title: X and s charts for health care comparisons.
abstract: In previous articles [M.K. Hart, Qual Manage Health Care. 2004;13(2):99-119 and 2003;12(1):5-19], the author presented control charts applicable for risk-adjusted, time-ordered variables and attribute data. The present article uses Shewhart X and s charts with risk-adjusted variables data to compare length-of-stay data from several healthcare organizations. The comparisons are made on the data both before and after risk adjustment, enabling the impact of risk adjustment to be readily determined.
authors.affiliation: College of Business Administration, University of Wisconsin, Oshkosh 54901, USA. hart@uwosh.edu
authors.forename: Marilyn K
authors.initials: MK
authors.lastname: Hart
authors.forename: James W
authors.initials: JW
authors.lastname: Robertson
authors.forename: Robert F
authors.initials: RF
authors.lastname: Hart
authors.forename: Stephen
authors.initials: S
authors.lastname: Schmaltz
mesh_terms: D006268:Health Facilities; D006801:Humans; D007902:Length of Stay; D011785:Quality Assurance, Health Care / Q000379:methods*; D020379:Risk Adjustment; D014481:United States