Enrollment status
Figure 2 diagrams the enrollment history and subsequent retention
status of volunteers. To date, 127 volunteers have enrolled
in the study and received a dosimeter device. Of these 127 volunteers,
16 left employment, and 23 exited the study. At the time
of this writing, 66 of the remaining 88 volunteers were actively
downloading during their work shifts, while 22 were not downloading
currently for a number of reasons including temporary
layoff and illness.