The purpose of this study was to examine associations between clinicians' use of varying types of spiritual interventions in the first session of spiritually integrated psychotherapies (SIPs) and clients' likelihood of returning for a second session. In total, 154 practitioners of SIPs from 33 settings in a practice-research network reported on their implementation of different methods for addressing clients' religion/spirituality on an after-session summary checklist. Roughly 80% or more of the clinicians implemented at least one spiritual intervention in the first session; on average, clinicians used 3.26 (SD = 3.66) of the interventions on the checklist. Occurring with 20% or more of the 1,094 clients, the most commonly used spiritual interventions included listening to spiritual issues, discussing compassion and hope, affirming clients' divine worth and attempts to trust God. In total, nearly one in five clients did not return for a second session. Focusing on interventions that were empirically linked with clients' engagement in a second session in bivariate analyses, discussion of spiritual dimensions of clients' problems and solutions was associated with a 118% greater probability that clients engaged in SIPs; in contrast, discussion of hope was linked with a 40% decrease in treatment engagement. In conclusion, findings highlight the potential opportunities and risks for implementing interventions that attend to clients' spirituality and/or religious faith at the start of SIPs. Research is needed to understand factors associated with the effective use of spiritual interventions and methods of training clinicians accordingly. (PsycInfo Database Record (c) 2024 APA, all rights reserved).