Of concern is that the mean scores in the control group
dropped. It is possible that this outcome was related to the
reliability of the workstation checklist. However, it also is
possible that members of the control group attempted to
change their workstations in the absence of professional
assistance, resulting in workstation design and body positioning
that were poorer than before. All participants received
the study intervention after completion of the posttests to
ensure that all employees were treated equally. Finally, some