and hopelessness.