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Updated: Jul 18, 2026

A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
Published on: September 20, 2019
[How participation in a clinical trial affects doctors' choice of treatment]
Morten Andersen1, Jakob Kragstrup, Jens Sørensen
1Syddansk Universitet, Forskningsenheden for Almen Praksis i Odense. mandersen@health.sdu.dk
Abstract:
In a retrospective cohort study, the effects of participation in a company-sponsored clinical trial on asthma drug prescribing were investigated. Ten trial-conducting practices were compared with 165 control practices. Conducting the trial did not influence guideline adherence measured as the prevalence of inhaled corticosteroid use among users of inhaled beta2-agonists. However, participation in the trial led to an increased preference for sponsor's drugs.
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