Spirometry changes over the course of the study.
The diagram illustrates individual plots and natural progression in spirometry for each subject, along with summary plots, divided into ERT and non-ERT groups. This was conducted for each of the following spirometry variables: (A) FEV1, (B) FEV1[%Pred], (C) FVC, (D) FVC [%Pred], (E) FEV1/FVC) and (F) 6MWT. Note, when values are averaged out for both the ERT and non-ERT group, there is global decline in spirometry values over the course of the study.