Multimorbidity, Mental Illness, and Quality of Care: Preventable Hospitalizations among Medicare Beneficiaries

Table 2

Number and weighted percent with ambulatory care sensitive hospitalizations by multimorbidity among Medicare beneficiaries Medicare current beneficiary survey, 2000–2005.

	MM/MI		MM/No MI		No MM		Sig
	𝑁	Wt%	𝑁	Wt%	𝑁	Wt%
	Multimorbidity classification
Any ACSH							***
Yes	139	10.8	578	8.8	72	4.0
No	1,150	89.2	5,384	91.2	1,640	96.0
Acute ACSH							**
Yes	62	4.4	254	3.7	44	2.4
No	1,227	95.6	5,708	96.3	1,668	97.6
Chronic ACSH							***
Yes	93	7.5	399	6.2	34	1.9
No	1,196	92.5	5,563	93.8	1,678	98.1
	Among inpatient users only
Any ACSH							*
Yes	139	27.6	578	25.7	72	19.1
No	381	72.4	1,586	74.3	305	80.9
Acute ACSH
Yes	62	11.3	254	10.9	44	11.5
No	458	88.7	1,910	89.1	333	88.5
Chronic ACSH							***
Yes	93	19.3	399	18.2	34	9.1
No	427	80.7	1,765	81.8	343	90.9

Note: Based on 8,963 Medicare beneficiaries who were followed for 3 years and were first interviewed either in 2000, 2001, 2002, or 2003 and not enrolled in Medicare Health Maintenance organizations during the observation years.
Asterisks represent significant group differences between multimorbidity categories and preventable hospitalizations based on chi-square tests.
ACSH: ambulatory care sensitive hospitalizations; Wt: weighted
*** 𝑃<0.001; **0.001<𝑃<0.01; *0.01<𝑃<0.05.