The extent to which patients use and learn from drug literature writte
n at three different readability levels was examined. A two-way analys
is of variance showed an interaction effect on knowledge score between
the readability level of the leaflet and the amount of schooling subj
ects reported: persons with higher education learned most from the har
dest pamphlet and persons with the least formal education learned the
most from the easiest pamphlet. A similar interaction was found in tes
ting the likelihood that patients had read the leaflet. The results su
ggest that persons with little formal education would benefit from tea
ching materials with a readability level considerably lower than even
many ''easy-to-read'' health-teaching materials available today. Copyr
ight (C) 1997 by W.B. Saunders Company.