The study linked Medicare claims data to the nationally representative physician survey conducted by HSC.
Researchers found that 57 percent of Medicare outpatient visits were to physicians in practices that used IT for no more than one of the following five clinical functions: obtaining treatment guidelines, exchanging clinical data with other physicians, accessing patient notes, generating preventive treatment reminders for the physicians use and writing prescriptions.
Access rates across individual clinical IT functions varied considerably.
While half of Medicare outpatient visits were to physicians in practices using IT to obtain treatment guidelines, the proportion of visits to physicians in practices with IT support for other patient care functions was much lower, falling to 9 percent for electronic prescribing.
Physician IT usage varied little according to the relative health, or lack thereof, of patients or by the race of patients.