keyword
MENU ▼
Read by QxMD icon Read
search

Calibration logistic regression

keyword
https://www.readbyqxmd.com/read/28911878/comparison-of-proposed-countermeasures-for-dilemma-zone-at-signalized-intersections-based-on-cellular-automata-simulations
#1
Yina Wu, Mohamed Abdel-Aty, Yaoxian Ding, Bin Jia, Qi Shi, Xuedong Yan
The Type II dilemma zone describes the road segment to a signalized intersection where drivers have difficulties to decide either stop or go at the onset of yellow signal. Such phenomenon can result in an increased crash risk at signalized intersections. Different types of warning systems have been proposed to help drivers make decisions. Although the warning systems help to improve drivers' behavior, they also have several disadvantages such as increasing rear-end crashes or red-light running (RLR) violations...
September 11, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28906306/predicting-early-mortality-following-hip-fracture-surgery-the-hip-fracture-estimator-of-mortality-amsterdam-hema
#2
Julian Karres, Noera Kieviet, Jan-Peter Eerenberg, Bart C Vrouenraets
OBJECTIVES: Early mortality following hip fracture surgery is high and pre-operative risk assessment for the individual patient is challenging. A risk model could identify patients in need of more intensive perioperative care, provide insight in the prognosis and allow for risk-adjustment in audits. This study aimed to develop and validate a risk prediction model for 30-day mortality following hip fracture surgery: the Hip fracture Estimator of Mortality Amsterdam (HEMA). METHODS: Data on 1050 consecutive patients undergoing hip fracture surgery between 2004 and 2010 were retrospectively collected and randomly split into a development cohort (746 patients) and validation cohort (304 patients)...
September 11, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28892454/disease-staging-and-prognosis-in-smokers-using-deep-learning-in-chest-computed-tomography
#3
Germán González, Samuel Y Ash, Gonzalo Vegas Sanchez-Ferrero, Jorge Onieva Onieva, Farbod N Rahaghi, James C Ross, Alejandro Díaz, Raúl San José Estépar, George R Washko
RATIONALE: Deep learning is a powerful tool that may allow for improved outcome prediction. OBJECTIVES: To determine if deep learning, specifically convolutional neural network (CNN) analysis, could detect and stage chronic obstructive pulmonary disease (COPD) and predict acute respiratory disease events (ARD) and mortality in smokers. METHODS: A CNN was trained using CT scans from 7,983 COPDGene participants and evaluated using 1000 non-overlapping COPDGene participants and 1,672 ECLIPSE participants...
September 11, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28882885/modeling-major-adverse-outcomes-of-pediatric-and-adult-patients-with-congenital-heart-disease-undergoing-cardiac-catheterization-observations-from-the-ncdr-impact-registry
#4
Natalie Jayaram, John A Spertus, Kevin F Kennedy, Robert Vincent, Gerard R Martin, Jeptha P Curtis, David G Nykanen, Phillip M Moore, Lisa Bergersen
Background -Risk-standardization for adverse events following congenital cardiac catheterization is needed to equitably compare patient outcomes among different hospitals as a foundation for quality improvement. The goal of this project was to develop a risk-standardization methodology to adjust for patient characteristics when comparing major adverse outcomes in the NCDR® IMPACT(TM) (Improving Pediatric and Adult Congenital Treatment) Registry. Methods -39,725 consecutive patients within IMPACT undergoing cardiac catheterization between January 2011 and March 2014 were identified...
September 7, 2017: Circulation
https://www.readbyqxmd.com/read/28876374/do-we-need-to-personalize-renal-function-assessment-in-the-stratification-of-patients-undergoing-cardiac-surgery
#5
Camila P S Arthur, Omar A V Mejia, Diogo Osternack, Marcelo Arruda Nakazone, Maxim Goncharov, Luiz A F Lisboa, Luís A O Dallan, Pablo M A Pomerantzeff, Fabio B Jatene
BACKGROUND: Renal dysfunction is an independent predictor of morbidity and mortality in cardiac surgery. For a better assessment of renal function, calculation of creatinine clearance (CC) may be necessary. OBJECTIVE: To objectively evaluate whether CC is a better risk predictor than serum creatinine (SC) in patients undergoing cardiac surgery. METHODS: Analysis of 3,285 patients registered in a prospective, consecutive and mandatory manner in the Sao Paulo Registry of Cardiovascular Surgery (REPLICCAR) between November 2013 and January 2015...
September 4, 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28874414/a-radiomics-nomogram-for-the-preoperative-prediction-of-lymph-node-metastasis-in-bladder-cancer
#6
Shaoxu Wu, Junjiong Zheng, Yong Li, Hao Yu, Siya Shi, Weibin Xie, Hao Liu, Yangfan Su, Jian Huang, Tianxin Lin
PURPOSE: To develop and validate a radiomics nomogram for the preoperative prediction of lymph node (LN) metastasis in bladder cancer. EXPERIMENTAL DESIGN: One hundred and eighteen eligible bladder cancer patients were divided into a training set (n =80) and a validation set (n =38). Radiomics features were extracted from arterial-phase computed tomography (CT) images of each patient. A radiomics signature was then constructed with the least absolute shrinkage and selection operator algorithm in the training set...
September 5, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28870253/early-presence-of-anti-angiogenesis-related-adverse-events-as-a-potential-biomarker-of-antitumor-efficacy-in-metastatic-gastric-cancer-patients-treated-with-apatinib-a-cohort-study
#7
Xinyang Liu, Shukui Qin, Zhichao Wang, Jianming Xu, Jianping Xiong, Yuxian Bai, Zhehai Wang, Yan Yang, Guoping Sun, Liwei Wang, Leizhen Zheng, Nong Xu, Ying Cheng, Weijian Guo, Hao Yu, Tianshu Liu, Pagona Lagiou, Jin Li
BACKGROUND: Reliable biomarkers of apatinib response in gastric cancer (GC) are lacking. We investigated the association between early presence of common adverse events (AEs) and clinical outcomes in metastatic GC patients. PATIENTS AND METHODS: We conducted a retrospective cohort study using data on 269 apatinib-treated GC patients in two clinical trials. AEs were assessed at baseline until 28 days after the last dose of apatinib. Clinical outcomes were compared between patients with and without hypertension (HTN), proteinuria, or hand and foot syndrome (HFS) in the first 4 weeks...
September 5, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28867312/models-of-mortality-and-morbidity-in-severe-traumatic-brain-injury-an-analysis-of-a-singapore-neurotrauma-database
#8
Julian Xinguang Han, Angela An Qi See, Mihir Gandhi, Nicolas Kon Kam King
OBJECTIVE: Current prognostic models for traumatic brain injury (TBI) available for use are developed from diverse historical datasets. We aim to construct a prognostication tool for severe TBI as it is this group who would benefit the most from an accurate model. METHODS: Model development was based on a cohort of 300 patients with severe TBI (Glasgow Coma Score [GCS] ≤ 8) consecutively admitted to a neurosurgical intensive care unit in the National Neuroscience Institute (NNI), Singapore, between February 2006 and December 2009...
August 31, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28865067/predictors-of-cpap-compliance-in-different-clinical-settings-primary-care-versus-sleep-unit
#9
Núria Nadal, Jordi de Batlle, Ferran Barbé, Josep Ramon Marsal, Alicia Sánchez-de-la-Torre, Nuria Tarraubella, Merce Lavega, Manuel Sánchez-de-la-Torre
BACKGROUND: Good adherence to continuous positive airway pressure (CPAP) treatment improves the patient's quality of life and decreases the risk of cardiovascular disease. Previous studies that have analyzed the adherence to CPAP were performed in a sleep unit (SU) setting. The involvement of primary care (PC) in the management of obstructive sleep apnea (OSA) patients receiving CPAP treatment could introduce factors related to the adherence to treatment. OBJECTIVES: The objective was to compare the baseline predictors of CPAP compliance in SU and PC settings...
September 1, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28861688/predicting-major-adverse-kidney-events-among-critically-ill%C3%A2-adults-using-the-electronic-health-record
#10
Andrew C McKown, Li Wang, Jonathan P Wanderer, Jesse Ehrenfeld, Todd W Rice, Gordon R Bernard, Matthew W Semler
Prediction of major adverse kidney events in critically ill patients may help target therapy, allow risk adjustment, and facilitate the conduct of clinical trials. In a cohort comprised of all critically ill adults admitted to five intensive care units at a single tertiary care center over one year, we developed a logistic regression model for the outcome of Major Adverse Kidney Events within 30 days (MAKE30), the composite of persistent renal dysfunction, new renal replacement therapy (RRT), and in-hospital mortality...
August 31, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28859138/inflammatory-bowel-disease-and-patterns-of-volatile-organic-compounds-in-the-exhaled-breath-of-children-a-case-control-study-using-ion-molecule-reaction-mass-spectrometry
#11
Lorenzo Monasta, Chiara Pierobon, Andrea Princivalle, Stefano Martelossi, Annalisa Marcuzzi, Francesco Pasini, Luigi Perbellini
Inflammatory bowel diseases (IBD) profoundly affect quality of life and have been gradually increasing in incidence, prevalence and severity in many areas of the world, and in children in particular. Patients with suspected IBD require careful history and clinical examination, while definitive diagnosis relies on endoscopic and histological findings. The aim of the present study was to investigate whether the alveolar air of pediatric patients with IBD presents a specific volatile organic compounds' (VOCs) pattern when compared to controls...
2017: PloS One
https://www.readbyqxmd.com/read/28843035/risk-prediction-of-post-hepatectomy-liver-failure-in-patients-with-perihilar-cholangiocarcinoma
#12
Eung Chang Lee, Sang-Jae Park, Sung-Sik Han, Jae Ryong Shim, Hyeong Min Park, Seung Duk Lee, Seong Hoon Kim
BACKGROUND AND AIM: In most patients with perihilar cholangiocarcinoma (PHCC), major hepatectomy and extrahepatic bile duct resection are needed for surgical radicality, and a high risk of hepatic insufficiency exists. This study aims to develop a prediction model for post-hepatectomy liver failure (PHLF) in patients with PHCC. METHODS: A total of 143 patients who underwent major liver resection and extrahepatic bile duct resection for PHCC between October 2001 and December 2013 were included...
August 26, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28837558/the-prevalence-and-incidence-of-active-syphilis-in-women-in-morocco-1995-2016-model-based-estimation-and-implications-for-sti-surveillance
#13
Aziza Bennani, Amina El-Kettani, Amina Hançali, Houssine El-Rhilani, Kamal Alami, Mohamed Youbi, Jane Rowley, Laith Abu-Raddad, Alex Smolak, Melanie Taylor, Guy Mahiané, John Stover, Eline L Korenromp
BACKGROUND: Evolving health priorities and resource constraints mean that countries require data on trends in sexually transmitted infections (STI) burden, to inform program planning and resource allocation. We applied the Spectrum STI estimation tool to estimate the prevalence and incidence of active syphilis in adult women in Morocco over 1995 to 2016. The results from the analysis are being used to inform Morocco's national HIV/STI strategy, target setting and program evaluation. METHODS: Syphilis prevalence levels and trends were fitted through logistic regression to data from surveys in antenatal clinics, women attending family planning clinics and other general adult populations, as available post-1995...
2017: PloS One
https://www.readbyqxmd.com/read/28835223/development-of-nomograms-to-predict-axillary-lymph-node-status-in-breast-cancer-patients
#14
Kai Chen, Jieqiong Liu, Shunrong Li, Lisa Jacobs
BACKGROUND: Prediction of axillary lymph node (ALN) status preoperatively is critical in the management of breast cancer patients. This study aims to develop a new set of nomograms to accurately predict ALN status. METHODS: We searched the National Cancer Database to identify eligible female breast cancer patients with profiles containing critical information. Patients diagnosed in 2010-2011 and 2012-2013 were designated the training (n = 99,618) and validation (n = 101,834) cohorts, respectively...
August 23, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28818874/airway-calibre-variation-is-a-major-determinant-of-exhaled-nitric-oxide-s-ability-to-capture-asthma-control
#15
Alain Michils, Amaryllis Haccuria, Sebastien Michiels, Alain Van Muylem
Changes in airway calibre have the potential to modify exhaled nitric oxide fraction (FENO) values and could hamper how FENO captures changes in asthma control. Here, our objective was to assess whether forced expiratory volume in 1 s (FEV1) variations alter the ability of FENO to reflect asthma control.FENO, asthma control (Asthma Control Questionnaire (ACQ)) and FEV1 were measured at least two times in 527 patients during 1819 pairs of visits. Determinants of FENO-ACQ discordance probability were evaluated through a logistic regression analysis...
August 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28804727/development-of-a-prediction-model-for-stress-fracture-during-an-intensive-physical-training-program-the-royal-marines-commandos
#16
Maria T Sanchez-Santos, Trish Davey, Kirsten M Leyland, Adrian J Allsopp, Susan A Lanham-New, Andrew Judge, Nigel K Arden, Joanne L Fallowfield
BACKGROUND: Stress fractures (SFs) are one of the more severe overuse injuries in military training, and therefore, knowledge of potential risk factors is needed to assist in developing mitigating strategies. PURPOSE: To develop a prediction model for risk of SF in Royal Marines (RM) recruits during an arduous military training program. STUDY DESIGN: Case-control study; Level of evidence, 3. METHODS: RM recruits (N = 1082; age range, 16-33 years) who enrolled between September 2009 and July 2010 were prospectively followed through the 32-week RM training program...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28799112/the-dgav-risk-calculator-development-and-validation-of-statistical-models-for-a-web-based-instrument-predicting-complications-of-colorectal-cancer-surgery
#17
Alexander Crispin, Carsten Klinger, Anna Rieger, Brigitte Strahwald, Kai Lehmann, Heinz-Johannes Buhr, Ulrich Mansmann
PURPOSE: The purpose of this study is to provide a web-based calculator predicting complication probabilities of patients undergoing colorectal cancer (CRC) surgery in Germany. METHODS: Analyses were based on records of first-time CRC surgery between 2010 and February 2017, documented in the database of the Study, Documentation, and Quality Center (StuDoQ) of the Deutsche Gesellschaft für Allgemein- und Viszeralchirurgie (DGAV), a registry of CRC surgery in hospitals throughout Germany, covering demography, medical history, tumor features, comorbidity, behavioral risk factors, surgical procedures, and outcomes...
August 10, 2017: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/28783754/cardiac-arrest-risk-standardization-using-administrative-data-compared-to-registry-data
#18
Anne V Grossestreuer, David F Gaieski, Michael W Donnino, Joshua I M Nelson, Eric L Mutter, Brendan G Carr, Benjamin S Abella, Douglas J Wiebe
BACKGROUND: Methods for comparing hospitals regarding cardiac arrest (CA) outcomes, vital for improving resuscitation performance, rely on data collected by cardiac arrest registries. However, most CA patients are treated at hospitals that do not participate in such registries. This study aimed to determine whether CA risk standardization modeling based on administrative data could perform as well as that based on registry data. METHODS AND RESULTS: Two risk standardization logistic regression models were developed using 2453 patients treated from 2000-2015 at three hospitals in an academic health system...
2017: PloS One
https://www.readbyqxmd.com/read/28753099/receiver-operating-characteristic-roc-curve-based-prediction-model-for-periodontal-disease-updated-with-the-calibrated-community-periodontal-index
#19
Chiu-Wen Su, Amy Ming-Fang Yen, Hongmin Lai, Hsiu-Hsi Chen, Sam Li-Sheng Chen
Background The accuracy of a prediction model for periodontal disease using the community periodontal index (CPI) has been undertaken by using an area receiver operating characteristics (AUROC) curve, but how the uncalibrated CPI, as measured by general dentists trained by periodontists in a large epidemiological study, required for constructing a prediction model that affects its performance has not been researched yet. Methods We conducted a two-stage design by first proposing a validation study to calibrate the CPI between a senior periodontal specialist and trained general dentists who measured CPIs in the main study of a nationwide survey...
July 28, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28747039/prior-beta-blockers-use-is-independently-associated-with-increased-inpatient-mortality-in-patients-presenting-with-acute-myocardial-infarction
#20
Yan Zhou, Suzhen Chen, Xiang Zhu, Junhong Gui, Khalid Abusaada
BACKGROUND: Beta blockers (BBs) are recommended for patients presenting with acute myocardial infarction. However, the effects of prior BBs use on inpatient mortality in patients presenting with acute myocardial infarction (AMI) are unknown. METHODS: This was a retrospective cohort study of patients presenting with AMI in Florida Hospital Orlando from January 1, 2013 to December 31, 2014. Data were collected prospectively, as part of the Acute Coronary Treatment and Intervention Outcomes Network (ACTION) Registry...
September 15, 2017: International Journal of Cardiology
keyword
keyword
24268
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"