RT Journal Article SR Electronic T1 Interpretation of genetic variants JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 295 OP 297 DO 10.1136/thoraxjnl-2013-204903 VO 69 IS 3 A1 Patrick R Sosnay A1 Garry R Cutting YR 2014 UL http://thorax.bmj.com/content/69/3/295.abstract AB Sequencing of the human genome and introduction of clinical next-generation sequencing enable discovery of all DNA variants carried by an individual. Variants may be solely responsible for disease, may contribute to disease, or may have no influence on the development of disease. Interpreting the effect of these variants upon disease is a major challenge for medicine. Although the process is still evolving, certain methods are useful in discriminating the effect of variants upon phenotype. These methods have been employed to the greatest extent in Mendelian disorders where deleterious changes in one gene can cause disease. Here, we briefly review the relative merits of these methods, with emphasis on using a comprehensive approach modelled after the analysis of variants that causes cystic fibrosis.