RT Journal
A1 Tsai S, Thomas KA
T1 Actigraphy as a measure of activity and sleep for infants: A methodologic study
JF Archives of Pediatrics & Adolescent Medicine
JO Archives of Pediatrics & Adolescent Medicine
YR 2010
FD November 1
VO 164
IS 11
SP 1071
OP 1072
DO 10.1001/archpediatrics.2010.208
UL http://dx.doi.org/10.1001/archpediatrics.2010.208
AB 
Infant sleep is a challenge among parents and a problem seen frequently in pediatric practice. Actigraphy, an activity-based sleep monitoring system, uses a wristwatch-like device with an accelerometer sensitive to body movements. Activity counts derived from actigraphy serve as the basis for sleep-wake determination. Although it has been concluded that actigraphy is a valid measure of sleep during infancy,1- 2 external motion, a common experience for infants (eg, being carried or put in an infant swing), is usually overlooked in studies that use actigraphy to assess infant sleep. In some studies, actigraphy records containing external motion were removed prior to analysis2- 3; in others, data involving external motion were included,4- 5 with most studies not specifying how such data were analyzed. The objective of this study was to assess the activity count and sleep-wake identification accuracy by actigraphy when an infant doll was exposed to external motion.