Background
Allergy-related illness impacts millions of individuals worldwide. Our objectives were to characterize current trends of clinical trials research relating to allergen immunotherapy and to describe the landscape of allergen immunotherapy in National Institutes of Health (NIH)-supported research inquiry.
Methods
On ClinicalTrials.gov, the following terms were searched: allergen immunotherapy OR allergy immunotherapy. Variables, including completion status, dates, design, study population, funder, location, and allergen were recorded. The NIH Research Portfolio Online Reporting Tools (RePORTER) system was also used to gather relevant variables.
Results
A total of 372 clinical trials met inclusion criteria. The proportion of industry-funded clinical trials has declined over 15 years. There has been a slow decline in pollen allergy immunotherapy research, with an increase in both food and animal allergy immunotherapy research. Otolaryngologists comprised only 6.4% of clinical trials principal investigators (PIs). There was a total adjusted NIH funding of $74,986,125 for the 118 total funding years.
Conclusion
Despite an immense interest in allergen immunotherapy, this analysis demonstrates that otolaryngologists represented a small proportion of PIs leading associated clinical trials and basic science inquiry. The proportion of trials with industry sponsorship has declined considerably in recent decades. These trends could help direct future resource allocation for allergen immunotherapy.
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