Nurses seem to have a high prevalence of back pain and disability. Understandably, employers want to avoid having to pay mega-dollars for back care for so many of their workers.
Studies clearly show that a previous history of back pain is a risk factor for future episodes of back problems. A recent study of nursing students and nurses from Finland shows a direct link between nursing students with back pain (before they ever treated patients) and future disability from back pain.
Pre-employment screening is to protect the hiring agency before a problem develops. Pre-nursing school screening may be next.