HIPAA. KS is fully compliant with HIPAA standards. S-TOFHLA. An abbreviated version of the test of functional health literacy in adults, the S-TOFHLA is widely used by health care providers to determine the adequacy of their patients' understanding of health care materials needed for their health care or education, as well as by researchers to assess health literacy as a variable in research. It categorizes individuals as having adequate, marginal or inadequate health literacy, can be administered in 12 minutes, and has been used in patients with a variety of chronic diseases.