The forced vital capacity (FVC) is a key measure for monitoring disease progression in patients with ALS and often used for medical decision-making (e.g. initiation of volume recruiting techniques or NIV). Importantly, study participants are commonly selected based on their FVC. Correct standardization of the FVC is, therefore, essential for both clinicians and researchers. The global lung function 2012 equations (GLI-2012) are the most recent reference values and may improve the value of FVC measurements for ALS patients.1 Nevertheless, due to the non-linear spline functions, the GLI-2012 is difficult to calculate by hand and implement in daily practice.2
This tool calculates the predicted FVC based on age, race, gender and height using the GLI-2012 reference values.