No Weekend Effect in Elective Primary Total Knee Arthroplasty: A Nationwide Analysis of 437,121 U.S. Cases

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Publicado en:Journal of Clinical Medicine vol. 14, no. 24 (2025), p. 8816-8825
Autor principal: Maman, David
Otros Autores: Steinfeld Yaniv, Berkovich Yaron
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MDPI AG
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Acceso en línea:Citation/Abstract
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022 |a 2077-0383 
024 7 |a 10.3390/jcm14248816  |2 doi 
035 |a 3286308884 
045 2 |b d20250101  |b d20251231 
100 1 |a Maman, David  |u Carmel Medical Center, Haifa 3436212, Israel 
245 1 |a No Weekend Effect in Elective Primary Total Knee Arthroplasty: A Nationwide Analysis of 437,121 U.S. Cases 
260 |b MDPI AG  |c 2025 
513 |a Journal Article 
520 3 |a Background: The “weekend effect” describes the concern that patients treated on weekends experience worse outcomes due to differences in staffing, resource availability, and workflow. Evidence for a weekend effect in elective orthopedic surgery is limited and inconsistent, and most prior work does not ensure that surgery itself actually occurs on the weekend. We aimed to evaluate whether weekend admission and surgery are associated with worse in-hospital or 90-day outcomes in a contemporary nationwide cohort of elective primary total knee arthroplasty performed on hospital day 0. Methods: We conducted a retrospective cohort study using the U.S. Nationwide Readmissions Database (NRD) from 2020 to 2022. Adult patients (≥18 years) undergoing elective primary TKA with surgery on hospital day 0 were identified using ICD-10-PCS procedure codes in the primary procedure position. Weekend admissions (Saturday–Sunday) were compared with weekday admissions (Monday–Friday). Baseline demographics, comorbidities, and hospital characteristics were assessed. Outcomes included length of stay, total hospital charges, in-hospital mortality, major postoperative complications, and 90-day all-cause readmissions, time to readmission, readmission length of stay, and procedures during readmission. Continuous variables were compared using t-tests and categorical variables using chi-square or Fisher’s exact tests (two-sided α = 0.05). Results: Among 437,121 elective day-0 TKA admissions, 435,822 (99.7%) occurred on weekdays and 1299 (0.3%) on weekends. Baseline characteristics were highly similar between groups. No clinically meaningful differences were observed in in-hospital complications, mortality, or 90-day readmission outcomes. Small statistical differences in blood transfusion, blood-loss anemia, and postoperative pain did not follow a pattern consistent with a weekend effect. Conclusions: In this large contemporary national cohort of elective primary TKA with surgery on hospital day 0, weekend admission and surgery were not associated with worse in-hospital outcomes or higher 90-day readmission rates. Within standardized perioperative pathways, elective TKA appears safe when performed on weekends, without evidence of a weekend effect. 
651 4 |a United States--US 
653 |a Workforce planning 
653 |a Urogenital system 
653 |a Urinary tract diseases 
653 |a Anemia 
653 |a Thrombosis 
653 |a Pneumonia 
653 |a Recovery (Medical) 
653 |a Length of stay 
653 |a Trauma 
653 |a Sepsis 
653 |a Mortality 
653 |a Urinary tract infections 
653 |a Pulmonary embolisms 
653 |a Joint replacement surgery 
653 |a Hospitals 
653 |a Surgical site infections 
653 |a Fractures 
653 |a Variables 
653 |a Codes 
653 |a Orthopedics 
653 |a Kidneys 
653 |a Respiratory failure 
653 |a COVID-19 
653 |a Patient-centered care 
653 |a Evidence-based medicine 
653 |a Surgical techniques 
653 |a Physical examinations 
653 |a Health disparities 
653 |a Clinical trials 
700 1 |a Steinfeld Yaniv  |u Carmel Medical Center, Haifa 3436212, Israel 
700 1 |a Berkovich Yaron  |u Carmel Medical Center, Haifa 3436212, Israel 
773 0 |t Journal of Clinical Medicine  |g vol. 14, no. 24 (2025), p. 8816-8825 
786 0 |d ProQuest  |t Health & Medical Collection 
856 4 1 |3 Citation/Abstract  |u https://www.proquest.com/docview/3286308884/abstract/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch 
856 4 0 |3 Full Text  |u https://www.proquest.com/docview/3286308884/fulltext/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch 
856 4 0 |3 Full Text - PDF  |u https://www.proquest.com/docview/3286308884/fulltextPDF/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch