During 1 year of the baseline period, a total of 764 MSD
cases were reported among the 102 work units. Of those, 435
cases (56.9%) involved the back, and the remaining 329 cases
(43.1%) affected body parts other than the back. Other body
parts included shoulder, upper and lower extremities, head,
neck, trunk, and multiple body injuries that did not involve
the back. Since the interventions were predominately
targeted to reduce back injuries, the change in back injury
rates was compared to the change in rates of injury to other
parts of the body. Table III presents the median MSD rates by
affected body part as well as the number of work units with
decreased or no change and increased MSD rates by affected
body part. Decreases in back MSD rates and other MSD rates