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Januszewski AS, Niedzwiecki P, Sachithanandan N, Ward GM, O'Neal DN, Zozulinska-Ziolkiewicz DA, Uruska AA, Jenkins AJ. Interactive calculator to estimate insulin sensitivity in type 1 diabetes. J Diabetes Investig 2024. [PMID: 38366869 DOI: 10.1111/jdi.14161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/18/2024] [Accepted: 01/23/2024] [Indexed: 02/18/2024] Open
Abstract
The gold standard for measuring insulin sensitivity (IS) is the hyperinsulinemic-euglycemic clamp, a time, costly, and labor-intensive research tool. A low insulin sensitivity is associated with a complication-risk in type 1 diabetes. Various formulae using clinical data have been developed and correlated with measured IS in type 1 diabetes. We consolidated multiple formulae into an online calculator (bit.ly/estimated-GDR), enabling comparison of IS and its probability of IS <4.45 mg/kg/min (low) or >6.50 mg/kg/min (high), as measured in a validation set of clamps in 104 adults with type 1 diabetes. Insulin sensitivity calculations using different formulae varied significantly, with correlations (R2 ) ranging 0.005-0.87 with agreement in detecting low and high glucose disposal rates in the range 49-93% and 89-100%, respectively. We demonstrate that although the calculated IS varies between formulae, their interpretation remains consistent. Our free online calculator offers a user-friendly tool for individual IS calculations and also offers efficient batch processing of data for research.
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Affiliation(s)
- Andrzej S Januszewski
- NHMRC Clinical Trials Centre, University of Sydney, Sydney, New South Wales, Australia
- Department of Medicine, University of Melbourne, Fitzroy, Victoria, Australia
- Sydney Pharmacy School, University of Sydney, Sydney, New South Wales, Australia
| | - Pawel Niedzwiecki
- Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznan, Poland
| | | | - Glenn M Ward
- Department of Medicine, University of Melbourne, Fitzroy, Victoria, Australia
| | - David N O'Neal
- Department of Medicine, University of Melbourne, Fitzroy, Victoria, Australia
| | | | - Aleksandra A Uruska
- Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznan, Poland
| | - Alicia J Jenkins
- NHMRC Clinical Trials Centre, University of Sydney, Sydney, New South Wales, Australia
- Department of Medicine, University of Melbourne, Fitzroy, Victoria, Australia
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
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Karabacak M, Schupper AJ, Carr MT, Bhimani AD, Steinberger J, Margetis K. Development and internal validation of machine learning models for personalized survival predictions in spinal cord glioma patients. Spine J 2024:S1529-9430(24)00072-X. [PMID: 38365005 DOI: 10.1016/j.spinee.2024.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 01/16/2024] [Accepted: 02/05/2024] [Indexed: 02/18/2024]
Abstract
BACKGROUND CONTEXT Numerous factors have been associated with the survival outcomes in patients with spinal cord gliomas (SCG). Recognizing these specific determinants is crucial, yet it is also vital to establish a reliable and precise prognostic model for estimating individual survival outcomes. OBJECTIVE The objectives of this study are twofold: first, to create an array of interpretable machine learning (ML) models developed for predicting survival outcomes among SCG patients; and second, to integrate these models into an easily navigable online calculator to showcase their prospective clinical applicability. STUDY DESIGN This was a retrospective, population-based cohort study aiming to predict the outcomes of interest, which were binary categorical variables, in SCG patients with ML models. PATIENT SAMPLE The National Cancer Database (NCDB) was utilized to identify adults aged 18 years or older who were diagnosed with histologically confirmed SCGs between 2010 and 2019. OUTCOME MEASURES The outcomes of interest were survival outcomes at three specific time points post-diagnosis: 1, 3, and 5 years. These outcomes were formed by combining the "Vital Status" and "Last Contact or Death (Months from Diagnosis)" variables. Model performance was evaluated visually and numerically. The visual evaluation utilized receiver operating characteristic (ROC) curves, precision-recall curves (PRCs), and calibration curves. The numerical evaluation involved metrics such as sensitivity, specificity, accuracy, area under the PRC (AUPRC), area under the ROC curve (AUROC), and Brier Score. METHODS We employed five ML algorithms-TabPFN, CatBoost, XGBoost, LightGBM, and Random Forest-along with the Optuna library for hyperparameter optimization. The models that yielded the highest AUROC values were chosen for integration into the online calculator. To enhance the explicability of our models, we utilized SHapley Additive exPlanations (SHAP) for assessing the relative significance of predictor variables and incorporated partial dependence plots (PDPs) to delineate the influence of singular variables on the predictions made by the top performing models. RESULTS For the 1-year survival analysis, 4,913 patients [5.6% with 1-year mortality]; for the 3-year survival analysis, 4,027 patients (11.5% with 3-year mortality]; and for the 5-year survival analysis, 2,854 patients (20.4% with 5-year mortality) were included. The top models achieved AUROCs of 0.938 for 1-year mortality (TabPFN), 0.907 for 3-year mortality (LightGBM), and 0.902 for 5-year mortality (Random Forest). Global SHAP analyses across survival outcomes at different time points identified histology, tumor grade, age, surgery, radiotherapy, and tumor size as the most significant predictor variables for the top-performing models. CONCLUSIONS This study demonstrates ML techniques can develop highly accurate prognostic models for SCG patients with excellent discriminatory ability. The interactive online calculator provides a tool for assessment by physicians (https://huggingface.co/spaces/MSHS-Neurosurgery-Research/NCDB-SCG). Local interpretability informs prediction influences for a given individual. External validation across diverse datasets could further substantiate potential utility and generalizability. This robust, interpretable methodology aligns with the goals of precision medicine, establishing a foundation for continued research leveraging ML's predictive power to enhance patient counseling.
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Affiliation(s)
- Mert Karabacak
- Department of Neurosurgery, Mount Sinai Health System, 1468 Madison Ave, New York, NY, USA
| | - Alexander J Schupper
- Department of Neurosurgery, Mount Sinai Health System, 1468 Madison Ave, New York, NY, USA
| | - Matthew T Carr
- Department of Neurosurgery, Mount Sinai Health System, 1468 Madison Ave, New York, NY, USA
| | - Abhiraj D Bhimani
- Department of Neurosurgery, Mount Sinai Health System, 1468 Madison Ave, New York, NY, USA
| | - Jeremy Steinberger
- Department of Neurosurgery, Mount Sinai Health System, 1468 Madison Ave, New York, NY, USA
| | - Konstantinos Margetis
- Department of Neurosurgery, Mount Sinai Health System, 1468 Madison Ave, New York, NY, USA.
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Morbach C, Moser N, Cejka V, Stach M, Sahiti F, Kerwagen F, Frantz S, Pryss R, Gelbrich G, Heuschmann PU, Störk S. Determinants and reference values of the 6-min walk distance in the general population-results of the population-based STAAB cohort study. Clin Res Cardiol 2024:10.1007/s00392-023-02373-3. [PMID: 38236418 DOI: 10.1007/s00392-023-02373-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 12/31/2023] [Indexed: 01/19/2024]
Abstract
AIMS The 6-min walk test is an inexpensive, safe, and easy tool to assess functional capacity in patients with cardiopulmonary diseases including heart failure (HF). There is a lack of reference values, which are a prerequisite for the interpretation of test results in patients. Furthermore, determinants independent of the respective disease need to be considered when interpreting the 6-min walk distance (6MWD). METHODS The prospective Characteristics and Course of Heart Failure Stages A-B and Determinants of Progression (STAAB) cohort study investigates a representative sample of residents of the City of Würzburg, Germany, aged 30 to 79 years, without a history of HF. Participants underwent detailed clinical and echocardiographic phenotyping as well as a standardized assessment of the 6MWD using a 15-m hallway. RESULTS In a sample of 2762 participants (51% women, mean age 58 ± 11 years), we identified age and height, but not sex, as determinants of the 6MWD. While a worse metabolic profile showed a negative association with the 6MWD, a better systolic and diastolic function showed a positive association with 6MWD. From a subgroup of 681 individuals without any cardiovascular risk factors (60% women, mean age 52 ± 10 years), we computed age- and height-specific reference percentiles. CONCLUSION In a representative sample of the general population free from HF, we identified determinants of the 6MWD implying objective physical fitness associated with metabolic health as well as with cardiac structure and function. Furthermore, we derived reference percentiles applicable when using a 15-m hallway.
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Affiliation(s)
- Caroline Morbach
- Department Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany.
- Department Internal Medicine I, University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany.
| | - Nicola Moser
- Department Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
| | - Vladimir Cejka
- Department Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
- Department Internal Medicine I, University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
| | - Michael Stach
- Institute of Clinical Epidemiology and Biometry, University of Würzburg, Würzburg, Germany
| | - Floran Sahiti
- Department Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
- Department Internal Medicine I, University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
| | - Fabian Kerwagen
- Department Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
- Department Internal Medicine I, University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
| | - Stefan Frantz
- Department Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
- Department Internal Medicine I, University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
| | - Rüdiger Pryss
- Institute of Clinical Epidemiology and Biometry, University of Würzburg, Würzburg, Germany
| | - Götz Gelbrich
- Department Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
- Institute of Clinical Epidemiology and Biometry, University of Würzburg, Würzburg, Germany
- Clinical Trial Center, University Hospital Würzburg, Würzburg, Germany
| | - Peter U Heuschmann
- Department Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
- Institute of Clinical Epidemiology and Biometry, University of Würzburg, Würzburg, Germany
- Clinical Trial Center, University Hospital Würzburg, Würzburg, Germany
| | - Stefan Störk
- Department Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University and University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
- Department Internal Medicine I, University Hospital Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany
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Mühlbäck A, Mana J, Wallner M, Frank W, Lindenberg KS, Hoffmann R, Klempířová O, Klempíř J, Landwehrmeyer GB, Bezdicek O. Establishing normative data for the evaluation of cognitive performance in Huntington's disease considering the impact of gender, age, language, and education. J Neurol 2023; 270:4903-4913. [PMID: 37347292 PMCID: PMC10511566 DOI: 10.1007/s00415-023-11823-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 06/23/2023]
Abstract
BACKGROUND A declining cognitive performance is a hallmark of Huntington's disease (HD). The neuropsychological battery of the Unified HD Rating Scale (UHDRS'99) is commonly used for assessing cognition. However, there is a need to identify and minimize the impact of confounding factors, such as language, gender, age, and education level on cognitive decline. OBJECTIVES Aim is to provide appropriate, normative data to allow clinicians to identify disease-associated cognitive decline in diverse HD populations by compensating for the impact of confounding factors METHODS: Sample data, N = 3267 (60.5% females; mean age of 46.9 years (SD = 14.61, range 18-86) of healthy controls were used to create a normative dataset. For each neuropsychological test, a Bayesian generalized additive model with age, education, gender, and language as predictors was constructed to appropriately stratify the normative dataset. RESULTS With advancing age, there was a non-linear decline in cognitive performance. In addition, performance was dependent on educational levels and language in all tests. Gender had a more limited impact. Standardized scores have been calculated to ease the interpretation of an individual's test outcome. A web-based online tool has been created to provide free access to normative data. CONCLUSION For defined neuropsychological tests, the impact of gender, age, education, and language as factors confounding disease-associated cognitive decline can be minimized at the level of a single patient examination.
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Affiliation(s)
- Alžbeta Mühlbäck
- Department of Neurology, Ulm University, Oberer Eselsberg 45, 89081, Ulm, Germany.
- Huntington Center South, kbo-Isar-Amper-Klinikum, Taufkirchen, Germany.
- Department of Neurology and Center of Clinical Neuroscience, 1st Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czechia.
| | - Josef Mana
- Department of Neurology and Center of Clinical Neuroscience, 1st Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czechia
| | | | - Wiebke Frank
- Department of Neurology, Ulm University, Oberer Eselsberg 45, 89081, Ulm, Germany
| | - Katrin S Lindenberg
- Department of Neurology, Ulm University, Oberer Eselsberg 45, 89081, Ulm, Germany
| | - Rainer Hoffmann
- Huntington Center South, kbo-Isar-Amper-Klinikum, Taufkirchen, Germany
| | - Olga Klempířová
- Department of Neurology and Center of Clinical Neuroscience, 1st Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czechia
| | - Jiří Klempíř
- Department of Neurology and Center of Clinical Neuroscience, 1st Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czechia
| | | | - Ondrej Bezdicek
- Department of Neurology and Center of Clinical Neuroscience, 1st Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czechia
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Alaimo L, Lima HA, Moazzam Z, Endo Y, Yang J, Ruzzenente A, Guglielmi A, Aldrighetti L, Weiss M, Bauer TW, Alexandrescu S, Poultsides GA, Maithel SK, Marques HP, Martel G, Pulitano C, Shen F, Cauchy F, Koerkamp BG, Endo I, Kitago M, Pawlik TM. Development and Validation of a Machine-Learning Model to Predict Early Recurrence of Intrahepatic Cholangiocarcinoma. Ann Surg Oncol 2023; 30:5406-5415. [PMID: 37210452 DOI: 10.1245/s10434-023-13636-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 04/26/2023] [Indexed: 05/22/2023]
Abstract
BACKGROUND The high incidence of early recurrence after hepatectomy for intrahepatic cholangiocarcinoma (ICC) has a detrimental effect on overall survival (OS). Machine-learning models may improve the accuracy of outcome prediction for malignancies. METHODS Patients who underwent curative-intent hepatectomy for ICC were identified using an international database. Three machine-learning models were trained to predict early recurrence (< 12 months after hepatectomy) using 14 clinicopathologic characteristics. The area under the receiver operating curve (AUC) was used to assess their discrimination ability. RESULTS In this study, 536 patients were randomly assigned to training (n = 376, 70.1%) and testing (n = 160, 29.9%) cohorts. Overall, 270 (50.4%) patients experienced early recurrence (training: n = 150 [50.3%] vs testing: n = 81 [50.6%]), with a median tumor burden score (TBS) of 5.6 (training: 5.8 [interquartile range {IQR}, 4.1-8.1] vs testing: 5.5 [IQR, 3.7-7.9]) and metastatic/undetermined nodes (N1/NX) in the majority of the patients (training: n = 282 [75.0%] vs testing n = 118 [73.8%]). Among the three different machine-learning algorithms, random forest (RF) demonstrated the highest discrimination in the training/testing cohorts (RF [AUC, 0.904/0.779] vs support vector machine [AUC, 0.671/0.746] vs logistic regression [AUC, 0.668/0.745]). The five most influential variables in the final model were TBS, perineural invasion, microvascular invasion, CA 19-9 lower than 200 U/mL, and N1/NX disease. The RF model successfully stratified OS relative to the risk of early recurrence. CONCLUSIONS Machine-learning prediction of early recurrence after ICC resection may inform tailored counseling, treatment, and recommendations. An easy-to-use calculator based on the RF model was developed and made available online.
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Affiliation(s)
- Laura Alaimo
- Division of Surgical Oncology, Department of Surgery, The Ohio State University Wexner Medical Center and James Comprehensive Cancer Center, Columbus, OH, USA
- Department of Surgery, University of Verona, Verona, Italy
| | - Henrique A Lima
- Division of Surgical Oncology, Department of Surgery, The Ohio State University Wexner Medical Center and James Comprehensive Cancer Center, Columbus, OH, USA
| | - Zorays Moazzam
- Division of Surgical Oncology, Department of Surgery, The Ohio State University Wexner Medical Center and James Comprehensive Cancer Center, Columbus, OH, USA
| | - Yutaka Endo
- Division of Surgical Oncology, Department of Surgery, The Ohio State University Wexner Medical Center and James Comprehensive Cancer Center, Columbus, OH, USA
| | - Jason Yang
- Division of Surgical Oncology, Department of Surgery, The Ohio State University Wexner Medical Center and James Comprehensive Cancer Center, Columbus, OH, USA
| | | | | | | | - Matthew Weiss
- Department of Surgery, Johns Hopkins Hospital, Baltimore, MD, USA
| | - Todd W Bauer
- Department of Surgery, University of Virginia, Charlottesville, VA, USA
| | | | | | | | - Hugo P Marques
- Department of Surgery, Curry Cabral Hospital, Lisbon, Portugal
| | | | - Carlo Pulitano
- Department of Surgery, Royal Prince Alfred Hospital, University of Sydney, Sydney, NSW, Australia
| | - Feng Shen
- Department of Surgery, Eastern Hepatobiliary Surgery Hospital, Shanghai, China
| | - François Cauchy
- Department of Hepatobiliopancreatic Surgery and Liver Transplantation, AP-HP, Beaujon Hospital, Clichy, France
| | - Bas Groot Koerkamp
- Department of Surgery, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Itaru Endo
- Department of Gastroenterological Surgery, Yokohama City University School of Medicine, Yokohama, Japan
| | - Minoru Kitago
- Department of Surgery, Keio University, Tokyo, Japan
| | - Timothy M Pawlik
- Division of Surgical Oncology, Department of Surgery, The Ohio State University Wexner Medical Center and James Comprehensive Cancer Center, Columbus, OH, USA.
- Department of Surgery, The Urban Meyer III and Shelley Meyer Chair for Cancer Research, The Ohio State University, Wexner Medical Center, Columbus, OH, USA.
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Wang YD, Wu J, Huang BY, Guo CM, Wang CH, Su H, Liu H, Wang MM, Wang J, Li L, Ding PP, Meng MM. Development and validation of an online calculator to predict the pathological nature of colorectal tumors. World J Gastrointest Oncol 2023; 15:1271-1282. [PMID: 37546551 PMCID: PMC10401472 DOI: 10.4251/wjgo.v15.i7.1271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 04/27/2023] [Accepted: 05/22/2023] [Indexed: 07/12/2023] Open
Abstract
BACKGROUND No single endoscopic feature can reliably predict the pathological nature of colorectal tumors (CRTs).
AIM To establish and validate a simple online calculator to predict the pathological nature of CRTs based on white-light endoscopy.
METHODS This was a single-center study. During the identification stage, 530 consecutive patients with CRTs were enrolled from January 2015 to December 2021 as the derivation group. Logistic regression analysis was performed. A novel online calculator to predict the pathological nature of CRTs based on white-light images was established and verified internally. During the validation stage, two series of 110 images obtained using white-light endoscopy were distributed to 10 endoscopists [five highly experienced endoscopists and five less experienced endoscopists (LEEs)] for external validation before and after systematic training.
RESULTS A total of 750 patients were included, with an average age of 63.6 ± 10.4 years. Early colorectal cancer (ECRC) was detected in 351 (46.8%) patients. Tumor size, left semicolon site, rectal site, acanthosis, depression and an uneven surface were independent risk factors for ECRC. The C-index of the ECRC calculator prediction model was 0.906 (P = 0.225, Hosmer–Lemeshow test). For the LEEs, significant improvement was made in the sensitivity, specificity and accuracy (57.6% vs 75.5%; 72.3% vs 82.4%; 64.2% vs 80.2%; P < 0.05), respectively, after training with the ECRC online calculator prediction model.
CONCLUSION A novel online calculator including tumor size, location, acanthosis, depression, and uneven surface can accurately predict the pathological nature of ECRC.
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Affiliation(s)
- Ya-Dan Wang
- Department of Gastroenterology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - Jing Wu
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Diseases, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Diseases, Beijing 100050, China
| | - Bo-Yang Huang
- Department of Gastroenterology, Beijing Shijitan Hospital, the Ninth Clinical Medicine Peking University, Beijing 100038, China
| | - Chun-Mei Guo
- Department of Gastroenterology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - Cang-Hai Wang
- Department of Gastroenterology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - Hui Su
- Department of Gastroenterology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - Hong Liu
- Department of Gastroenterology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - Miao-Miao Wang
- Department of Gastroenterology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - Jing Wang
- Department of Gastroenterology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - Li Li
- Department of Gastroenterology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - Peng-Peng Ding
- Department of Gastroenterology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - Ming-Ming Meng
- Department of Gastroenterology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
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Aljasser F, Vitevitch MS. A web-based interface to calculate phonological neighborhood density for words and nonwords in Modern Standard Arabic. Behav Res Methods 2022; 54:2740-2749. [PMID: 35014005 PMCID: PMC9729137 DOI: 10.3758/s13428-021-01713-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/15/2021] [Indexed: 12/16/2022]
Abstract
The availability of online databases (e.g., Balota et al., 2007) and calculators (e.g., Storkel & Hoover, 2010) has contributed to an increase in psycholinguistic-related research, to the development of evidence-based treatments in clinical settings, and to scientifically supported training programs in the language classroom. The benefit of online language resources is limited by the fact that the majority of such resources provide information only for the English language (Vitevitch, Chan & Goldstein, 2014). To address the lack of diversity in these resources for languages that differ phonologically and morphologically from English, the present article describes an online database to compute phonological neighborhood density (i.e., the number of words that sound similar to a given word) for words and nonwords in Modern Standard Arabic (MSA). A full description of how the calculator can be used is provided. It can be freely accessed at https://calculator.ku.edu/density/about .
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Affiliation(s)
- Faisal Aljasser
- Department of English Language and Translation, College of Arabic Language and Social Studies, Qassim University, Buraydah, 52571, Saudi Arabia
| | - Michael S Vitevitch
- Spoken Language Laboratory, Department of Psychology, University of Kansas, 1415 Jayhawk Blvd, Lawrence, KS, 66045, USA.
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Aljasser F, Vitevitch MS. A Web-based interface to calculate phonotactic probability for words and nonwords in Modern Standard Arabic. Behav Res Methods 2018; 50:313-22. [PMID: 28342073 DOI: 10.3758/s13428-017-0872-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A number of databases (Storkel Behavior Research Methods, 45, 1159-1167, 2013) and online calculators (Vitevitch & Luce Behavior Research Methods, Instruments, and Computers, 36, 481-487, 2004) have been developed to provide statistical information about various aspects of language, and these have proven to be invaluable assets to researchers, clinicians, and instructors in the language sciences. The number of such resources for English is quite large and continues to grow, whereas the number of such resources for other languages is much smaller. This article describes the development of a Web-based interface to calculate phonotactic probability in Modern Standard Arabic (MSA). A full description of how the calculator can be used is provided. It can be freely accessed at http://phonotactic.drupal.ku.edu/ .
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