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. 1991 Summer;12(4):17–26.
where,
Uo = observed (i.e., actual) utilization,
Ue = expected utilization,
Is = county-subsidized outpatient units of service (visits, inpatient days, or discharges) under Welfare and Institutions section 17000 responsibilities (general indigent care program) in study year (if separate from IMS program),
Ib = county-subsidized outpatient units of service (visits, inpatient days, or discharges) under Welfare and Institutions section 17000 responsibilities in baseline year,
IMSS = county-subsidized outpatient units of service (visits, inpatient days, or discharges) under County Indigent Medical Services program for former MIA population, and
MIAb = Medi-Cal MIA outpatient units of service (visits, inpatient days, or discharges) for County in baseline year, adjusted.