When hospital patients have to be readmitted soon after discharge, hospitals look bad.
A high readmission rate also can result in reduced Medicare reimbursements. But a study of spine surgery patients has found that the standard method used to calculate readmission rates is a misleading indicator of hospital quality. Loyola University Medical Center neurosurgeon Beejal Amin, MD, and colleagues found that 25 percent of the readmissions of spine surgery patients were not due to true quality-of-care issues.
Results are reported in a featured article in the February, 2013 issue of the Journal of Neurosurgery.
"We have identified potential pitfalls in the current calculation of readmission rates," Amin said. "We are working on modifying the algorithm to make it more clinically relevant."
Medicare is trying to improve patient care by penalizing hospitals with poor outcomes. One key outcomes measure is the readmissions rate. Medicare may begin to withhold reimbursements to hospitals with excessively high readmission rates.
In spine surgery, a high readmission rate can indeed reflect poorly on a hospital's quality of care if the readmissions are due to reasons such as infections, surgical complications, blood clots and failures of surgical hardware, Amin said.
But some types of readmissions are not a true indication of quality of care, Amin said. Such cases include:
Planned readmission for a staged procedure. For example, a procedure to straighten a curved spine in a scoliosis patient requires two surgeries performed in different stages.
Readmission unrelated to spine surgery. Occasionally, patients who undergo spine surgery will be readmitted within 30 days for surgery for an unrelated condition, such as a hip replacement.
Operation cancelled or rescheduled for unpreventable reasons. For example, a patient is admitted to the hospital but the spinal surgery is postponed due to an irregular heart rate. The patient is readmitted a couple weeks later for elective surgery, after the heart rhythm is controlled.
Amin and colleagues examined the records of 5,780 spine surgery patients treated at the University of California San Francisco Medical Center between October, 2007 and June, 2011. (Before joining Loyola, Amin did a clinical fellowship in complex spine surgery at UCSF under Dr. Praveen Mummaneni. Currently, Amin is an assistant professor in the Department of Neurological Surgery at Loyola University Chicago Stritch School of Medicine. His clinical expertise is in minimally invasive and complex spine surgery.)