Lawrence Oresanya1, Shoujun Zhao1, Siqi Gan2, Brant E Fries3, Philip P Goodney4, Kenneth E Covinsky5, Michael S Conte1, Emily Finlayson6. 1. Department of Surgery, University of California, San Francisco. 2. The Fielding School of Public Health, University of California, Los Angeles. 3. Institute of Gerontology and University of Michigan and VA Ann Arbor Healthcare Systems, Ann Arbor. 4. Department of Surgery, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire5The Dartmouth Institute for Health Policy and Clinical Practice, Lebanon, New Hampshire6The VA Outcomes Group, White River Junction, Vermont. 5. Division of Geriatrics, University of California, San Francisco8San Francisco Veterans Affairs Medical Center, San Francisco, California. 6. Department of Surgery, University of California, San Francisco7Division of Geriatrics, University of California, San Francisco9The Phillip R. Lee Institute for Health Policy Studies, University of California, San Francisco.
Abstract
IMPORTANCE: Lower extremity revascularization often seeks to allow patients with peripheral arterial disease to maintain the ability to walk, a key aspect of functional independence. Surgical outcomes in patients with high levels of functional dependence are poorly understood. OBJECTIVE: To determine functional status trajectories, changes in ambulatory status, and survival after lower extremity revascularization in nursing home residents. DESIGN: Using full Medicare claims data for 2005 to 2009, we identified nursing home residents who underwent lower extremity revascularization. With the Minimum Data Set for Nursing Homes activities of daily living summary score, we examined changes in their ambulatory and functional status after surgery. We identified patient and surgery characteristics associated with a composite measure of clinical and functional failure-death or nonambulatory status 1 year after surgery. SETTING: All nursing homes in the United States participating in Medicare or Medicaid. PARTICIPANTS: Nursing home residents who underwent lower extremity revascularization. MAIN OUTCOMES AND MEASURES: Functional status, ambulatory status, and death. RESULTS: During the study period, 10,784 long-term nursing home residents underwent lower extremity revascularization. Prior to surgery, 75% of the residents were not walking; 40% had experienced functional decline. One year after surgery, 51% of patients had died, 28% were nonambulatory, and 32% had sustained functional decline. Among 1672 residents who were ambulatory before surgery, 63% had died or were nonambulatory at 1 year; among 7188 who were nonambulatory, 89% had died or were nonambulatory. After multivariate adjustment, factors independently associated with death or nonambulatory status were 80 years or older (adjusted hazard ratio [AHR], 1.28; 95% CI, 1.16-1.40), cognitive impairment (AHR, 1.23; 95% CI, 1.18-1.29), congestive heart failure (AHR, 1.16; 95% CI, 1.11-1.22), renal failure (AHR, 1.09; 95% CI, 1.04-1.14), emergent surgery (AHR, 1.29; 95% CI, 1.23-1.35), nonambulatory status before surgery (AHR, 1.88; 95% CI, 1.78-1.99), and decline in activities of daily living before surgery (AHR, 1.23; 95% CI, 1.18-1.28). CONCLUSIONS AND RELEVANCE: Of nursing home residents in the United States who undergo lower extremity revascularization, few are alive and ambulatory 1 year after surgery. Most who were still alive had gained little, if any, function.
IMPORTANCE: Lower extremity revascularization often seeks to allow patients with peripheral arterial disease to maintain the ability to walk, a key aspect of functional independence. Surgical outcomes in patients with high levels of functional dependence are poorly understood. OBJECTIVE: To determine functional status trajectories, changes in ambulatory status, and survival after lower extremity revascularization in nursing home residents. DESIGN: Using full Medicare claims data for 2005 to 2009, we identified nursing home residents who underwent lower extremity revascularization. With the Minimum Data Set for Nursing Homes activities of daily living summary score, we examined changes in their ambulatory and functional status after surgery. We identified patient and surgery characteristics associated with a composite measure of clinical and functional failure-death or nonambulatory status 1 year after surgery. SETTING: All nursing homes in the United States participating in Medicare or Medicaid. PARTICIPANTS: Nursing home residents who underwent lower extremity revascularization. MAIN OUTCOMES AND MEASURES: Functional status, ambulatory status, and death. RESULTS: During the study period, 10,784 long-term nursing home residents underwent lower extremity revascularization. Prior to surgery, 75% of the residents were not walking; 40% had experienced functional decline. One year after surgery, 51% of patients had died, 28% were nonambulatory, and 32% had sustained functional decline. Among 1672 residents who were ambulatory before surgery, 63% had died or were nonambulatory at 1 year; among 7188 who were nonambulatory, 89% had died or were nonambulatory. After multivariate adjustment, factors independently associated with death or nonambulatory status were 80 years or older (adjusted hazard ratio [AHR], 1.28; 95% CI, 1.16-1.40), cognitive impairment (AHR, 1.23; 95% CI, 1.18-1.29), congestive heart failure (AHR, 1.16; 95% CI, 1.11-1.22), renal failure (AHR, 1.09; 95% CI, 1.04-1.14), emergent surgery (AHR, 1.29; 95% CI, 1.23-1.35), nonambulatory status before surgery (AHR, 1.88; 95% CI, 1.78-1.99), and decline in activities of daily living before surgery (AHR, 1.23; 95% CI, 1.18-1.28). CONCLUSIONS AND RELEVANCE: Of nursing home residents in the United States who undergo lower extremity revascularization, few are alive and ambulatory 1 year after surgery. Most who were still alive had gained little, if any, function.
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