DOI: 10.1136/bmj.39376.447211.BE

124 meta-analyses were included in the study, 49 (40%) of which had financial ties to one drug company.

Although financial ties to one drug company were not associated with favorable results, these ties were the only characteristic significantly linked to favorable conclusions (4.09, 1.30 to 12.83). When controlling for other characteristics of meta-analyses in multiple logistic regression analyses, those with financial ties to a drug company were more likely to report favorable conclusions.

Conclusion:

Meta-analyses on antihypertensive drugs with financial ties to a single drug company are not associated with favorable results but are linked to favorable conclusions.