Retrospective study of 1877 pts. W/ granulomatosis with polyangiitis (GPA) on RTX found only 23% received TMP-SMX for a median of 141 days. Prophylaxis was assoc w/ prednisone use (OR 3.96), MTX use (OR 1.48), ICU care (OR 1.95), hospitalization(OR 1.56) https://t.co/JRUC8HUwJU