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https://www.readbyqxmd.com/read/27904175/biostatistics-series-module-6-correlation-and-linear-regression
#1
Avijit Hazra, Nithya Gogtay
Correlation and linear regression are the most commonly used techniques for quantifying the association between two numeric variables. Correlation quantifies the strength of the linear relationship between paired variables, expressing this as a correlation coefficient. If both variables x and y are normally distributed, we calculate Pearson's correlation coefficient (r). If normality assumption is not met for one or both variables in a correlation analysis, a rank correlation coefficient, such as Spearman's rho (ρ) may be calculated...
November 2016: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/27902575/veterans-voice-through-the-lens-of-their-medical-records-what-it-reveals-about-congestive-heart-failure-readmissions
#2
Carl W Stevenson, Kattie Payne
PURPOSE OF STUDY: The medical record is a sea of information that can reveal what patients are trying to tell us about their health condition. It can reveal hints and trends as to why veterans with congestive heart failure (CHF) are being readmitted within 30 days after hospital discharge. These hints and trends lead caregivers to key contributing variables to veterans' readmission. Furthermore, these variables can be used to predict patient outcomes such as readmission and even prognosis...
January 2017: Professional Case Management
https://www.readbyqxmd.com/read/27881428/genome-transcriptome-and-proteome-the-rise-of-omics-data-and-their-integration-in-biomedical-sciences
#3
Claudia Manzoni, Demis A Kia, Jana Vandrovcova, John Hardy, Nicholas W Wood, Patrick A Lewis, Raffaele Ferrari
Advances in the technologies and informatics used to generate and process large biological data sets (omics data) are promoting a critical shift in the study of biomedical sciences. While genomics, transcriptomics and proteinomics, coupled with bioinformatics and biostatistics, are gaining momentum, they are still, for the most part, assessed individually with distinct approaches generating monothematic rather than integrated knowledge. As other areas of biomedical sciences, including metabolomics, epigenomics and pharmacogenomics, are moving towards the omics scale, we are witnessing the rise of inter-disciplinary data integration strategies to support a better understanding of biological systems and eventually the development of successful precision medicine...
November 22, 2016: Briefings in Bioinformatics
https://www.readbyqxmd.com/read/27876072/high-specificity-bioinformatics-framework-for-epigenomic-profiling-of-discordant-twins-reveals-specific-and-shared-markers-for-acpa-and-acpa-positive-rheumatoid-arthritis
#4
David Gomez-Cabrero, Malin Almgren, Louise K Sjöholm, Aase H Hensvold, Mikael V Ringh, Rakel Tryggvadottir, Juha Kere, Annika Scheynius, Nathalie Acevedo, Lovisa Reinius, Margaret A Taub, Carolina Montano, Martin J Aryee, Jason I Feinberg, Andrew P Feinberg, Jesper Tegnér, Lars Klareskog, Anca I Catrina, Tomas J Ekström
BACKGROUND: Twin studies are powerful models to elucidate epigenetic modifications resulting from gene-environment interactions. Yet, commonly a limited number of clinical twin samples are available, leading to an underpowered situation afflicted with false positives and hampered by low sensitivity. We investigated genome-wide DNA methylation data from two small sets of monozygotic twins representing different phases during the progression of rheumatoid arthritis (RA) to find novel genes for further research...
November 22, 2016: Genome Medicine
https://www.readbyqxmd.com/read/27876014/prenatal-diagnosis-in-sweden-2011-to-2013-a-register-based-study
#5
Kerstin Petersson, Marie Lindkvist, Margareta Persson, Peter Conner, Annika Åhman, Ingrid Mogren
BACKGROUND: Prenatal diagnosis involves methods used in early pregnancy as either screening tests or diagnostic methods. The aims of the study were to i) investigate guidelines on prenatal diagnosis in the counties of Sweden, ii) investigate uptake of prenatal diagnosis, and iii) background characteristics and pregnancy outcomes in relation to different prenatal diagnostic methods. METHODS: A retrospective cross-sectional study using data from the Swedish Pregnancy Register 2011 to 2013 (284,789 pregnancies) was performed...
November 22, 2016: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/27829380/design-and-development-of-the-australian-and-new-zealand-anz-myeloma-and-related-diseases-registry
#6
Krystal Bergin, Elizabeth Moore, Zoe McQuilten, Erica Wood, Bradley Augustson, Hilary Blacklock, Joy Ho, Noemi Horvath, Tracy King, John McNeil, Peter Mollee, Hang Quach, Christopher M Reid, Brian Rosengarten, Patricia Walker, Andrew Spencer
BACKGROUND: Plasma cell dyscrasias (PCD) are a spectrum of disorders resulting from the clonal expansion of plasma cells, ranging from the pre-malignant condition monoclonal gammopathy of undetermined significance (MGUS) to multiple myeloma (MM). MM generates a significant burden of disease on the community and it is predicted that it will increase in both incidence and prevalence owing to an ageing population and longer survival secondary to new therapeutic options. Robust and comprehensive clinical data are currently lacking but are required to define current diagnostic, investigational and management patterns in Australia and New Zealand (ANZ) for comparison to both local and international guidelines for standards of care...
November 9, 2016: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/27828888/approach-to-a-standardized-injury-prevention-coordinator-training-curriculum
#7
Pina Violano, Ian Weston, Glen Tinkoff
The effectiveness of trauma center-based injury prevention programs is constrained by a number of variables. These include the wide range of injury types, the variety of possible interventions, institutional support and funding, and the knowledge and experience of the persons responsible for these programs. As the field of injury prevention has increased in complexity, so must the role and professional development of these injury prevention professionals responsible for these programs. Trauma center-based injury prevention coordinators are a diverse group with variable education and professional background especially related to public health, advocacy, epidemiology, biostatistics, and research...
November 2016: Journal of Trauma Nursing: the Official Journal of the Society of Trauma Nurses
https://www.readbyqxmd.com/read/27803488/a-survey-of-introductory-statistics-courses-at-university-faculties-of-pharmaceutical-sciences-in-japan
#8
Mina Matsumura, Takuto Nakayama, Takashi Sozu
 A survey of introductory statistics courses at Japanese medical schools was published as a report in 2014. To obtain a complete understanding of the way in which statistics is taught at the university level in Japan, it is important to extend this survey to related fields, including pharmacy, dentistry, and nursing. The current study investigates the introductory statistics courses offered by faculties of pharmaceutical sciences (six-year programs) at Japanese universities, comparing the features of these courses with those studied in the survey of medical schools...
2016: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/27797082/using-fluorescent-reporters-in-conjunction-with-cytometry-and-statistics-to-assess-nuclear-accumulation-of-ribosomal-proteins
#9
Dong-Hwan Kim, Andrew C Box, Hua Li, Jennifer L Gerton
Fluorescently labeled ribosomal proteins can be used to detect and monitor the intracellular localization of these proteins. Both Rps2, a subunit of the 40S ribosome, and Rpl25, a subunit of the 60S ribosome, have been fused to the coding sequence of GFP at their C-termini and the fusions have been used to monitor their localization within cells using fluorescent microscopy. Normally these proteins are efficiently incorporated into ribosomes and exported into the cytoplasm where they exhibit a low uniform fluorescence...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27793412/challenges-in-the-estimation-of-net-survival-the-censur-working-survival-group
#10
R Giorgi
BACKGROUND: Net survival, the survival probability that would be observed, in a hypothetical world, where the cancer of interest would be the only possible cause of death, is a key indicator in population-based cancer studies. Accounting for mortality due to other causes, it allows cross-country comparisons or trends analysis and provides a useful indicator for public health decision-making. The objective of this study was to show how the creation and formalization of a network comprising established research teams, which already had substantial and complementary experience in both cancer survival analysis and methodological development, make it possible to meet challenges and thus provide more adequate tools, to improve the quality and the comparability of cancer survival data, and to promote methodological transfers in areas of emerging interest...
October 2016: Revue D'épidémiologie et de Santé Publique
https://www.readbyqxmd.com/read/27792893/evaluation-of-the-impact-of-genetic-linkage-in-forensic-identity-and-relationship-testing-for-expanded-dna-marker-sets
#11
Andreas O Tillmar, Chris Phillips
Advances in massively parallel sequencing technology have enabled the combination of a much-expanded number of DNA markers (notably STRs and SNPs in one or combined multiplexes), with the aim of increasing the weight of evidence in forensic casework. However, when data from multiple loci on the same chromosome are used, genetic linkage can affect the final likelihood calculation. In order to study the effect of linkage for different sets of markers we developed the biostatistical tool ILIR, (Impact of Linkage on forensic markers for Identity and Relationship tests)...
October 15, 2016: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/27789317/the-latin-american-clinical-epidemiology-network-latinclen
#12
Carlos Gómez Restrepo, Sergio Muñoz N, Alvaro J Ruiz, Fernando Lanas
The Latin American Clinical Epidemiology Network (LatinCLEN) was born in the nineties as a branch of the International Clinical Epidemiology Network (INCLEN). Clinical Epidemiology Units that made up this network in the region were initially composed of health professionals trained in Australia and North America. From these units, second and third generation training centers started to develop in the region, with the main purpose of introducing clinical research methodology and critical appraisal, as well as health economics and biostatistics...
October 24, 2016: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/27783428/new-curricular-design-in-biostatistics-to-prepare-residents-for-an-evidence-based-practice-and-life-long-learning-education-a-pilot-approach
#13
A Arias, O A Peters, I L Broyles
AIM: To develop, implement and evaluate an innovative curriculum in biostatistics in response to the needs of fostering critical thinking in graduate health care education for evidence-based practice and life-long learning education. METHODOLOGY: The curriculum was designed for first-year residents in a postgraduate endodontic program using a six-step approach to curriculum development to provide sufficient understanding to critically evaluate biomedical publications, to design the best research strategy to address a specific problem and to analyse data by appropriate statistical test selection...
October 26, 2016: International Endodontic Journal
https://www.readbyqxmd.com/read/27777586/structural-stability-transitions-and-interactions-within-soxyzcd-thiosulphate-from-sulfurimonas-denitrificans-an-in-silico-molecular-outlook-for-maintaining-environmental-sulphur-cycle
#14
Sujay Ray, Arundhati Banerjee
Thiosulphate oxidation (an essential mechanism) serves to maintain the global sulphur cycle. Earlier experimental and computational studies dealt with environmental thiosulphate oxidation but none dealt with thiosulphate oxidation from deep ocean belts. Wet-laboratory experimental research shows that epsilon-proteobacteria Sulfurimonas denitrificans possess sox (sulphur-oxidizing) operon and perform thiosulphate oxidation efficiently underneath the oceans. From this specific sox operon, SoxCD complex recycles the thiosulphate-bound SoxY from SoxYZ complex to balance the environmental sulphur cycle...
2016: Journal of Biophysics
https://www.readbyqxmd.com/read/27777443/best-practices-for-biostatistical-consultation-and-collaboration-in-academic-health-centers
#15
Susan M Perkins, Peter Bacchetti, Cynthia S Davey, Christopher J Lindsell, Madhu Mazumdar, Robert A Oster, Peter N Peduzzi, David M Rocke, Kyle D Rudser, Mimi Kim
Given the increasing level and scope of biostatistics expertise needed at academic health centers today, we developed best practices guidelines for biostatistics units to be more effective in providing biostatistical support to their institutions, and in fostering an environment in which unit members can thrive professionally. Our recommendations focus on the key areas of: 1) funding sources and mechanisms; 2) providing and prioritizing access to biostatistical resources; and 3) interacting with investigators...
2016: American Statistician
https://www.readbyqxmd.com/read/27764123/the-importance-of-medical-students-attitudes-regarding-cognitive-competence-for-teaching-applied-statistics-multi-site-study-and-meta-analysis
#16
Natasa M Milic, Srdjan Masic, Jelena Milin-Lazovic, Goran Trajkovic, Zoran Bukumiric, Marko Savic, Nikola V Milic, Andja Cirkovic, Milan Gajic, Mirjana Kostic, Aleksandra Ilic, Dejana Stanisavljevic
BACKGROUND: The scientific community increasingly is recognizing the need to bolster standards of data analysis given the widespread concern that basic mistakes in data analysis are contributing to the irreproducibility of many published research findings. The aim of this study was to investigate students' attitudes towards statistics within a multi-site medical educational context, monitor their changes and impact on student achievement. In addition, we performed a systematic review to better support our future pedagogical decisions in teaching applied statistics to medical students...
2016: PloS One
https://www.readbyqxmd.com/read/27741981/advances-in-understanding-air-pollution-and-cvd
#17
REVIEW
Joel D Kaufman, Elizabeth W Spalt, Cynthia L Curl, Anjum Hajat, Miranda R Jones, Sun-Young Kim, Sverre Vedal, Adam A Szpiro, Amanda Gassett, Lianne Sheppard, Martha L Daviglus, Sara D Adar
The MESA Air (Multi-Ethnic Study of Atherosclerosis and Air Pollution) leveraged the platform of the MESA cohort into a prospective longitudinal study of relationships between air pollution and cardiovascular health. MESA Air researchers developed fine-scale, state-of-the-art air pollution exposure models for the MESA Air communities, creating individual exposure estimates for each participant. These models combine cohort-specific exposure monitoring, existing monitoring systems, and an extensive database of geographic and meteorological information...
September 2016: Global Heart
https://www.readbyqxmd.com/read/27729802/microrna-profiling-of-patient-plasma-for-clinical-trials-using-bioinformatics-and-biostatistical-approaches
#18
Joseph Markowitz, Zachary Abrams, Naduparambil K Jacob, Xiaoli Zhang, John N Hassani, Nicholas Latchana, Lai Wei, Kelly E Regan, Taylor R Brooks, Sarvani R Uppati, Kala M Levine, Tanios Bekaii-Saab, Kari L Kendra, Gregory B Lesinski, J Harrison Howard, Thomas Olencki, Philip R Payne, William E Carson
BACKGROUND: MicroRNAs (miRNAs) are short noncoding RNAs that function to repress translation of mRNA transcripts and contribute to the development of cancer. We hypothesized that miRNA array-based technologies work best for miRNA profiling of patient-derived plasma samples when the techniques and patient populations are precisely defined. METHODS: Plasma samples were obtained from five sources: melanoma clinical trial of interferon and bortezomib (12), purchased normal donor plasma samples (four), gastrointestinal tumor bank (nine), melanoma tumor bank (ten), or aged-matched normal donors (eight) for the tumor bank samples...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27714814/genetic-identification-of-communist-crimes-victims-1944-1956-based-on-the-analysis-of-one-of-many-mass-graves-discovered-on-the-powazki-military-cemetery-in-warsaw-poland
#19
Andrzej Ossowski, Marta Diepenbroek, Tomasz Kupiec, Milena Bykowska-Witowska, Grażyna Zielińska, Teresa Dembińska, Andrzej Ciechanowicz
As the result of the communist terror in Poland, during years 1944-1956 more than 50,000 people died. Their bodies were buried secretly, and most places are still unknown. The research presents the results of identification of people buried in one of many mass graves, which were found at the cemetery Powązki Military in Warsaw, Poland. Exhumation revealed the remains of eight people, among which seven were identified genetically. Well-preserved molars were used for the study. Reference material was collected from the closest living relatives...
November 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/27694664/hta-algorithm-or-process-comment-on-expanded-hta-enhancing-fairness-and-legitimacy
#20
Anthony J Culyer
Daniels, Porteny and Urrutia et al make a good case for the idea that that public decisions ought to be made not only "in the light of" evidence but also "on the basis of" budget impact, financial protection and equity. Health technology assessment (HTA) should, they say, be accordingly expanded to consider matters additional to safety and cost-effectiveness. They also complain that most HTA reports fail to develop ethical arguments and generally do not even mention ethical issues. This comment argues that some of these defects are more apparent than real and are not inherent in HTA - as distinct from being common characteristics found in poorly conducted HTAs...
May 16, 2016: International Journal of Health Policy and Management
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