Author Financial Conflicts of Interest, Industry Funding, and Clinical Practice Guidelines for Anticancer Drugs

Purpose Clinical practice guidelines (CPGs) and consensus statements (CSs) are used to apply evidence-based medicine or expert recommendations to clinical practice. Here we explore author financial conflicts of interest (FCOIs), sources of guideline funding, and their relationship with endorsement of specific drugs. Methods An electronic search of MEDLINE was conducted to identify CPGs and CSs for common solid cancers published between January 2003 and October 2013. The search was restricted to articles evaluating systemic therapy. We extracted data on self-reported author FCOIs, funding sources, use of manuscript writers, and endorsement of specific drugs in the abstract of the article. Results Of 142 articles evaluated, 64% were CPGs, and 36% were CSs. The proportion of articles reporting FCOIs improved from 11% in 2003 to 93% in 2013 (P for trend < .001). Only 45% of articles explicitly reported funding sources. Of these, 65% disclosed partial or full industry sponsorship. Use of manuscript writers was...