This study carries out a descriptive and comparative analysis of the various types of cystic fibrosis severity scores described in the literature and contextualizes the origin and objective of each. A total of 16 scoring systems were found: 8 are used predominantly for clinical evaluation, 5 for radiographic findings, 2 for tomographic findings and 1 for scintigraphic findings. Despite the criticism and controversy regarding these instruments of assessment, they have contributed to a better understanding of the disease and to the development of more effective therapeutic procedures.

Keywords: Severity of illness index. Cystic fibrosis. Review literature.