X and s charts for health care comparisons.
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.
Hart
Marilyn K
MK
College of Business Administration, University of Wisconsin, Oshkosh 54901, USA. hart@uwosh.edu
Robertson
James W
JW
Hart
Robert F
RF
Schmaltz
Stephen
S
D006268:Health Facilities; D006801:Humans; D007902:Length of Stay; D011785:Quality Assurance, Health Care / Q000379:methods*; D020379:Risk Adjustment; D014481:United States