The Quanjer GLI-2012 regression equations for spirometric indices arose from the work of a Task Force of the European Respiratory Society. Their report has been endorsed by the European Respiratory Society (ERS), American Thoracic Society (ATS), Australian and New Zealand Society of Respiratory Science (ANZSRS), Asian Pacific Society for Respirology (APSR), Thoracic Society of Australia and New Zealand (TSANZ) and the American College of Chest Physicians (ACCP).
The Task Force (Global Lung Function Initiative, GLI) summarised the regression equations and lookup tables, required for implementation into software, in an Excel file. The GLI group also produced tools for calculating predicted values, their lower limits of normal and the z-scores of measured indices, as well as facilities for analysing datasets. The tools are accessible via the menu on the left. By law the use of the GLI software packages is restricted to research, education, training and validation of implementation in software; they are not to be used in patient treatment.
It is recommended to regularly check for updates and bug fixes.