Expenditure variations analysis using residuals for identifying high health care utilizers in a state Medicaid program

Table 7 Potentially Preventable Readmissions (PPR) statistics of index year and next year for high utilizers versus other patients

	Index year	High Utilizers (High Residuals)	Other Patients
Average number of PPRs in index year	2011	1.24	0.15
	2012	1.12	0.20
	2013	1.10	0.21
	2014	0.86	0.19
Average PPR expenditures in index year, $	2011	7793.23	1200.63
	2012	6807.52	1259.59
	2013	6229.76	1237.03
	2014	5241.54	1112.03
Average number of PPRs in next year	2011	0.70	0.17
	2012	0.50	0.18
	2013	0.37	0.14
Average PPR expenditures in next year, $	2011	3698.67	1113.45
	2012	2549.41	1001.92
	2013	2072.29	758.82

Residuals and high utilizers are identified from index year. Per-member per-month inpatient hospital expenditures is the dependent variable of the model

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