5 results on '"Bates KR"'
Search Results
2. Comparison of a Risk Calculator With Frailty Indices in Patients Undergoing Lung Cancer Resection.
- Author
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Vitello DJ, Logan CD, Zaza NN, Bates KR, Jacobs R, Feinglass J, Merkow RP, and Bentrem DJ
- Subjects
- Humans, Female, Male, Aged, Middle Aged, Risk Assessment methods, Patient Readmission statistics & numerical data, Pneumonectomy mortality, Retrospective Studies, Reoperation statistics & numerical data, Lung Neoplasms surgery, Lung Neoplasms mortality, Lung Neoplasms pathology, Frailty complications, Postoperative Complications epidemiology, Postoperative Complications etiology, Carcinoma, Non-Small-Cell Lung surgery, Carcinoma, Non-Small-Cell Lung mortality, Carcinoma, Non-Small-Cell Lung pathology
- Abstract
Introduction: While frailty has gained attention for its utility in risk stratification, no studies have directly compared them to existing risk calculators. The objective of this study was to compare the risk stratification of the American College of Surgeons Surgical Risk Calculator (ACS-SRC), the Revised Risk Analysis Index (RAI-rev), and the Modified Frailty Index (5-mFI). The primary outcomes were 30-day postoperative morbidity, 30-day postoperative mortality, unplanned readmission, unplanned reoperation, and discharge disposition other than home., Methods: Patients undergoing anatomic lung resection for primary, nonsmall cell lung cancer were identified within the ACS National Quality Improvement Program (ACS NSQIP) database. Tools were compared for discrimination in the primary outcomes., Results: 9663 patients undergoing anatomic lung resection for cancer between 2012 and 2014 were included. The cohort was 53.1% female. Median age at diagnosis was 67 (IQR 59-74) years. Perioperative morbidity and mortality rates were 10.9% (n = 1048) and 1.6% (n = 158). Rates of 30-day postoperative unplanned readmission and reoperation were 7.5% (n = 725) and 4.8% (n = 468). The ACS-SRC had the highest discrimination for all measured outcomes, as measured by the area under the receiver operating curve (AUC) and corresponding confidence interval (95% CI). This included perioperative mortality (AUC 0.74, 95% CI 0.71-0.78), compared to RAI-rev (AUC 0.66, 95% CI 0.62-0.69) and 5-mFI (AUC 0.61, 95% CI 0.57-0.65; p < 0.001). The RAI-rev and 5-mFI had similar discrimination for all measured outcomes., Conclusion: ACS-SRC was the perioperative risk stratification tool with the highest predictive discrimination for adverse, 30-day, postoperative events for patients with cancer treated with anatomic lung resection., (© 2024 The Author(s). Journal of Surgical Oncology published by Wiley Periodicals LLC.)
- Published
- 2024
- Full Text
- View/download PDF
3. Current National Treatment Trends for Gastric Adenocarcinoma in the United States.
- Author
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Vitello DJ, Zaza NN, Bates KR, Janczewski LM, Rodriguez G, and Bentrem DJ
- Subjects
- Humans, Female, Male, United States epidemiology, Middle Aged, Aged, Chemotherapy, Adjuvant statistics & numerical data, Gastrectomy, Chemoradiotherapy, Adjuvant statistics & numerical data, Survival Rate, Follow-Up Studies, Prognosis, Retrospective Studies, Stomach Neoplasms therapy, Stomach Neoplasms pathology, Stomach Neoplasms mortality, Adenocarcinoma therapy, Adenocarcinoma pathology, Adenocarcinoma mortality, Neoadjuvant Therapy
- Abstract
Purpose: The treatment of gastric adenocarcinoma (GA) continues to evolve. While neoadjuvant chemotherapy (NAC) has demonstrated emerging benefit, the optimal treatment regimen, and sequence remain to be firmly established., Methods: Patients with nonmetastatic GA who underwent resection were identified within the 2020 National Cancer Database. Patients were compared between the mutually exclusive treatment groups of NAC, neoadjuvant chemoradiotherapy (NCRT), adjuvant chemotherapy, adjuvant chemoradiotherapy (CRT), and surgery only. The primary endpoint was receipt of NAC or NCRT. Patients were 1-to-1 propensity score matched for receiving any neoadjuvant therapy. Multivariable logistic regression was used to identify predictors of receipt of any neoadjuvant therapy and receipt of any adjuvant therapy., Results: Twenty-five thousand and seventy-three patients were included in the analysis. Patients were treated with NAC (25.0%), NCRT (31.4%), adjuvant chemotherapy (6.5%), adjuvant CRT (12.6%), and surgery only (24.5%). Compared to 2006-2011, patients diagnosed between 2012 and 2017 experienced the greatest increases in NAC (18.6% vs. 29.0%; p < 0.001) and NCRT (25.0% vs. 35.5%; p < 0.001). Median OS was 44.9 months. OS was longest for patients who received any neoadjuvant therapy compared to those receiving adjuvant or surgery only (51.0 vs. 42.4 vs. 38.0 months, respectively; p < 0.001). Patients who were Black, in the lowest income quartile or treated at lower volume facilities were less likely to receive NAT (all p < 0.001)., Conclusions: There has been significant acceleration in the use of neoadjuvant therapy for GA. Currently, NCRT followed by surgery are the most common treatment sequences in the United States. Additional trials are needed to further define the optimal treatment sequence., (© 2024 The Author(s). Journal of Surgical Oncology published by Wiley Periodicals LLC.)
- Published
- 2024
- Full Text
- View/download PDF
4. Well-balanced compressible cut-cell simulation of atmospheric flow.
- Author
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Klein R, Bates KR, and Nikiforakis N
- Abstract
Cut-cell meshes present an attractive alternative to terrain-following coordinates for the representation of topography within atmospheric flow simulations, particularly in regions of steep topographic gradients. In this paper, we present an explicit two-dimensional method for the numerical solution on such meshes of atmospheric flow equations including gravitational sources. This method is fully conservative and allows for time steps determined by the regular grid spacing, avoiding potential stability issues due to arbitrarily small boundary cells. We believe that the scheme is unique in that it is developed within a dimensionally split framework, in which each coordinate direction in the flow is solved independently at each time step. Other notable features of the scheme are: (i) its conceptual and practical simplicity, (ii) its flexibility with regard to the one-dimensional flux approximation scheme employed, and (iii) the well-balancing of the gravitational sources allowing for stable simulation of near-hydrostatic flows. The presented method is applied to a selection of test problems including buoyant bubble rise interacting with geometry and lee-wave generation due to topography.
- Published
- 2009
- Full Text
- View/download PDF
5. Influences on the global structure of cortical maps.
- Author
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Goodhill GJ, Bates KR, and Montague PR
- Subjects
- Animals, Dominance, Cerebral, Macaca, Brain Mapping, Models, Neurological, Retina physiology, Visual Cortex physiology, Visual Pathways physiology
- Abstract
Cortical maps often contain global spatial structure: however, theoretical accounts for their development have generally concentrated on reproducing only local structure. We show that the elastic net model of cortical map formation can closely approximate the global structure of the ocular dominance column map observed in macaque primary visual cortex. A key component is the assumption of spatially non-uniform and anisotropic correlations in the retina. This work shows how genetic and epigenetic effects could combine to establish characteristic global structure in cortical maps.
- Published
- 1997
- Full Text
- View/download PDF
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