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Trends in Web search interest for dutasteride (red) and tamsulosin (blue) on the Google search engine from 2004 through 2007. The analysis indicated that the dutasteride campaign was associated with a statistically significant change in level of searches for both “Avodart” (+31.3 %, 95 % CI: 27.2–35.4) and “Flomax” (+8.3 %, 95 % CI: 0.9–15.7). The tamsulosin campaign was associated with a significant change in search level for “Flomax” (+25.3 %, 95 % CI: 18.7–31.8).
