We performed a retrospective multicenter chart review to compare the effica
cy and tolerance of plasma exchange (PE) and intravenous immunoglobulin (IV
Ig) in treatment of 54 episodes of myasthenic crisis. After adjustment for
other variables, PE (compared with Mg) was associated with a superior venti
latory status at 2 weeks (partial F = 6.2, p = 0.02) and 1 month functional
outcome (partial F = 4.5, p = 0.04). However, the complication rate was hi
gher with PE compared with IVIg (13 versus 5 episodes, p = 0.07).