The use of patient mix-adjusted control charts to compare in-hospital costs of care.

Journal Article (Journal Article)

We introduce a technique for patient mix-adjusting x charts and compared differences between unadjusted and patient mix-adjusted results. Our data came from coronary artery bypass graft (CABG) surgery patients at Baptist Medical Center, Oklahoma City, Oklahoma. We first developed an unadjusted x control chart to compare monthly changes in CABG surgery costs and then used a published model to patient mix-adjust our x control chart information. Before adjustment, the average log costs for three of ten months were outside the 90% control limit lines, and there was a trend toward increasing costs. After adjustment, two months had average costs outside the 90% lower control limit lines, and the trend toward increasing costs had been explained by differences in patient acuity.

Full Text

Duke Authors

Cited Authors

  • Eisenstein, EL; Bethea, CF

Published Date

  • December 1999

Published In

Volume / Issue

  • 2 / 4

Start / End Page

  • 193 - 198

PubMed ID

  • 10994484

International Standard Serial Number (ISSN)

  • 1386-9620

Digital Object Identifier (DOI)

  • 10.1023/a:1019008400263


  • eng

Conference Location

  • Netherlands