Table 3.

Hospital readmissions within 30 days (all-cause) by selected phenotype (see Table 1) or phenotype combination in the UHC CDB (2006–2011, all hospitals): readmission rate, and median readmission rate and interquartile range for UHC hospitals.

Population	Number of encounters	Number of readmissions	Readmission rate (%)	Median readmission rate by hospital (%)	Interquartile range by hospital (%)
All patients	15,699,788	1,969,858	13	12	[10 – 13]
Chronic kidney diseasea	1,706,325	385,090	23	21	[19 – 23]
Heart failurea	1,731,307	343,806	20	19	[17 – 21]
Diabetesa	3,149,083	542,760	17	16	[15 – 18]
Cancera	2,988,904	536,855	18	17	[16 – 19]
Acute Myocardial Infarctiona	410,335	57,310	14	14	[12 – 16]
Sickle-cell anemiaa	110,289	34,249	31	25	[17 – 32]
Multiple myocardial infarction (MI) patientb	195,263	69,471	36	36	[33 – 40]
Metastasisa	652,198	133,583	20	20	[17 – 23]
End-stage renal diseasea	663,230	178,222	27	24	[22 – 28]
Uncontrolled diabetes mellitusa	570,973	108,250	19	18	[16 – 20]
Pressure ulcera	293,757	62,848	21	20	[17 – 23]
Uncontrolled diabetes mellitus and pressure ulcera	30,667	7,170	23	22	[18 – 26]
Uncontrolled diabetes mellitus and End-stage renal diseasea	67,617	19,381	29	27	[23 – 31]
Sickle cell crisisa	81,049	27,849	34	27	[19 – 36]
Methicillin-resistant Staph aureus (MRSA) infectiona	107,119	18,525	17	17	[13 – 19]
Stroke and MRSAa	2,054	346	17	12	[0 – 21]
Frequent-flier encountera	455,550	202,470	44	43	[39 – 45]
Chemotherapy 180 days before surgerya,c	51,186	15,789	31	31	[26 – 35]
Chemotherapy 365 days before surgerya,c	60,507	18,305	30	30	[26 – 34]
Encounter in last 180 daysa	3,932,748	922,926	23	23	[20 – 24]
Encounter in last 90 daysa	3,150,364	792,867	25	24	[21 – 26]
CKD and frequent-flier encounter a	139,255	67,532	48	44	[39 – 47]
Frequent-flier encounter in Multiple MI patienta	25,193	12,092	48	44	[38 – 50]
MI and MRSAa	31,185	7,237	23	22	[18 – 26]

^aRow represents encounters from which the specified phenotype was computed.

^bRow represents all encounters in patients who express the specified phenotype.

^cRates of readmission subsequent to the surgical encounter are reported.