The primary investigator calculated
total sleep time by matching the
documented daily diary report of bedtime
and morning waking times with
the actigraph data. The software-produced
graphs document activity/sleep
patterns using downloaded data from
the actigraph score watch for each
day (24-hour time period) the adolescent
wore the actigraph-score watch.
During the analysis of this information,
the calculation of the sleep
parameters was set to start 10 minutes
before bedtime and 10 minutes before
morning waking time for each adolescent