The efficacy of religious and spiritual interventions in nursing care to promote mental, physical and spiritual health: A systematic review and meta-analysis

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Background: Spiritual interventions have proved to alleviate suffering, help the patient to prepare for end of life issues, improve quality of life, and well-being. Objective: This study aims to investigate the efficacy of religious and spiritual interventions in nursing care to promote mental, physical and spiritual health as compared to control groups not receiving such care. Methods: This is a systematic review and meta-analysis of clinical trials from SCOPUS, PUBMED, Web of Science and CINAHL databases. The searches were carried out between May and July 2020 without restrictions con cerning the date of publication. Peer-reviewed articles published in English, Portuguese or Spanish, focusing on nurses were included. This study followed the PRISMA guidelines. In addition, the CONSORT and The Cochrane Collaborations tool for assessing risk of bias were followed. Results: The search process identified 1308 publications, 18 randomized controlled trials were included for the systematic review and 9 for the meta-analysis. The meta-analyses revealed that spiritual interventions were associated with lower mental health symptoms (SMD = -6.91 [− 9.83,-3.98], p < 0.001, I2 = 99 %), greater well being (SMD = 1.26 [0.58, 1.93], p < 0.001, I2 = 94 %) and higher levels of spirituality (SMD = 0.48 [0.29, 0.67], p < 0.001, I2 = 31 %) as compared to individuals in the control group. Conclusions: Spiritual interventions seem to be effective to promote health, as seen for mental health, spirituality, well-being and physical outcomes. Nevertheless, more than half of the studies have a high risk of bias in any of the dimensions evaluated and there is an important heterogeneity among interventions and outcomes. This is particularly important to nurses and nurse managers who want to provide a holistic care to their patients.

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