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. Author manuscript; available in PMC: 2024 Jul 9.
Published in final edited form as: Ann Intern Med. 2024 Jan 9;177(1):109–110. doi: 10.7326/M23-2264

Table 1.

Patient characteristics who received acute hospital care at home

Characteristic, n (%) AHCaH (n=5,132)
Sex
 Male 2,364 (46.1)
 Female 2,768 (53.9)
Age
 18–64 391 (7.6)
 65–74 1,577 (30.7)
 75–84 1,959 (38.3)
 85+ 1,205 (23.5)
Race and ethnicity
 White 4,371 (85.2)
 Black 346 (6.7)
 Latin@ 219 (4.3)
 Asian 77 (1.5)
 Other/Unknown 119 (2.3)
Mean household income, $ (SD) 83,932 (28,241)
Geography by RUCA
 Metropolitan 4,807 (93.8)
 Micropolitan 235 (4.6)
 Small Town/Rural/Not Coded 89 (1.7)
Reason for Medicare
 Old Age 4,136 (80.6)
 Disability 930 (18.1)
 ESRD 45 (0.9)
 Disability & ESRD 21 (0.4)
Dual-Eligible 705 (13.8)
Census Region
 Northeast 1,610 (31.4)
 Midwest 747 (14.6)
 South 2,439 (47.5)
 West 335 (6.5)
HCC Score, mean (SD) 3.15 (2.06)
Case Mix Index, mean (SD) 1.31 (0.49)
Comorbidities
 Heart failure 2,175 (42.5)
 COPD 2,219 (43.3)
 Asthma 1,306 (25.5)
 Diabetes 2,375 (46.4)
 Cancer 1,132 (22.1)
 Stroke/TIA 977 (19.1)
 Dementia 822 (16.1)
COVID Diagnosis (Primary) 564 (11.0)

HCC Score: Score used by the Centers for Medicare and Medicaid Services as part of a risk-adjustment model that identifies individuals with serious conditions and allows Medicare to project the future annual cost of care. A HCC score of 1.0 indicates average complexity and spending. A higher HCC score represents a patient with more complexity.

Case Mix Index (CMI): Calculated by summing the Medicare Severity-Diagnosis Related Group weight for each discharge and dividing the total by the number of discharges. CMI reflects the diversity, complexity, and resource needs of hospitalized patients. A higher CMI represents more complexity and resource needs.

Abbreviations: AHCaH, acute hospital care at home; COPD, chronic obstruction pulmonary disease; COVID, coronavirus disease; ESRD, end-stage renal disease; HCC, hierarchical condition category; RUCA, rural-urban community area; SD, standard deviation; TIA, transient ischemic attack