6th Edition of World Nursing Science Conference 2026

Abstract

The trans-theoretical model (TTM) is a popular framework for guiding behavioral interventions in substance use disorders. However, the optimal duration and intensity of these interventions are not yet known. This study used the GRADE approach and a dose-response meta-analysis to confirm the robustness of the evidence and to evaluate the effectiveness of TM-based educational interventions for drug discontinuation. In line with the PRISMA 2020 guidelines, systematic searches have been carried out in the databases PubMed, Scopus, the Web of Science and Embase until August 2025. Randomized controlled trials (RCTs) evaluating interventions based on TTM-based drug discontinuation were included in the quality of evidence assessment using the GRADE tool. A meta-analysis of dose responses was conducted to investigate the relationship between duration of treatment (weeks) and efficacy at the end of treatment. Of the 947 identified studies, 50 randomized controlled trials (RCTs) involving 9,245 participants met the inclusion criteria. Pooled analysis showed that TTM interventions significantly improved the rate of discontinuation compared with standard care (risk ratio [RR]: 1.58; 95-CI: 1.21-2.06; P<0.001), with modest heterogeneity (I2 = 55). The dose-response analysis revealed a significant non-linear relationship (Pnon−linearity<0.01); interventions showed a steep increase in efficacy up to 12 weeks and reached a plateau after 24 weeks, whereas brief interventions (<4 weeks) showed limited effects. Analyses of the dose response revealed a significant non-linear relationship (Pnon−linearity<0.01) with a rapid increase in efficacy up to 12 weeks and plateau after 24 weeks, while short-term treatment (less than 4 weeks) had limited effect © 2025 Published by Public Knowledge Project (PKP).
Keywords: Transtheoretical Model (TTM), Drug Cessation, Health Education, Dose-Response Meta-Analysis, GRADE Assessment.