• Geoffrey J Hoffman, Lillian C Min, Haiyin Liu, Dan J Marciniak, and Lona Mody.
• Department of Systems, Populations and Leadership, University of Michigan School of Nursing, Ann Arbor, Michigan.
• J Am Geriatr Soc. 2020 Feb 1; 68 (2): 370-378.

ObjectivesAlthough preventable, healthcare-associated infections (HAIs) are commonly observed in post-acute care settings for at-risk older adults and are a leading cause of hospital readmissions. However, whether HAIs resulting in avoidable readmissions for preexisting HAIs (the same HAI as at the index admission) are more common for patients discharged to post-acute care as opposed to home is unknown. We examined the risk of preexisting HAI readmissions according to patient discharge disposition and comorbidity level.DesignWe used 2013-2014 national hospital discharge data to estimate the likelihood of readmissions for preexisting HAIs according to patients' discharge disposition and whether the likelihood varies according to patient comorbidity level, across four common types of HAIs (not including respiratory infections).ParticipantsA total of 702 304 hospital discharges for Medicare beneficiaries 65 years or older.MeasurementsOur outcome was a 30-day preexisting, or "linked," HAI readmission (readmission involving the same HAI diagnosis as at the index admission). Patient discharge disposition was skilled nursing facility (SNF), home health care, and home care without home health care ("home").ResultsOf 702 304 index admissions involving HAI treatment, 353 073 (50%) were discharged to a SNF, 179 490 (26%) to home health care, and 169 872 (24%) to home. Overall, 17 523 (2.5%) of preexisting HAIs resulted in linked HAI readmissions, which were more common for Clostridioides difficile infections (4.0%) and urinary tract infections (2.4%) than surgical site infections (1.1%; P < .001). Being discharged to a SNF compared to home or to home health care was associated with a 1.15 percentage point (95% confidence interval = -1.29 to -1.00), or 38%, lower risk of a linked HAI readmission. This risk difference was observed to increase with greater patient comorbidity.ConclusionsSNF discharges were associated with fewer avoidable readmissions for preexisting HAIs compared with home discharges. Further research to identify modifiable mechanisms that improve posthospital infection care at home is needed. J Am Geriatr Soc 68:370-378, 2020.© 2019 The American Geriatrics Society.

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