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Journal of the American Society of Nephrology, Vol 4, 1021-1027, Copyright © 1993 by American Society of Nephrology
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JC Hornberger
Division of Health Services Research, Health Research & Policy and Medicine, Stanford University School of Medicine 94305-5093.
Case-mix adjusted mortality rates for patients undergoing hemodialysis for ESRD increased during the 1980s, despite the introduction of advanced dialysis technologies. Variations in dialysis practices suggest that excess mortality may be caused by inadequate uremic-toxin clearances. Cost-effectiveness analysis was used to assess whether attempts to improve uremic-toxin clearance are cost effective, assuming that these therapies are clinically effective. The medical literature was surveyed by the use of MEDLINE to assess the likelihood of clinical outcomes on the basis of the type of treatment given to the patient. Options considered in the model were delivered fractional urea clearance (Kt/V), dialysis-treatment duration, type of dialyzer membrane, dialysate, and ultrafiltration. Clinical outcomes included in the model were survival, severity of uremic symptoms, hospital days per year, and intradialytic hypotension and symptoms. Lifetime costs were calculated from data collected from a northern California dialysis center and abstracted from the literature. In the base-case scenario, it was assumed that increasing Kt/V to levels greater than 1 was effective in reducing morbidity and mortality. Under these assumptions, outpatient cost increased significantly, but the cost effectiveness of Kt/V equal to 1.5 was less than $50,000 per quality-adjusted life-year saved. These calculations indicate that, if higher levels of Kt/V prove clinically effective, they are also cost effective.
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