Healthy Skepticism Library item: 5973

Warning: This library includes all items relevant to health product marketing that we are aware of regardless of quality. Often we do not agree with all or part of the contents.

Publication type: Journal Article

Liss H.
Publication bias in the pulmonary/allergy literature: effect of pharmaceutical company sponsorship.
Isr Med Assoc J 2006 Jul 01; 8:(7):451-4

Abstract:

BACKGROUND: A publication bias exists towards positive results in studies funded by pharmaceutical companies. OBJECTIVES: To determine whether drug studies in the pulmonary/allergy literature also demonstrate a publication bias towards more favorable results when a pharmaceutical company funds the study. METHODS: We reviewed all original articles published in seven pulmonary and allergy journals between October 2002 and September 2003. Included in the review were studies of inhaled corticosteroids (oral or nasal), long- or short-acting bronchodilators, or leukotriene receptor antagonists. Articles with funding from a pharmaceutical company and/or one or more authors employed by a pharmaceutical company were considered pharmaceutical company-sponsored studies. The remaining studies were considered not sponsored by a pharmaceutical company. Results were compared to ascertain whether positive results were obtained more frequently in the company-sponsored studies. RESULTS: Of the 100 articles included in this review 63 were considered pharmaceutical company-sponsored research. Results favorable for the drugs studies were significantly more common in those funded by a pharmaceutical company (98% vs. 32%). CONCLUSIONS: In the pulmonary and allergy literature, as in other fields, there is a publication bias towards positive results in pharmaceutical company-sponsored research.

Keywords:
Clinical Trials/economics* Drug Industry/ethics* Humans Hypersensitivity/drug therapy Lung Diseases/drug therapy Periodicals* Publication Bias/statistics & numerical data*