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Masutani R, Pawar A, Lee H, Weissman JS, Kim DH. Outcomes of Common Major Surgical Procedures in Older Adults With and Without Dementia. JAMA Netw Open. 2020;3(7):e2010395. doi:10.1001/jamanetworkopen.2020.10395
Dementia is associated with poor outcomes after surgical procedures.1-4 However, the types of major surgical procedures commonly performed in older adults with dementia and the surgical outcomes have not been characterized in a national sample. This cross-sectional study was conducted to identify commonly performed major surgical procedures in patients with dementia and compare in-hospital mortality, home discharge, and length of stay (LOS) among patients with and without dementia.
We analyzed data from the Premier Healthcare Database, an all-payer, hospital-based, administrative and billing database that contains approximately 25% of inpatient admissions in the United States. We identified adults 65 years or older who underwent major surgical procedures, as defined by the Agency for Healthcare Research and Quality, between January 1, 2016, and March 31, 2018. Dementia was defined using the Chronic Conditions Data Warehouse algorithm.5 We estimated the odds ratios (ORs) and 95% CIs for in-hospital mortality and home discharge and the mean difference in LOS between patients with and without dementia using generalized estimating equations for logistic and linear regressions, respectively, to adjust for age, sex, race, admission source, Charlson Comorbidity Index, and procedure type and to account for clustering within hospitals. The outcome analysis was performed for the top 10 procedures combined and separately. Analyses were performed using SAS, version 9.4 (SAS Institute Inc). This study qualified for exemption from the Brigham and Women’s Hospital Institutional Review Board; the Premier Healthcare Database provided the researchers with a deidentified data set that did not have patient or hospital identifiers. The Partners Human Research Committee waived patient informed consent because this study was minimal risk, the waiver of informed consent did not increase the risk to human participants, and the research could not be practically conducted without a waiver of informed consent. This study followed the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) reporting guideline for cross-sectional studies.
The study population included 164 551 patients with dementia and 2 320 668 patients without dementia who underwent major surgical procedures at 804 hospitals. Patients with dementia were older (mean [SD] age, 81  vs 74  years), more likely to be women (57.4% vs 50.9%), more likely to be African American individuals (9.7% vs 7.0%), and more likely to have undergone an emergent operation (60.8% vs 25.8%) than those without dementia. Similar proportions of patients were treated at teaching hospitals (48.0% vs 47.3%) and urban hospitals (89.2% vs 89.8%). Of total surgical procedures, 6.4% were performed in patients with dementia (Table 1). The most commonly performed procedure was hip or femur repair (16.5%) in patients with dementia and knee arthroplasty (8.6%) in patients without dementia.
After adjustment, patients with dementia experienced a higher incidence of in-hospital mortality (OR, 1.15; 95% CI, 1.10-1.20), a lower incidence of home discharge (OR, 0.30; 95% CI, 0.29-0.31), and increased LOS (mean difference, 2.35 days; 95% CI, 2.13-2.57 days) compared with patients without dementia undergoing the same procedures (Table 2). The highest odds of mortality were associated with genitourinary tract procedures (OR, 1.59; 95% CI, 1.31-1.91). The lowest odds of home discharge were associated with total or partial hip replacement (OR, 0.19; 95% CI, 0.18-0.21). Except for operations classified as other therapeutic procedures, the difference in LOS was the largest for breast and skin operations (mean difference, 2.59 days; 95% CI, 2.12-3.05 days).
This study suggests that, in older patients with dementia, the risk of mortality, nonhome discharge, and prolonged hospitalization should be carefully weighed against the potential benefit of surgical procedures. Once the decision is made to proceed with surgical procedures, comanagement that includes both the geriatrics and the surgery departments can be beneficial.6 Our results can be useful to prioritize surgical procedures in which development of a comanagement program is necessary. Limitations of our study include reliance on diagnosis codes to identify dementia, which may capture only severe cases; lack of information on preadmission living situation, disease severity, and prognostic factors (eg, frailty) in administrative claims data; and unavailability of long-term outcomes beyond hospital discharge. It remains to be determined whether less severe dementia detected by a screening test is associated with poor postoperative outcomes. Nonetheless, our findings from a contemporary national sample provide useful information toward improving surgical care of older adults with dementia.
Accepted for Publication: May 2, 2020.
Published: July 14, 2020. doi:10.1001/jamanetworkopen.2020.10395
Open Access: This is an open access article distributed under the terms of the CC-BY License. © 2020 Masutani R et al. JAMA Network Open.
Corresponding Author: Dae Hyun Kim, MD, MPH, ScD, Division of Pharmacoepidemiology, Department of Medicine, Brigham and Women’s Hospital, 1620 Tremont St, Ste 3030, Boston, MA 02120 (firstname.lastname@example.org).
Author Contributions: Dr Kim had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Concept and design: Pawar, Weissman, Kim.
Acquisition, analysis, or interpretation of data: Masutani, Pawar, Lee, Kim.
Drafting of the manuscript: Masutani, Kim.
Critical revision of the manuscript for important intellectual content: Pawar, Lee, Weissman, Kim.
Statistical analysis: Pawar, Lee.
Obtained funding: Kim.
Administrative, technical, or material support: Weissman, Kim.
Supervision: Weissman, Kim.
Conflict of Interest Disclosures: Dr Kim reported receiving grants from the National Institute on Aging during the conduct of the study. No other disclosures were reported.
Funding/Support: This study was funded by grant R01AG056368 from the National Institute on Aging (Dr Kim).
Role of the Funder/Sponsor: The National Institute on Aging had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
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