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.