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Statistical methods

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https://www.readbyqxmd.com/read/28821012/multidomain-analyses-of-a-longitudinal-human-microbiome-intestinal-cleanout-perturbation-experiment
#1
Julia Fukuyama, Laurie Rumker, Kris Sankaran, Pratheepa Jeganathan, Les Dethlefsen, David A Relman, Susan P Holmes
Our work focuses on the stability, resilience, and response to perturbation of the bacterial communities in the human gut. Informative flash flood-like disturbances that eliminate most gastrointestinal biomass can be induced using a clinically-relevant iso-osmotic agent. We designed and executed such a disturbance in human volunteers using a dense longitudinal sampling scheme extending before and after induced diarrhea. This experiment has enabled a careful multidomain analysis of a controlled perturbation of the human gut microbiota with a new level of resolution...
August 18, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28820905/estimating-the-evidential-value-of-significant-results-in-psychological-science
#2
Balazs Aczel, Bence Palfi, Barnabas Szaszi
Quantifying evidence is an inherent aim of empirical science, yet the customary statistical methods in psychology do not communicate the degree to which the collected data serve as evidence for the tested hypothesis. In order to estimate the distribution of the strength of evidence that individual significant results offer in psychology, we calculated Bayes factors (BF) for 287,424 findings of 35,515 articles published in 293 psychological journals between 1985 and 2016. Overall, 55% of all analyzed results were found to provide BF > 10 (often labeled as strong evidence) for the alternative hypothesis, while more than half of the remaining results do not pass the level of BF = 3 (labeled as anecdotal evidence)...
2017: PloS One
https://www.readbyqxmd.com/read/28820902/from-hospitalization-records-to-surveillance-the-use-of-local-patient-profiles-to-characterize-cholera-in-vellore-india
#3
Melissa S Cruz, Tania M AlarconFalconi, Meghan A Hartwick, Aishwarya Venkat, Hanna Y Ehrlich, Shalini Anandan, Honorine D Ward, Balaji Veeraraghavan, Elena N Naumova
Despite availability of high quality medical records, health care systems often do not have the resources or tools to utilize these data efficiently. Yet, hospital-based, laboratory-confirmed records may pave the way for building reliable surveillance systems capable of monitoring temporal trends of emerging infections. In this communication, we present a new tool to compress and visualize medical records with a local population profile (LPP) approach, which transforms information into statistically comparable patterns...
2017: PloS One
https://www.readbyqxmd.com/read/28820759/thromboprophylaxis-in-spinal-surgery
#4
William P Mosenthal, David C Landy, Haroutioun H Boyajian, Olumuyiwa A Idowu, Lewis L Shi, Edwin Ramos, Michael J Lee
STUDY DESIGN: Systematic review and meta-analysis OBJECTIVE.: Determine the incidence of deep vein thrombosis (DVT) and pulmonary embolism (PE) in spinal surgery patients receiving no thromboprophylaxis, mechanoprophylaxis, and chemoprophylaxis. SUMMARY OF BACKGROUND DATA: The incidence of thromboembolic complications after spinal surgery is not well established. While a variety of effective mechanical and chemical thromboprophylaxis interventions exist, their role in spinal surgery remains unclear...
August 17, 2017: Spine
https://www.readbyqxmd.com/read/28820757/flipping-the-nursing-classroom-without-flipping-out-the-students
#5
Victoria Anne Greenwood, Caroline Mosca
Flipping the class has been touted as a method of increasing student participation and improving learning outcomes. In this study, nursing students were introduced to the flipped classroom. They were instructed to listen to narrated PowerPoint presentations before class and be ready to participate in case studies that would enhance their understanding of important concepts. When comparing student test scores before and after flipping the classroom, we found a statistically significant increase of 8.04 points after the change in instruction...
August 17, 2017: Nursing Education Perspectives
https://www.readbyqxmd.com/read/28820733/pubertal-assessment-targeted-educational-intervention-for-pediatric-trainees
#6
Aditi Khokhar, Sairaman Nagarajan, Yagnaram Ravichandran, Sheila Perez-Colon
Background Timely and periodic pubertal assessment in children is vital to identify puberty related disorders. Pediatricians need to have working knowledge of puberty time and tempo. Pediatric residency is an important platform to acquire physical examination skills including pubertal assessment. Objective An educational intervention for teaching pubertal assessment was piloted on pediatric residents at our institution. Methods The intervention comprised of interactive lecture series, ID badge size Tanner stage cards and Tanner posters placed in residents' continuity clinics...
August 18, 2017: International Journal of Adolescent Medicine and Health
https://www.readbyqxmd.com/read/28820411/-importance-of-shear-wave-elastography-of-livers-in-practically-healthy-pregnant-women
#7
E Sariyeva, S Salahova, N Bayramov
Pulse-wave elastography (SWE) that is one of the mostly used methods in the recent years holds important place in assessment of liver fibrosis. However there is no exact information on the results of liver elastography in healthy pregnant women in the world literature. The aim of the study was to investigate theSWE parameters of liver elastography in practically healthy pregnant women. The subject of the research was 50 practically healthy pregnant women within 18-45 years old (mean age 27.7±0.7). The pregnant women with genital and extragenital diseases were not included to the research...
July 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28820364/patterns-of-c-2-fracture-in-the-elderly-comparison-of-etiology-treatment-and-mortality-among-specific-fracture-types
#8
Ingrid Radovanovic, Jennifer C Urquhart, Parham Rasoulinejad, Kevin R Gurr, Fawaz Siddiqi, Christopher S Bailey
OBJECTIVE Previous studies have focused on Type II odontoid fractures and have failed to report on the effect of other C-2 fracture types on treatment and outcome. The purpose of this study was to compare patient characteristics, cause of injury, predisposing factors to fracture, treatments, and mortality rates among C-2 fracture types in a cohort of elderly patients 70 years of age and older. METHODS A retrospective cohort study design was used. Patients who sustained a C-2 fracture between 2002 and 2011 and who were admitted to the authors' Level 1 trauma center were identified using the Discharge Abstract Database and the International Statistical Classification of Diseases and Related Health Problems (ICD-10) code S12...
August 18, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28820359/clinical-outcomes-of-direct-oral-anticoagulants-after-lower-extremity-arterial-procedures
#9
Afsha Aurshina, Pavel Kibrik, Justin Eisenberg, Ahmad Alsheekh, Anil Hingorani, Natalie Marks, Enrico Ascher
Objectives The use of postoperative anticoagulation is not uncommon for patients undergoing lower extremity arterial procedures as adjunctive therapy. Longer postoperative length of stay is necessary to achieve adequate therapeutic international normalized ratio with traditional protocols that call for the use of unfractionated heparin and warfarin therapy. We hypothesized the direct oral anticoagulants are an attractive alternative to provide adequate anticoagulation in patients who undergo lower extremity arterial procedures...
January 1, 2017: Vascular
https://www.readbyqxmd.com/read/28820308/resection-of-pituitary-macroadenomas-via-the-pseudocapsule-along-the-posterior-tumor-margin-a-cohort-study-and-technical-note
#10
Davis G Taylor, John A Jane, Edward H Oldfield
OBJECTIVE Extracapsular resection of pituitary microadenomas improves remission rates, but the application of pseudocapsular techniques for macroadenomas has not been well described. In larger tumors, the extremely thin, compressed normal gland or its complete absence along the tumor's anterior surface limits the application of the traditional pseudocapsular technique that can be used for microadenomas. However, in the authors' experience, the interface between the pseudocapsule at the posterior margin of the adenoma and the compressed normal gland behind it is universally present, providing a surgical dissection plane...
August 18, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28820228/use-of-geographical-information-system-data-for-emergency-management-points-of-distribution-analysis-with-pod-locator-2-0
#11
Christopher A Chung
In 2010, the article Location and Analysis of Emergency Management Point of Distributions (PODs) for Hurricane Ike was published in the Journal of Emergency Management. Using a program titled point of distribution locator (POD Locator 1.0), the article reported a 46 percent improvement in positioning PODs over the locations selected by emergency managers during Hurricane Ike in 2008. While the program could produce more effective POD locations for a given situation, a major weakness of the program was the difficulty with which population and location data were manually entered into the program for subsequent analysis...
March 2017: Journal of Emergency Management: JEM
https://www.readbyqxmd.com/read/28820200/statistical-thermodynamics-unveils-the-dissolution-mechanism-of-cellobiose
#12
Thomas W J Nicol, Noriyuki Isobe, James H Clark, Seishi Shimizu
In the study of the cellulose dissolution mechanism opinion is still divided. Here, the solution interaction components of the most prominent hypotheses for the driving force of cellulose dissolution were evaluated quantitatively. Combining a rigorous statistical thermodynamic theory and cellobiose solubility data in the presence of chloride salts, whose cations progress in the Hofmeister series (KCl, NaCl, LiCl and ZnCl2), we have shown that cellobiose solubilization is driven by the preferential accumulation of salts around the solutes which is stronger than cellobiose hydration...
August 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28819998/reliability-and-validity-of-the-script-concordance-test-for-postgraduate-students-of-general-practice
#13
Julie Subra, Bruno Chicoulaa, André Stillmunkès, Pierre Mesthé, Stéphane Oustric, Marie-Eve Rougé Bugat
BACKGROUND: The script concordance test (SCT) is a validated method of examining students' clinical reasoning. Medical students' professional skills are assessed during their postgraduate years as they study for a specialist qualification in general practice. However, no specific provision is made for assessing their clinical reasoning during their postgraduate study. OBJECTIVE: The aim was to demonstrate the reliability and validity of the SCT in general practice and to determine if this tool could be used to assess medical students' progress in acquiring clinical reasoning...
December 2017: European Journal of General Practice
https://www.readbyqxmd.com/read/28819983/an-evaluation-of-the-effectiveness-of-a-risk-based-monitoring-approach-implemented-with-clinical-trials-involving-implantable-cardiac-medical-devices
#14
Christopher A Diani, Angie Rock, Phil Moll
Background Risk-based monitoring is a concept endorsed by the Food and Drug Administration to improve clinical trial data quality by focusing monitoring efforts on critical data elements and higher risk investigator sites. BIOTRONIK approached this by implementing a comprehensive strategy that assesses risk and data quality through a combination of operational controls and data surveillance. This publication demonstrates the effectiveness of a data-driven risk assessment methodology when used in conjunction with a tailored monitoring plan...
August 1, 2017: Clinical Trials: Journal of the Society for Clinical Trials
https://www.readbyqxmd.com/read/28819944/contribution-of-inherited-thrombophilia-to-recurrent-miscarriage-in-the-polish-population
#15
Hubert Wolski, Magdalena Barlik, Krzysztof Drews, Andrzej Klejewski, Grażyna Kurzawińska, Marcin Ożarowski, Zdzisław Łowicki, Agnieszka Seremak-Mrozikiewicz
INTRODUCTION: The aim of the study was to evaluate the contribution of genetic variants determining inherited thrombophilia to recurrent miscarriage (RM) in the Polish population. The following polymorphisms were analyzed: 1691G>A, 1328T>C of coagulation factor V, 20210G>A of coagulation factor II, R353Q (11496G>A) of coagulation factor VII, 667C>T, 1298A>C, 1793G>A of MTHFR. MATERIAL AND METHODS: A total of 359 women with ≥ 2 subsequent recurrent miscarriages (303 < 13 weeks of gestation (w...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28819942/study-of-the-relationship-between-ages-and-oxidative-stress-damage-to-trophoblast-cell-mitochondria
#16
Lingling Jiang, Jianying Yan, Lixiang Wu
OBJECTIVES: To study the influence of AGEs on placental trophoblast mitochondria oxidative stress, and to explore the possible pathogenesis which may participate in pre-eclampsia. MATERIAL AND METHODS: Human trophoblast cells from early pregnancy were cultured by an enzyme-digestion method. When trophoblast cells reached approximately 70-80% after passages, they were incubated with pre-eclampsia serum for 24 hours. A fluorescent dye assay was applied to measure the mitochondrial membrane potential; ELISA was used to measure the activity of the mitochondrial permeability transition pore...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28819626/robust-significance-analysis-of-microarrays-by-minimum-%C3%AE-divergence-method
#17
Md Shahjaman, Nishith Kumar, Md Manir Hossain Mollah, Md Shakil Ahmed, Anjuman Ara Begum, S M Shahinul Islam, Md Nurul Haque Mollah
Identification of differentially expressed (DE) genes with two or more conditions is an important task for discovery of few biomarker genes. Significance Analysis of Microarrays (SAM) is a popular statistical approach for identification of DE genes for both small- and large-sample cases. However, it is sensitive to outlying gene expressions and produces low power in presence of outliers. Therefore, in this paper, an attempt is made to robustify the SAM approach using the minimum β-divergence estimators instead of the maximum likelihood estimators of the parameters...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28819509/prevalence-and-intensity-of-soil-transmitted-helminths-among-school-children-of-mendera-elementary-school-jimma-southwest-ethiopia
#18
Ephrem Tefera, Tariku Belay, Seleshi Kebede Mekonnen, Ahmed Zeynudin, Tefera Belachew
INTRODUCTION: Soil transmitted helminths are wide spread in developing countries and in Ethiopia the prevalence of STHs varies in different parts of the country. The aim of this study was to determine the prevalence and intensity of soil transmitted helminths among school children of Mendera Elementary School Jimma town, Southwestern Ethiopia. METHODS: A cross-sectional study was conducted between March 29 and April 9, 2010 to determine the prevalence and intensity of soil transmitted helminths among elementary school children...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28819474/expanding-health-insurance-scheme-in-the-informal-sector-in-nigeria-awareness-as-a-potential-demand-side-tool
#19
David Ayobami Adewole, Saidat Abisola Akanbi, Kayode Omoniyi Osungbade, Segun Bello
INTRODUCTION: The implementation and expansion of a health insurance scheme in the informal sector, particularly in developing countries, is a challenge. With the aid of an innovative Information-Education and Communication model, titled 'Understanding the concept of health insurance: An innovative social marketing tool', an assessment of the awareness and perception of the scheme among market women was carried out. METHODS: This is a cross-sectional descriptive survey, carried out among market women in Ibadan, Nigeria...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28819433/alcohol-consumption-and-lung-cancer-according-to-ile349val-polymorphism-in-adh3-gene-beyond-the-tobacco-smoking-effect
#20
Ana Fernández-Somoano, Sara M Álvarez-Avellón, Ana Souto-García, Jesús Vioque, Eva M Navarrete-Muñoz, Adonina Tardón
Objectives: Smoking is the leading cause of lung cancer. However, several studies have suggested other factors such as alcohol consumption could also play a role through polymorphisms associated with alcohol metabolism. We investigated the association between alcohol consumption and lung cancer according to the Ile349Val polymorphism in the alcohol dehydrogenase 3 ADH3 gene. Methods: We carried out a hospital-based case-control study, a total of 402 incident cases of lung cancer and 383 controls were genotyped for the Ile349Val polymorphism by polymerase chain reaction combined with restriction fragment length polymorphism...
2017: Journal of Cancer
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