The value of a patient global assessment of disease activity in granulomatosis with polyangiitis (Wegener's)
Granulomatosis with Polyangiitis
Severity of Illness Index
PtGA-PhGA discordance is common in GPA. A rise in the PtGA disease activity score during times defined by physicians as periods of remission is associated with subsequent occurrence of disease relapse. These findings support the addition of PtGA as an outcome measure for GPA.