The impact of a participatory intervention on the therapeutic relationship in mental health nurses: A multicentre study.

AIMS: To evaluate the effects of an intervention aimed at improving the therapeutic relationship, using the participatory-action research method, in terms of improving the quality of the nurse-patient therapeutic relationship. DESIGN: A single-group pre-post research design. METHODS: Quantitative data were collected between January 2018 and June 2019 using an online form completed by nurses from 18 mental health units (N = 95). Data were collected before and after the intervention, which consisted of the design, implementation and evaluation of strategies to improve the therapeutic relationship through participatory-action research involving nurses. The Working Alliance Inventory-Short, Interpersonal Reactivity Index, Evidence-Based Practice Questionnaire and Practice Environment Scale of the Nursing Work Index were used. The Wilcoxon rank-sum test was used together with the Spearman's correlation coefficient. Two multiple linear regressions models were constructed. RESULTS: Overall, the intervention improved the nurse-patient therapeutic relationship. In addition, the results revealed that, above all, the improvement in evidence-based practice along with a decrease in nurses' personal distress were the factors associated with the improvement of the nurse-patient therapeutic relationship. CONCLUSION: In mental health units, the therapeutic nurse-patient relationship can be improved through participatory interventions that include the implementation of evidence-based practices. IMPACT: This research examined the effects of an intervention aimed at improving the therapeutic relationship among nurses working at mental health units using participatory action research. The results show that the therapeutic relationship can be improved through participatory methods where evidence-based practice is implemented and enhanced among nurses, since a better therapeutic relationship along with reduced staff discomfort are determining factors that influence the quality of the therapeutic relationship. Institutional managers should promote participatory group interventions to enable nurses to develop evidence-based aspects of the therapeutic relationship together with expanding personal aspects and self-knowledge.