Funding Peyronie's disease: funding sources for primary research literature

The objective was to describe funding sources and publication trends for the primary literature on Peyronie's disease (PD), including direct industry research support. A search of EMBASE, PubMed, Scopus, and Web of Science was performed to identify articles published from 2006 to 2018. Articles not published in English, reviews, case reports, editorials, guidelines, and meta-analysis were excluded from analysis. Data collected included year and journal of publication, major focus, and funding sources. The US Federal Open Payments database was searched for direct industry research payments to authors. Four hundred thirty-seven articles met criteria. The median number of yearly publications was 31. The most frequent publications were Journal of Sexual Medicine (25.6%), Urology (8.9%), BJU International (7.3%), and Journal of Urology (5.7%). Plaque excision/grafting was the most common topic (16.5%) followed by pathophysiology (15.3%), and intralesional therapy (14.9%). Only 15.1% (n = 66) of articles had a funding source with only 2.3% (n = 10) articles receiving any National Institutes of Health (NIH) funding. In total, 4.1% (n = 18) of the articles were industry funded, 61.1% (n = 11) of these from Xiaflex manufacturer Endo/Auxilium. Remaining articles appeared self-funded. There were 1524 unique authors and just 13 received any direct industry funds, totaling US$718,426. Most PD research is self-funded with only a small percentage from NIH or industry.