The Total Number Of Clinical Trials

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The total number of clinical trials in Portugal has recently experienced a reduction in a
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13 worrying trend revealing a significant loss of competitiveness in this field. Between 2006 and
14 2012 the number of trials decreased by 26%, i.e. from 160 to 118 studies. The trough in these
16 numbers only arrived in 2011, when just 88 studies took place. This trend shall only either
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18 prevent or hinder the achievement of social and/or political benefits, such as the improvement
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20 of medical and supportive care, job creation, the organization of health facilities and early
21 access to innovative medicines and research methodologies 1. The reasons for this decrease
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23 stem from numerous aspects, including the cost and difficulties of attracting volunteers to
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25 participate in such studies.
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28 The effectiveness of a clinical trial depends on the size of its sample, sample homogeneity,
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30 the similarity of the results and the differences among the mean values for each group. In this
31 kind of study, it proves very difficult to achieve the minimum participant numbers required to
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33 obtain the ideal sample size. This situation occurs for various reasons including the study cost,
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35 the low frequency of certain diseases, uncertainty about the effects of treatment, and among
36 others 2.
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40 Considering this framework, certain actions might be implemented in order to reverse this
41 scenario. Some techniques and marketing strategies
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