Objective. This report examines the response of families to the Americ
an Academy of Pediatrics June 1992 recommendation that healthy term in
fants be put to sleep on their back or side to decrease the risk of su
dden infant death syndrome. Parents at two clinics and private practic
es were interviewed to ascertain sleep position practices. Methods. Pa
rents of infants from 1 to 6 months of age who were in the waiting roo
m for a well-child visit were eligible for study. A total of 760 inter
views were conducted using a closed-ended questionnaire. Parents were
asked about sleep position, positional changes during sleep, and facto
rs that influenced their decision to position their infant prone, side
, or supine. Interviews were conducted from September 1993 through Apr
il 1994. This interval was divided into two equal, 4-month time interv
al. Sleep practices were compared during the first and second time per
iods. Differences between practice and clinic groups were measured. Gr
oups were compared using the chi-square test, with results considered
significant at P <.05. Results. The number of infants placed side or s
upine for sleep increased significantly since the inception of the stu
dy, from 38.1% to 59.1%. Despite this increase, parents reported that
the impetus for changing position came from family or the media, rathe
r than from health professionals. Initially, the proportion of infants
in private practices placed side or supine was greater than that of c
linic patients. That difference disappeared by the end of the study. P
rone positioning continued to be more prevalent in the 3- to 6-month-o
ld infants than in the 1- to 8-month-old group. The majority of infant
s at all ages awoke in the same position that they were put to sleep.
Conclusions. Side and supine positioning for sleep increased in all so
cioeconomic groups. A small number of infants placed side or supine fo
r sleep are found prone on awakening. Health professionals need to inc
rease their role in providing sleep position guidance. As the proporti
on of the population positioning their infants side or supine for slee
p increases, it should be possible to examine the effect on the sudden
infant death syndrome rate.