in this family study of the narcoleptic syndrome , 52 % of the probands had an affected first degree relative , 41.9 % of the sibs of those probands with an affected parent were similarly affected , 33.3 % of the parents of 2 affected sibs and 41.2 % of the children ( after a correction for age ) had narcolepsy , cataplexy , or both .
C0027404
narcolepsy
C0007384
cataplexy