What Researchers Did
Researchers systematically reviewed 17 systematic reviews, synthesizing 44 randomized trials and 131 observational studies, to apply the Grading of Evidence, Assessment, Development and Evaluation (GRADE) approach to hyperbaric oxygen therapy indications.
What They Found
They found that among 17 systematic reviews synthesizing data from 8,145 participants across 44 randomized trials and 131 observational studies, the quality of evidence varied significantly.
For 7 indications with category A, evidence quality ranged from high (1) to very low (2), while for 10 indications with category B, it was mostly low (5) or very low (4), revealing limitations not captured by the American Heart Association system.
What This Means for Canadian Patients
Canadian patients considering hyperbaric oxygen therapy should be aware that the quality of evidence supporting various indications can be quite low or very low, despite existing recommendations.
This means that treatment decisions for conditions like decompression illness or carbon monoxide poisoning may rely on evidence with significant limitations, prompting careful discussion with their healthcare provider.
Canadian Relevance
This study has no direct Canadian connection.
Study Limitations
The study's reliance on existing systematic reviews means its findings are constrained by the quality and scope of those previously published analyses.