Efficacy
This study found that the PPKAY had a self-reported positive impact on the behavior of all participants. While this trial was not powered to determine an effect size, we were able to see a signal of change among the intervention groups. Hence, we are optimistic of the impact of this intervention, especially given the overwhelmingly positive feedback we received about the patient acceptability of the intervention and preliminary findings. Given our preliminary efficacy findings, there is a strong potential in a longer-term intervention to reduce alcohol-related harms in the Tanzanian injury population.Previously, studies examining the feasibility and efficacy of SMS message boosters in BIs for alcohol use have taken place in HICs [