Influenza immunization rates in the Intermountain End-Stage Renal Disease Network (Network 15)

Area of Science:

• Nephrology
• Public Health
• Immunology

Background:

• Influenza and pneumonia are leading causes of death in the US.
• Influenza vaccination is crucial for reducing morbidity and mortality in high-risk populations.
• Current national data on influenza immunization rates for dialysis patients, based on Medicare billing, are suboptimal.

Purpose of the Study:

• To assess the accuracy of Medicare billing data for influenza immunization rates among dialysis patients.
• To determine the actual influenza immunization rate within End-Stage Renal Disease Network 15.
• To identify discrepancies between billed and actual vaccination coverage.

Main Methods:

• Analysis of Health Care Financing Administration (HCFA)/Medicare billing data.
• Collection of influenza vaccination data directly from dialysis facilities within End-Stage Renal Disease Network 15 for the 1998 flu season.
• Comparison of rates derived from billing data versus facility-reported data.

Main Results:

• HCFA/Medicare billing data indicated influenza immunization rates significantly below national targets (e.g., <60% for Healthy People 2000).
• Facility-reported data for Network 15 showed a 74.6% overall influenza vaccination rate for the 1998 flu season.
• Billed immunization rates were 26.5 to 45.6 percentage points lower than facility-reported rates.

Conclusions:

• Medicare billing data underestimates actual influenza immunization rates in dialysis patients.
• There is a need to improve influenza vaccination coverage for dialysis patients, though actual rates may be higher than previously reported.
• Accurate measurement of vaccination rates is essential for effective public health interventions.