- July 2, 2012: An error came to light in the equation for approximating splines in age for M and L for FEV1 in females. Similarly a typo was found in the coefficient for p2 for FEV1/FVC for African American females. People are advised to download the updated lookup file. Apologies for the inconvenience.
- August 30, 2012: Error in c4 for FEV1 in males: old value -220.3631, corrected value -109.6777.
- November 15, 2012: Minor inconsistencies redressed.
- January 31, 2013: An error was spotted (lookup table) in the equation for deriving Lspline for FEV1/FVC in males.
- March 5, 2013: Calculating Mspline and Sspline for FEF25-75% in males led to in accurate results (corrected). In the process slight changes occurred in the lookup table for Mspline and Sspline.
- April 7, 2013: Cosmetic changes, no coefficients have been changed.
- May 3, 2013: Implementation document updated, the text referred to an obsolete lookup table.
- January 22, 2013: Error in last column of table E2 corrected: coefficients should be 0.
- April 7, 2013: Constants in table E4 now consistent with lookup tables.
GLI-2012 Desktop Software for Individual Calculations
- August 20, 2012: Whereas the pictogram displayed correct values, an error occurred in the numeric output of FEV1/FVC.
- October 9, 2012: When selecting FEF25-75% via Preferences, no output was generated. Corrected 9 Oct. 2012.
- November 15, 2012: Added the facility to specifcy VC as IVC, SVC or FVC.
- December 10, 2012: Fixed a small issue with printed output.
- March 26, 2013: Fixed an issue with FEF25-75% in males.
- December 18, 2013: Fixed an issue with an inconsequential error message.
GLI-2012 Desktop Software for Large Data Sets
- Calculation of SD could go wrong in previous version.
- Added facility for deriving FEF75% constants for new group.
- March 26, 2013: A bug in the polynomial equations and lookup table for FEF25-75% in males.
- March 2014: R macro was updated to include percent predicted for all of the outcomes.
- April 2013: SAS macro was updated to be consistent with the updated look-up tables.
Click here for information about applicability of GLI-2012 equations (indices, age range, ethnicity, countries covered) or here for validation studies of the GLI-2012 equations and impact if implementation on clinical interpretation of measurements.