HCAHPS Survey Results: Impact of Severity of Illness on Hospitals' Performance on HCAHPS Survey Results.

BACKGROUND: The Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) survey is used by the Centers of Medicare and Medicaid (CMS) to assess inpatient satisfaction. HCAHPS survey results are publicly reported, and performance began to affect CMS reimbursement to hospitals as of FY2013. However, the impact of severity of illness on patients' self-reported inpatient satisfaction as measured by HCAHPS survey scores remains unknown.
OBJECTIVE: To determine the impact of severity of illness on patients' self-reported inpatient satisfaction.
DESIGN: The All Patient-Refined, Diagnosis Related Group (APR-DRG) classifies every patient into one of four levels of severity of illness. We evaluated the impact of APR-DRG severity of illness on five HCAHPS domains, two reputation and two environmental questions, using linear regression analysis.
SETTING: Adult inpatients discharged from a large, academic, tertiary care hospital. PATIENTS: 37,223 patients' HCAHPS survey data were combined with their APR-DRG severity of illness rating over a 39-month period between April 2008 and June 2011. MEASUREMENTS: HCAHPS scores.
RESULTS: Higher severity of illness was consistently and inversely associated with lower patients' self-reported perception of inpatient hospital satisfaction as measured by HCAHPS scores. For each one-unit increase in severity of illness, the average HCHAPS scores across all five domains were approximately 3 percent lower.
CONCLUSIONS: Hospitals treating patients with a higher severity of illness will have lower HCAHPS scores, potentially leading these hospitals to receive lower reimbursement from CMS. Conversely, hospitals with lower severity of illness will receive greater reimbursement. Failure to adequately adjust for severity of illness is a serious flaw in the current HCAHPS reporting system that should be corrected.