According to national statistics, six of the top 10 professions at greatest risk for back injury are: nurse's aides, licensed practical nurses, registered nurses, health aides, radiology technicians, and physical therapists. Greater than one third of back injuries among nurses are attributed to handling patients and the frequency with which they are required to manually move patients.
From a worldwide perspective, back injuries to nurses have point prevalence of approximately 17 percent, an annual prevalence of 40-50 percent and a lifetime prevalence of 35-80 percent. (See A Business Case for Patient Care Ergonomic Interventions, 2005). As staggering as these statistics are, they still do not tell the whole story. According to Bernice Owen, RN, Ph.D., former professor at the University of Wisconsin-Madison School of Nursing, as many as one-third of nurses who sustain work-related back injuries do not even report them. (See Caring for Ourselves, by Bernice Owen.)
From https://www.premierinc.com/safety/topics/back_injury/