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  • Title: Publication bias in the pulmonary/allergy literature: effect of pharmaceutical company sponsorship.
    Author: Liss H.
    Journal: Isr Med Assoc J; 2006 Jul; 8(7):451-4. PubMed ID: 16889157.
    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.
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