Evidence-based techniques have been increasingly used in the creation of clinical
guidelines and the development of recommendations for medical practice. The use
of levels of evidence allows the reader to identify the quality of scientific
information that supports the recommendations made by experts. The objective of
this review was to address current concepts related to the clinical impact,
diagnosis, and treatment of Pseudomonas aeruginosa infections
in patients with cystic fibrosis. For the preparation of this review, the
authors defined a group of questions that would be answered in accordance with
the principles of PICO–an acronym based on questions regarding the Patients of
interest, Intervention being studied, Comparison of the intervention, and
Outcome of interest. For each question, a structured review of the literature
was performed using the Medline database in order to identify the studies with
the methodological design most appropriate to answering the question. The
questions were designed so that each of the authors could write a response. A
first draft was prepared and discussed by the group. Recommendations were then
made on the basis of the level of scientific evidence, in accordance with the
classification system devised by the Oxford Centre for Evidence-Based Medicine,
as well as the level of agreement among the members of the group.