Addressing the Problem of Feature Selection Using Genetic Algorithms

Posted by Munshi Imran Hossain

Jan 15, 2018 8:12:00 AM

The problem of feature selection

The explosion in the availability of big data has made complex prediction models a conspicuous reality of our times. Whether in banking, financial services and insurance, telecoms, manufacturing or healthcare, predictive models are increasingly used to derive inference from data.

Most of these models use a set of input variables, called features, to predict the output on a variable of interest. For example, the concentration of characteristic biomarkers in the blood can be used to predict the presence, absence or progress of certain diseases.

The available data can provide a large number of features, but generally, it’s preferable to use a small number of really relevant features in a model. This is because a model with more features has a greater complexity which leads to greater demand on computational resources and time to train the model. Therefore it is desirable to restrict the number of features in a predictive model. Choosing the subset of features that will result in a model with optimum performance is the problem of feature selection. This is essentially a problem of plenty.

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Topics: big data, data science, genetic algorithm


Career Perspectives: Interview with Lisa Goldberg, Associate Director of Statistical Programming

Posted by Cytel

Jan 9, 2018 8:13:57 AM

Our Career Perspectives' series is back! 

Cytel has industry-leading experts in statistical programming with years of SAS® Programming expertise, combined with in-depth knowledge of specific clinical subject matter, which allows for competent and on-time completion of tasks. Our extensive service offering includes CDISC migration, mapping to SDTM and statistical programming.

In the first blog of 2018, we talk to Lisa, who is based in Boston, to find out more on her career path, achievements, current role at Cytel and her interests outside of work.

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Topics: Recruitment, Statistical Programming, Statistical Analysis, CDISC, SAS, careers, CRO, clinical research


How Can We Tackle Heterogeneity in Meta-Analysis?

Posted by Anwaya Nirphirake

Jan 3, 2018 11:10:00 AM

Health professionals and policy makers want to make healthcare decisions based on the relevant research evidence. The questions in clinical research are typically studied more than once independently by different researchers. Literature review is used for summarizing the results of these studies and strengthening the evidence. Systematic review is a type of literature review that collects and critically analyzes multiple research studies or papers that answer the same question. If the results of these multiple studies are diverse and conflicting then the clinical decision-making becomes difficult. To overcome this problem meta-analysis is used. Meta-analysis is a statistical procedure for combining the results of studies that are included in systematic review. While meta-analysis is a powerful technique, it may give misleading results due to issues like improper selection of studies, publication bias, and heterogeneity among studies. In this blog, we will focus on the problem of heterogeneity.

 

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Topics: custom software, meta-analysis


Round-Up:The 6 Hottest Blog Topics from 2017

Posted by Cytel

Dec 21, 2017 6:44:00 AM

As we prepare to close the door on 2017, we thought we would take a look back at the  topics which have been most popular on the Cytel blog this year.  It's an interesting insight on what pain points and opportunities feature highly on our global biopharma audience's radar.  Read on to learn which of our 2017 blogs have received the most interest from our audience so far.

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Topics: Oncology, Data Management, Cytel Strategic Consulting, Statistical Analysis, Trial Design Software, pharmacometrics, estimands, NONMEM, data science, R language


Providing Evidence that Pollution Accelerates Skin Aging in Fast Moving Consumer Goods Trial

Posted by Cytel

Dec 19, 2017 6:11:00 AM

 

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Topics: Trial Design, Statistical Analysis, FMCG


Signal Management Using R

Posted by Krishna Asvalayan

Dec 12, 2017 7:33:00 AM


Signal management is one of the most audited pharmacovigilance processes. It also generates one of the highest findings from audits. The ability of Marketing Authorisation Holders (MAHs) to make a robust signal management system that is fully audit/inspection ready sometimes falls short of expectations. Happily, technology can be used to make the process more scientific and rigorous.
Technology in the signal management process can be divided into two categories. The first one is the front end i.e. what platform (.Net/JAVA) is being used to develop the system. The second is the back end i.e. what programs/software (R, Python, SAS) are used to process the data. In this blog, we will focus on the second category and discuss how R specifically can help improve the signal management process.

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Topics: Statistical Analysis, data science, pharmacovigilance, R language, signal detection


Slides: East User Group Meeting and Trial Design Symposium

Posted by Cytel

Dec 4, 2017 11:28:00 AM


In 2011, Cytel organized its first East User Group Meeting (EUGM) in Paris. Since then, we have held an EUGM almost every year, alternating between locations in Europe and North America.  These meetings have been a great success, giving opportunities for customers and industry colleagues to meet each other as well as with key opinion leaders, whilst learning more about our East software and providing critical feedback. 

This year, the EUGM was held in Cambridge MA on the 25th and 26th of October. In this blog we are delighted to share the slides from some of the speakers' presentations. 

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Topics: Cytel Strategic Consulting, Clinical Development Strategy, Adaptive Clinical Trials, Statistical Innovations in Clinical Development, EAST 6.4, adaptive trials


Interview: Clinical Trial Optimization with R

Posted by Cytel

Nov 28, 2017 10:27:00 AM

 

In this blog we turn to some reading matter, and interview Gautier Paux and Alex Dmitrienko about the recent book 'Clinical Trial Optimization with R'.  The book explores a unified and broadly applicable framework for optimizing decision making and strategy selection in clinical development, through a series of examples and case studies. To learn more, read on for Paux and Dmitrienko's insights.

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Topics: Cytel Consulting, Clinical Development Strategy, Software Simulations


Career Perspectives: Interview with Makarand Deshmukh, Senior Clinical Data Analyst

Posted by Cytel

Nov 22, 2017 8:46:00 AM

Cytel offers a full range of clinical data management services and the team of experts is spread across the globe.

In this blog we talk to Makarand, who is based in India, to find out more about his career path, current role at Cytel and his interests outside of work. 

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Topics: Data Management, Clinical Research Services, Statistical Programming, Statistical Analysis, careers, clinical data management, clinical research


Highlights from PhUSE 2017

Posted by Cytel

Nov 17, 2017 5:00:00 AM

PhUSE 2017 took place in Scotland’s capital city Edinburgh, 8th - 11th October, and brought together a range of experts to tackle the most pressing issues facing statistical programmers today.  We found this year's event informative and well attended. In this blog we share some highlights from the sessions and posters the Cytel team attended.  We will share Cytel's own contributions in a separate article.

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Topics: Statistical Programming, FDA, Interim Analyses, biostatistics, CDISC, R programming, clinical trials


Creating Efficiencies in the Vendor Qualification Process: A Proposal

Posted by Cytel

Nov 15, 2017 8:46:00 AM

Each year Halloran Consulting Group hosts‘CORE’ (Clinical Operations Retreat for Executives) as a forum for industry executives to discuss pressing challenges in a collaborative environment. This year, our Senior V.P. of Clinical Research Services, Irving Dark, discussed the topic of vendor qualification and posed the question to the group: are there better alternatives to the traditional qualification audit process? In this blog, we present Irving’s proposal for an innovative approach that could improve efficiency and allow sponsors to invest more time evaluating the operational and cultural aspects that have greater potential to ensure the success of a partnership

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Topics: Clinical Research Services, outsourcing, Clinical Data, CRO


The Cytel Story: In the Co-Founders' Own Words

Posted by Cytel

Nov 9, 2017 11:43:00 AM

 In this blog we are excited to unveil a new project which we have been hard at work on over the last few months. 

2017 marks a very special milestone for Cytel – our 30th anniversary.  Cyrus Mehta and Nitin Patel founded Cytel in 1987 with an initial objective to solve a specific problem in computational statistics.

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Topics: Cytel Consulting, Clinical Development Strategy, biostatistics


Asking the Right Questions of Your Data: Experiences in Model Informed Drug Development

Posted by Cytel

Nov 6, 2017 5:28:43 AM

 At the Chief Medical Officer Summit earlier this year, Cytel's Director of Quantitative Pharmacology and Pharmacometrics Cecilia Fosser, and Senior Director, Business Development, Chuck Gelb presented on how model-informed drug development (MIDD) techniques can improve decision-making and Probability of Success ( PoS) of clinical trial programs.  In this blog, we share some highlights and the informative10-minute video replay of their talk which includes a modeling and simulation case study. 

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Topics: Clinical Development Strategy, pharmacometrics, biostatistics, model-informed-drug-development


Innovative posters unveiled at ACoP8

Posted by Cytel

Nov 2, 2017 9:05:00 AM

 

Last month was the eighth American Conference on Pharmacometrics (ACoP8) in Florida, a key event on the calendar for Cytel’s Quantitative Pharmacology and Pharmacometrics subject matter experts.

Cytel was delighted to contribute to the event this year and present two posters. This was excellent opportunity to share our knowledge and innovative research, alongside networking with likeminded industry professionals.  

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Topics: Clinical Research Services, Phase 1, Clinical Data, pharmacometrics, clinical development, pharmacology, model-informed-drug-development


Webinar Replay: Dual Target Methods for Go/No-Go Decision Making

Posted by Cytel

Oct 31, 2017 10:42:00 AM

As part of Cytel's new Trial Innovations Webinar Series, Pat Mitchell, Statistical Science Director at AstraZeneca presented the October webinar "Formal Go/No-Go decisions are a key component of risk management in early clinical development."

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Topics: Trial Design, Adaptive Clinical Trials, phase 2, go-no-go, clinical development, adaptive designs, Bayesian, custom software


Design Concept for Confirmatory Basket Trial Interview with Bob Beckman: Part 2

Posted by Cytel

Oct 27, 2017 9:53:00 AM

In this blog, we share the second part of our interview with Bob Beckman, about a design concept for a confirmatory basket trial. Beckman is Professor of Oncology and of Biostatistics, Bioinformatics, and Biomathematics at Lombardi Comprehensive Cancer Center and the Innovation Center of Biomedical Informatics, Georgetown University Medical Center. The first part of the interview, which focuses on the context of the design is available to read here.  Otherwise, read on to learn more details about this innovative design which has the potential to drastically increase drug development efficiency. Beckman presented on this topic at Cytel's East User Group Meeting in October.

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Topics: Oncology, FDA, Clinical Data, adaptive designs, basket trials


2017 ASA Biopharmaceutical Section Regulatory-Industry Statistics Workshop

Posted by Cytel

Oct 24, 2017 6:01:00 AM

The ASA Biopharmaceutical Section Regulatory-Industry Statistics Workshop is sponsored by the ASA Biopharmaceutical Section in cooperation with the FDA Statistical Association. Each year 800 statistical practitioners come together to absorb new information on statistical practices in all areas regulated by the FDA.

Cytel was honored to be involved in the workshop program, and our subject matter experts added value to the conference by sharing their academic and regulatory experiences.

Don’t worry if you missed the event!

In this blog, we share the full slide set slide from Cytel contributions at the ASA Biopharmaceutical Section Regulatory Industry Statistics Workshop.

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Topics: Sample Size, Promising Zone, Clinical Research Services, Regulation, FDA, Clinical Data, Adaptive Clinical Trials, adaptive sample size re-estimation, adaptive designs, Bayesian


Webinar Replay: Phase 2 Trial Designs using Program-level Simulations

Posted by Cytel

Oct 18, 2017 11:03:00 AM

 

Cytel's new Trial Innovations Webinar Series provides a platform for the most promising new statistical approaches helping to bridge the gap from methodology to implementation. Ultimately, our goal is to enable our audience to improve their chances of success in clinical development.

The series got underway in August with a webinar on ‘Phase 2 Trial Designs using Program-level Simulations, and Possible Adaptive Approaches’.

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Topics: Trial Design, Program and Portfolio Optimization, Adaptive Clinical Trials, phase 2, Simulations


Highlights from the 2017 SCDM Program

Posted by Cytel

Oct 4, 2017 7:34:36 AM

The Society for Clinical Data Management (SCDM) conference landed in Orlando last week providing insights and key trends for clinical data managers from around the world.  In this blog we share an infographic of some of the agenda highlights along with a more detailed overview of our Alla Muchnik's contribution to the session Study Medication Compliance: Data Collection Challenges. 

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Topics: Data Management, Clinical Research Services, Interim Analyses, Clinical Data


Career Perspectives: Interview with Namrata Deshpande, Senior Team Lead

Posted by Cytel

Sep 29, 2017 3:01:00 PM

Namrata Deshpande, Senior Team Lead will be participating in a round table discussion at the Women in Statistics event in California, October 19-21.

This is the first blog in a new 'Career Perspectives' series and we talk to Namrata to find out more on her career path, achievements, current role at Cytel and her interests outside of work. 

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Topics: East, Clinical Research Services, Statistical Programming, Statistical Analysis, Clinical Development Strategy, Statistical Innovations in Clinical Development, biostatistics, R programming, careers


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