PMID- 9449942
OWN - NLM
STAT- MEDLINE
DCOM- 19980223
LR  - 20220330
IS  - 0895-4356 (Print)
IS  - 0895-4356 (Linking)
VI  - 50
IP  - 12
DP  - 1997 Dec
TI  - Duke Case-Mix System (DUMIX) for ambulatory health care.
PG  - 1385-94
AB  - The Duke Case-Mix System (DUMIX), which combines age, gender, patient-reported 
      perceived and physical health status, and provider-reported or auditor-reported 
      severity of illness to classify patients by their risk of high future 
      utilization, explained 17.1% of the variance in future clinic charges and 16.6% 
      of the variance in return visits. When a random half of 413 ambulatory adults 
      were classified into four risk classes by predictive regression coefficients from 
      the other half, there was a stepwise increase in actual future utilization by 
      risk class. The most accurate classification was for Class 4 (highest risk) 
      patients, with a sensitivity of 40.8%, specificity of 82.1%, and likelihood ratio 
      of 2.3. These 23.7% of patients accounted for 44.2% of charges for all patients. 
      When predictive coefficients from this population were used to classify a 
      different group of 206 ambulatory adults, past utilization also increased in 
      stepwise order by case-mix class.
FAU - Parkerson, G R Jr
AU  - Parkerson GR Jr
AD  - Department of Community and Family Medicine, Duke University Medical Center, 
      Durham, NC 27710, USA.
FAU - Michener, J L
AU  - Michener JL
FAU - Yarnall, K S
AU  - Yarnall KS
FAU - Hammond, W E
AU  - Hammond WE
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Clin Epidemiol
JT  - Journal of clinical epidemiology
JID - 8801383
SB  - IM
MH  - Adolescent
MH  - Adult
MH  - Aged
MH  - Ambulatory Care/*classification/standards
MH  - Cost Control
MH  - Diagnosis-Related Groups/*classification/standards
MH  - Female
MH  - Follow-Up Studies
MH  - *Health Status Indicators
MH  - Humans
MH  - Male
MH  - Managed Care Programs
MH  - Middle Aged
MH  - Predictive Value of Tests
MH  - Random Allocation
MH  - Reproducibility of Results
MH  - Retrospective Studies
MH  - Severity of Illness Index
MH  - Surveys and Questionnaires
EDAT- 1998/02/05 07:41
MHDA- 2001/03/28 10:01
CRDT- 1998/02/05 07:41
PHST- 1998/02/05 07:41 [pubmed]
PHST- 2001/03/28 10:01 [medline]
PHST- 1998/02/05 07:41 [entrez]
AID - S0895435697002175 [pii]
AID - 10.1016/s0895-4356(97)00217-5 [doi]
PST - ppublish
SO  - J Clin Epidemiol. 1997 Dec;50(12):1385-94. doi: 10.1016/s0895-4356(97)00217-5.