What Researchers Did
Researchers conducted a randomized controlled trial involving 360 patients with subjective tinnitus to evaluate the therapeutic effect of two different hyperbaric oxygen (HBO2) treatment protocols.
What They Found
Among 360 patients, 12 (3.3%) achieved complete remission, 122 (33.9%) experienced lessened intensity, and 44 (12.2%) noted agreeable changes in noise characteristics. There was no statistically significant difference between the two HBO2 protocols (p > 0.05), but positive patient expectations were associated with higher reported improvement (60.3% vs 47.2% for indifferent and 19% for negative expectations).
What This Means for Canadian Patients
Canadian patients considering HBO2 for tinnitus should understand that while some may perceive improvement, complete remission is uncommon, and the therapy's overall objective efficacy is not well-established. Patient expectations appear to significantly influence perceived outcomes, suggesting a role for psychological factors in treatment results.
Canadian Relevance
This study has no direct Canadian connection as it was conducted internationally.
Study Limitations
The study's primary limitation is its reliance on subjective patient-reported outcomes, which are susceptible to psychological influences like pre-treatment expectation.