The 2001 study investigating brand influence on generic drug prescriptions across six health centers found that physicians' prescribing behavior was significantly affected by brand recognition, even when generic equivalents were available. The study revealed that despite the cost advantages of generics, brand loyalty and perceived efficacy led to a preference for branded medications. This effect varied among the health centers, influenced by factors such as physician experience, patient demographics, and local prescribing policies. The findings highlighted the need for targeted interventions to promote generic prescribing to reduce healthcare costs without compromising treatment quality. However, specific quantitative results, such as the percentage difference in generic versus brand prescriptions or the magnitude of influence, were not detailed in the summary available.