Profiling mistletoe therapy research and identifying evidence gaps: a systematic review of conditions treated, mode of application and outcomes.

Qi Qi Chen, Francesca Wright , Lorna Duncan, Alyson L Huntley*

*Corresponding author for this work

Research output: Contribution to journalReview article (Academic Journal)peer-review

Abstract

Introduction
Mistletoe has been used as a medicine since prehistoric times. Modern Western herbal practice continues to use mistletoe. This systematic review aimed to profile mistletoe therapy in research studies and to understand the gaps in the evidence to inform future research.
Methods
We used standard systematic review methodology, searching three databases (Medline, Central and Anthromed) in June 2020.
Results
The search identified 31 relevant trials, and 10 systematic reviews published between 1996 -2020. These trials comprised 14 randomised controlled trials, 15 controlled trials and 2 cohort studies. The most common country of monocentric trials was Germany. Most of the trials declared direct or indirect financial support from companies that produce mistletoe products.
All the included trials involved cancer patients, with breast cancer being the most common condition treated (n=10). Subcutaneous injections were the most common route of administration (27/31).
Quality of life was the most reported outcome. Quality appraisal of the individual trials show that there was a lack of reporting on blinding of participants and blinding of assessors. A third of the trials did not adequately describe how they dealt with
incomplete data. Recent published systematic reviews do not concur on the efficacy of mistletoe and patients’ quality of life; with the risk of bias of these publications being rated as ‘unclear’ overall There were insufficient data to conduct a novel meta-analysis on mistletoe therapy efficacy.
Conclusion
This systematic review identified gaps in mistletoe research for improving the evidence base for mistletoe therapy in supportive cancer care.
Original languageEnglish
JournalEuropean Journal of Integrative Medicine
Early online date6 Nov 2021
DOIs
Publication statusE-pub ahead of print - 6 Nov 2021

Keywords

  • systematic review
  • Mistletoe
  • clinical trials
  • Quality of life

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