This document summarizes a student project on stroke prediction using machine learning algorithms. The students collected two datasets on stroke from Kaggle, one benchmark and one non-benchmark. They preprocessed the data, addressed imbalance, and performed feature engineering. Various classification algorithms were tested on the data, including KNN, decision trees, SVM, and Naive Bayes. The results were evaluated to determine the most accurate model for predicting stroke risk based on attributes like age, gender, medical history, and lifestyle factors. The project aims to help identify individuals at high risk of stroke so preventative actions can be taken.
The document provides an overview of the Natural Language Toolkit (NLTK), an open-source Python library for processing human language data. It covers installation, basic operations such as tokenization and stemming, and applications of NLTK in various NLP tasks including machine translation and text classification. Additionally, it discusses challenges in NLP and offers practical examples for using NLTK functionalities in Python.
Natural Language Processing In HealthcareLaxmiMPriya
?
Natural language processing (NLP) can transform unstructured healthcare data into meaningful insights, enhancing clinical documentation and improving patient care decisions. It helps streamline and visualize data, reducing clinician time spent on paperwork and minimizing errors, ultimately lowering healthcare costs. NLP technology also assists in fostering health literacy and allows healthcare professionals to focus more on patient interactions by automating repetitive tasks.
The document discusses medical practice as a recommender system. It outlines how medical decisions can be improved with recommender systems by making better use of data through algorithms and machine learning to provide more personalized recommendations. Current medical decision support systems are discussed, including knowledge-based approaches built from medical literature and data from electronic health records and ontologies. Machine learning techniques can be used to build diagnostic systems from data. The company Curai is working on combining AI/ML with good UX to build a medical tool for patients, leveraging techniques discussed in the document. Challenges include algorithmic approaches, data quality and bias, trustworthy UX, and legal issues. Medicine is an area that can greatly benefit from recommender system approaches
This document provides an overview of bag-of-words models for image classification. It discusses how bag-of-words models originated from texture recognition and document classification. Images are represented as histograms of visual word frequencies. A visual vocabulary is learned by clustering local image features, and each cluster center becomes a visual word. Both discriminative methods like support vector machines and generative methods like Naive Bayes are used to classify images based on their bag-of-words representations.
Disease prediction system using python.pptxKeshavRaoPilli
?
1) Disease prediction using machine learning plays a crucial role in healthcare by enabling early detection of health issues through analyzing large datasets and identifying risk factors.
2) Data is collected from various sources like electronic health records, medical imaging, genomic data, and wearable devices, then preprocessed through cleaning, feature extraction, and normalization.
3) Predictive analytics and machine learning algorithms are used to identify patterns and predict diseases like heart disease, diabetes, and Parkinson's disease from the data, helping improve prevention and treatment.
The document presents a project on predicting brain strokes using various machine learning techniques, highlighting the development of a user-friendly application. It discusses the limitations of existing predictive systems and proposes an AI-based model that improves accuracy and efficiency in detecting stroke risks. The model's performance is evaluated through several algorithms, achieving an average accuracy of 96.68% with XGBoost being the most effective.
The document discusses PyCaret, an open-source, low-code machine learning library designed for automating machine learning workflows, with applications in various sectors including healthcare and fintech. It outlines the machine learning life cycle, highlights the challenges faced during the process, and presents PyCaret's capabilities such as model selection, training, and hyperparameter tuning. Additionally, it provides links to resources, demos, and industry-related feedback avenues.
This document provides guidance on performing and interpreting logistic regression analyses in SPSS. It discusses selecting appropriate statistical tests based on variable types and study objectives. It covers assumptions of logistic regression like linear relationships between predictors and the logit of the outcome. It also explains maximum likelihood estimation, interpreting coefficients, and evaluating model fit and accuracy. Guidelines are provided on reporting logistic regression results from SPSS outputs.
This document discusses statistical tests for analyzing categorical data. It begins by defining categorical variables and the prerequisites for selecting a statistical test. It then outlines various bivariate and multivariate tests that can be used for unpaired and paired categorical data, including chi-square tests, Fisher's exact test, McNemar's test, and logistic regression. It also discusses measures of association like odds ratios. Examples are provided to illustrate McNemar's test and calculating interrater reliability using Cohen's kappa. The document concludes by emphasizing the importance of selecting the appropriate statistical method based on one's data and checking assumptions.
This document discusses logistic regression, including:
- Logistic regression can be used when the dependent variable is binary and predicts the probability of an event occurring.
- The logistic regression equation calculates the log odds of an event occurring based on independent variables.
- Logistic regression is commonly used in medical research when variables are a mix of categorical and continuous.
This document discusses using SPSS to conduct a chi-square test of independence. It provides an example of testing whether there is an association between area of residence (urban vs. rural) and BMI categories (normal weight vs. overweight/obese). The chi-square test involves stating hypotheses, calculating expected and observed frequencies, computing the test statistic in SPSS, and making a decision. No significant relationship was found between gender and BMI categories in another example exercise.
Spss data analysis for univariate, bivariate and multivariate statistics by d...Dr. Sola Maitanmi
?
This chapter provides an overview of statistical principles and modeling. The goals of statistical modeling are to describe sample data and make inferences about the underlying population. Inferential statistics are used to estimate population parameters based on sample statistics. Statistical tests indicate if observed effects in a sample could plausibly occur by chance or suggest an effect in the population. The appropriate statistical model depends on the type of data, such as using t-tests and ANOVA for mean differences or correlation/regression for relationships between continuous variables. Overall, statistical analysis involves sampling data, applying a model, and evaluating model fit and inferences that can be made about the population.
Chap XI : Outils de Simulation des modes opératoires (Plans d’expériences)Mohammed TAMALI
?
Ce document décrit les outils de simulation des modes opératoires et les plans d'expériences utilisés pour étudier les systèmes en zones arides, notamment dans le cadre de la recherche menée à l'université de Béchar. Il aborde les concepts fondamentaux de la modélisation et de la statistique, ainsi que l'importance des plans d'expériences pour optimiser les essais expérimentaux dans divers domaines industriels. La méthode des plans d'expériences, développée par Ronald Fisher, est mise en avant comme un moyen d'améliorer la qualité et de réduire les co?ts dans la recherche et l'industrie.
The document discusses multiple statistical comparisons and techniques for controlling error rates when performing multiple hypothesis tests on data. It introduces the concepts of family-wise error rate (FWER) and false discovery rate (FDR), and methods like the Sidak correction, Bonferroni correction, and Benjamini-Hochberg procedure for controlling FWER and FDR. It also discusses how p-value distributions can be used to estimate FDR and calculate q-values. Interactive demonstrations are provided to help illustrate key concepts like Type I and Type II errors.
Powerpoint Presentation: research design using quantitative methoddianakamaruddin
?
This document outlines the key stages and considerations in experimental research design using quantitative methods, including developing research questions and hypotheses, identifying variables, sampling strategies, instrument design, statistical analysis, and reporting findings. The main stages discussed are identifying issues, reviewing literature, developing testable questions/hypotheses, identifying independent and dependent variables, research implementation, analyzing results statistically, and preparing a formal report. Experimental designs aim to test hypotheses by manipulating independent variables and measuring effects on dependents, while quasi-experimental designs have less control. Research instruments require validity to accurately measure concepts and reliability to consistently do so.
Logistic regression is used to predict categorical outcomes. The presented document discusses logistic regression, including its objectives, assumptions, key terms, and an example application to predicting basketball match outcomes. Logistic regression uses maximum likelihood estimation to model the relationship between a binary dependent variable and independent variables. The document provides an illustrated example of conducting logistic regression in SPSS to predict match results based on variables like passes, rebounds, free throws, and blocks.
This dissertation defense investigates the concept of entrepreneurial orientation (EO) through a phenomenological lens, focusing on the lived experiences of founder-owners of private companies. It seeks to clarify the sources, dimensions, and manifestations of EO, suggesting it is both an aspirational and dispositional phenomenon that impacts long-term business success. The study emphasizes the need for qualitative research in IO psychology to enhance understanding of EO and its practical applications in the entrepreneurial context.
The document discusses the odds ratio (OR) as a statistical measure used in clinical research to compare the odds of an event occurring in exposed versus unexposed groups. It explains how to calculate the OR, interpret its value, and utilize it in case-control studies, highlighting its importance in determining risk factors. The article also mentions the use of online calculators for OR computation and addresses the significance testing of OR values.
Chapter 6 part2-Introduction to Inference-Tests of Significance, Stating Hyp...nszakir
?
The document discusses the concepts of statistical inference, specifically confidence intervals and tests of significance, detailing their purposes and the procedures involved. It explains the importance of stating hypotheses, calculating test statistics, and interpreting p-values with examples, such as the Cobra Cheese Company assessing milk quality and quality control in a food company. The text outlines the steps for conducting significance tests and the conditions for determining statistical significance based on p-values and significance levels.
This document discusses recent developments in causal inference methods. It contains summaries of talks on several causal inference topics:
1. Miguel Hernan discusses the g-formula approach and inverse probability weighting for estimating causal effects under confounding.
2. Judith Lok discusses marginal structural models and g-estimation of structural nested models for longitudinal data, which allow controlling for time-varying confounding.
3. James Robins discusses single world intervention graphs for representing counterfactuals and the g-formula for estimating effects of dynamic treatment regimes.
4. Tyler VanderWeele discusses approaches for causal mediation analysis, including the difference method and natural direct and indirect effects.
This thesis defense evaluates the potential of Rapid Impact Compaction (RIC) for transportation infrastructure projects, highlighting obstacles to its adoption such as lack of established design procedures and long-term performance data. The research objectives include expanding the knowledge base and assessing applicability of RIC in civil engineering, supported by detailed case histories. Recommendations for overcoming barriers to implementation and improving QC/QA procedures are also presented.
Logistic Regression in Case-Control StudySatish Gupta
?
This document provides an introduction to using logistic regression in R to analyze case-control studies. It explains how to download and install R, perform basic operations and calculations, handle data, load libraries, and conduct both conditional and unconditional logistic regression. Conditional logistic regression is recommended for matched case-control studies as it provides unbiased results. The document demonstrates how to perform logistic regression on a lung cancer dataset to analyze the association between disease status and genetic and environmental factors.
The document discusses generalized linear models (GLMs) and provides examples of logistic regression and Poisson regression. Some key points covered include:
- GLMs allow for non-normal distributions of the response variable and non-constant variance, which makes them useful for binary, count, and other types of data.
- The document outlines the framework for GLMs, including the link function that transforms the mean to the scale of the linear predictor and the inverse link that transforms it back.
- Logistic regression is presented as a GLM example for binary data with a logit link function. Poisson regression is given for count data with a log link.
- Examples are provided to demonstrate how to fit and interpret a logistic
This document provides guidance on performing and interpreting logistic regression analyses in SPSS. It discusses selecting appropriate statistical tests based on variable types and study objectives. It covers assumptions of logistic regression like linear relationships between predictors and the logit of the outcome. It also explains maximum likelihood estimation, interpreting coefficients, and evaluating model fit and accuracy. Guidelines are provided on reporting logistic regression results from SPSS outputs.
This document discusses statistical tests for analyzing categorical data. It begins by defining categorical variables and the prerequisites for selecting a statistical test. It then outlines various bivariate and multivariate tests that can be used for unpaired and paired categorical data, including chi-square tests, Fisher's exact test, McNemar's test, and logistic regression. It also discusses measures of association like odds ratios. Examples are provided to illustrate McNemar's test and calculating interrater reliability using Cohen's kappa. The document concludes by emphasizing the importance of selecting the appropriate statistical method based on one's data and checking assumptions.
This document discusses logistic regression, including:
- Logistic regression can be used when the dependent variable is binary and predicts the probability of an event occurring.
- The logistic regression equation calculates the log odds of an event occurring based on independent variables.
- Logistic regression is commonly used in medical research when variables are a mix of categorical and continuous.
This document discusses using SPSS to conduct a chi-square test of independence. It provides an example of testing whether there is an association between area of residence (urban vs. rural) and BMI categories (normal weight vs. overweight/obese). The chi-square test involves stating hypotheses, calculating expected and observed frequencies, computing the test statistic in SPSS, and making a decision. No significant relationship was found between gender and BMI categories in another example exercise.
Spss data analysis for univariate, bivariate and multivariate statistics by d...Dr. Sola Maitanmi
?
This chapter provides an overview of statistical principles and modeling. The goals of statistical modeling are to describe sample data and make inferences about the underlying population. Inferential statistics are used to estimate population parameters based on sample statistics. Statistical tests indicate if observed effects in a sample could plausibly occur by chance or suggest an effect in the population. The appropriate statistical model depends on the type of data, such as using t-tests and ANOVA for mean differences or correlation/regression for relationships between continuous variables. Overall, statistical analysis involves sampling data, applying a model, and evaluating model fit and inferences that can be made about the population.
Chap XI : Outils de Simulation des modes opératoires (Plans d’expériences)Mohammed TAMALI
?
Ce document décrit les outils de simulation des modes opératoires et les plans d'expériences utilisés pour étudier les systèmes en zones arides, notamment dans le cadre de la recherche menée à l'université de Béchar. Il aborde les concepts fondamentaux de la modélisation et de la statistique, ainsi que l'importance des plans d'expériences pour optimiser les essais expérimentaux dans divers domaines industriels. La méthode des plans d'expériences, développée par Ronald Fisher, est mise en avant comme un moyen d'améliorer la qualité et de réduire les co?ts dans la recherche et l'industrie.
The document discusses multiple statistical comparisons and techniques for controlling error rates when performing multiple hypothesis tests on data. It introduces the concepts of family-wise error rate (FWER) and false discovery rate (FDR), and methods like the Sidak correction, Bonferroni correction, and Benjamini-Hochberg procedure for controlling FWER and FDR. It also discusses how p-value distributions can be used to estimate FDR and calculate q-values. Interactive demonstrations are provided to help illustrate key concepts like Type I and Type II errors.
Powerpoint Presentation: research design using quantitative methoddianakamaruddin
?
This document outlines the key stages and considerations in experimental research design using quantitative methods, including developing research questions and hypotheses, identifying variables, sampling strategies, instrument design, statistical analysis, and reporting findings. The main stages discussed are identifying issues, reviewing literature, developing testable questions/hypotheses, identifying independent and dependent variables, research implementation, analyzing results statistically, and preparing a formal report. Experimental designs aim to test hypotheses by manipulating independent variables and measuring effects on dependents, while quasi-experimental designs have less control. Research instruments require validity to accurately measure concepts and reliability to consistently do so.
Logistic regression is used to predict categorical outcomes. The presented document discusses logistic regression, including its objectives, assumptions, key terms, and an example application to predicting basketball match outcomes. Logistic regression uses maximum likelihood estimation to model the relationship between a binary dependent variable and independent variables. The document provides an illustrated example of conducting logistic regression in SPSS to predict match results based on variables like passes, rebounds, free throws, and blocks.
This dissertation defense investigates the concept of entrepreneurial orientation (EO) through a phenomenological lens, focusing on the lived experiences of founder-owners of private companies. It seeks to clarify the sources, dimensions, and manifestations of EO, suggesting it is both an aspirational and dispositional phenomenon that impacts long-term business success. The study emphasizes the need for qualitative research in IO psychology to enhance understanding of EO and its practical applications in the entrepreneurial context.
The document discusses the odds ratio (OR) as a statistical measure used in clinical research to compare the odds of an event occurring in exposed versus unexposed groups. It explains how to calculate the OR, interpret its value, and utilize it in case-control studies, highlighting its importance in determining risk factors. The article also mentions the use of online calculators for OR computation and addresses the significance testing of OR values.
Chapter 6 part2-Introduction to Inference-Tests of Significance, Stating Hyp...nszakir
?
The document discusses the concepts of statistical inference, specifically confidence intervals and tests of significance, detailing their purposes and the procedures involved. It explains the importance of stating hypotheses, calculating test statistics, and interpreting p-values with examples, such as the Cobra Cheese Company assessing milk quality and quality control in a food company. The text outlines the steps for conducting significance tests and the conditions for determining statistical significance based on p-values and significance levels.
This document discusses recent developments in causal inference methods. It contains summaries of talks on several causal inference topics:
1. Miguel Hernan discusses the g-formula approach and inverse probability weighting for estimating causal effects under confounding.
2. Judith Lok discusses marginal structural models and g-estimation of structural nested models for longitudinal data, which allow controlling for time-varying confounding.
3. James Robins discusses single world intervention graphs for representing counterfactuals and the g-formula for estimating effects of dynamic treatment regimes.
4. Tyler VanderWeele discusses approaches for causal mediation analysis, including the difference method and natural direct and indirect effects.
This thesis defense evaluates the potential of Rapid Impact Compaction (RIC) for transportation infrastructure projects, highlighting obstacles to its adoption such as lack of established design procedures and long-term performance data. The research objectives include expanding the knowledge base and assessing applicability of RIC in civil engineering, supported by detailed case histories. Recommendations for overcoming barriers to implementation and improving QC/QA procedures are also presented.
Logistic Regression in Case-Control StudySatish Gupta
?
This document provides an introduction to using logistic regression in R to analyze case-control studies. It explains how to download and install R, perform basic operations and calculations, handle data, load libraries, and conduct both conditional and unconditional logistic regression. Conditional logistic regression is recommended for matched case-control studies as it provides unbiased results. The document demonstrates how to perform logistic regression on a lung cancer dataset to analyze the association between disease status and genetic and environmental factors.
The document discusses generalized linear models (GLMs) and provides examples of logistic regression and Poisson regression. Some key points covered include:
- GLMs allow for non-normal distributions of the response variable and non-constant variance, which makes them useful for binary, count, and other types of data.
- The document outlines the framework for GLMs, including the link function that transforms the mean to the scale of the linear predictor and the inverse link that transforms it back.
- Logistic regression is presented as a GLM example for binary data with a logit link function. Poisson regression is given for count data with a log link.
- Examples are provided to demonstrate how to fit and interpret a logistic
This document provides background information on an expert in computational data and offline real world events. It includes the expert's personal information, education history, work experience, research interests, certifications, and an outline of the topics to be covered. The expert's name is Chun-Ming Lai and they are an Assistant Professor in the Department of Information Engineering at Tunghai University.
When Online Computational Data Meets Offline Real World EventsTunghai University
?
The document presents a comprehensive analysis of crisis informatics during the COVID-19 pandemic in Taiwan, including user behaviors related to the use of a face masks map (FMM) and its correlation with public health announcements. Key findings highlight the predictive power of social media sentiments and reactions in forecasting COVID-19 case numbers. Additionally, the research explores state-sponsored propaganda techniques on social media, focusing particularly on a dataset of posts from the People's Republic of China.
This document discusses information infiltration on social media through various means such as advertising, recommendation engines, public and private pages and groups, and messages. It emphasizes the need for transparency and restraint in communication behavior to address concerns around amplification, privacy, policy, and law. It also discusses defense strategies against disinformation attacks that manipulate social algorithms to influence collective online behavior and recommends approaches like detecting attack behavior, analyzing account credibility, and fact checking.
The document discusses the correlation between Twitter users' locations and their opinions on COVID-19, presenting methodologies for data acquisition from Twitter, data pre-processing, and sentiment analysis. It highlights the top five countries (US, India, UK, China, Australia) that tweeted about COVID-19 from February to May, along with sentiment polarity and subjectivity over time. It also briefly contrasts data collection from Twitter and Facebook and mentions tools for sentiment analysis.
The document discusses social media security challenges related to cognition, cross-platform issues, and push algorithms. It covers topics like abuse targeting internal or external victims, security issues on social media, and the life cycle and influence of social media posts. Detection of multiple accounts and geolocation identification on social media are also summarized.
The document discusses security challenges in online social media. It begins by introducing the speaker, Chun-Ming Tim Lai, and his background and research interests. It then provides an overview of social media and how it has significantly impacted mass communication compared to traditional media. The document outlines some key security threats in social media like phishing, malware, spam, fake news, and crowdturfing. It proposes using lifecycle analysis of posts, detecting multiple accounts, identifying geolocations, and analyzing personal words to help address these security issues.
The document discusses security challenges with online social media. It first outlines the author's background and research interests. It then provides an overview of key aspects of social media compared to traditional media, such as greater data size, user participation, and real-time interaction. The document outlines some major security threats on social media like phishing, malware, spam, fake news, and crowdturfing. It proposes examining suitable targets, lifecycle analysis, detecting multiple accounts, identifying geolocations, and analyzing personal words to address these threats. The outline suggests predicting suitable targets using temporal features and analyzing influence over time.
The document discusses the establishment of the Tunghai Industry Smart-Transformation Center (TISC) by Tunghai University in collaboration with BlueTalk Asia and Amazon AWS to help Taiwanese industries undergo innovation transformation and industrial upgrading in response to disruptive innovation brought by smart technology. The main responsibilities of the center include assisting industries in digital transformation and innovative upgrading, advising industries on building smart innovation and digital transformation intelligent systems, and facilitating industry-academia collaboration and knowledge sharing.
16. 數據描述
? icu:
? 此模組中包含BIDMC MetaVision 數據庫之資料,MetaVision資料庫中進行了反規範化來建立星形的
樣式,其中icustays 與 d_items 連接到一組尾段名稱均帶有events 的資料表,其中包含:
? Intravenous and fluid inputs (inputevents)
? Patients outputs (outputevents)
? Procedures (procedureevents)
? Information documented as a date or time (datetimeevents)
? Other charted information (chartevents)
18. RETROSPECTIVE STUDY IN
ONE SLIDE
1. Define the research hypothesis
2. Create the cohort of Interest
3. Extract covariates
4. Analyze the data (AI predict)
5. Publish
19. EXAMPLE
The Association Between Indwelling Arterial
Catheters and Mortality in
Hemodynamically Stable Patients With
Respiratory Failure: A Propensity Score
Analysis
In the ICU for 24 HOURS
SELECT stay_id, intime, outtime
From `mimic_icu.icustays`
Where DATETIME_DIFF(outtime, intime,
HOUR) >= 24