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Epidemiologic Methods

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https://www.readbyqxmd.com/read/29346414/reliability-of-plasma-polar-metabolite-concentrations-in-a-large-scale-cohort-study-using-capillary-electrophoresis-mass-spectrometry
#1
Sei Harada, Akiyoshi Hirayama, Queenie Chan, Ayako Kurihara, Kota Fukai, Miho Iida, Suzuka Kato, Daisuke Sugiyama, Kazuyo Kuwabara, Ayano Takeuchi, Miki Akiyama, Tomonori Okamura, Timothy M D Ebbels, Paul Elliott, Masaru Tomita, Asako Sato, Chizuru Suzuki, Masahiro Sugimoto, Tomoyoshi Soga, Toru Takebayashi
BACKGROUND: Cohort studies with metabolomics data are becoming more widespread, however, large-scale studies involving 10,000s of participants are still limited, especially in Asian populations. Therefore, we started the Tsuruoka Metabolomics Cohort Study enrolling 11,002 community-dwelling adults in Japan, and using capillary electrophoresis-mass spectrometry (CE-MS) and liquid chromatography-mass spectrometry. The CE-MS method is highly amenable to absolute quantification of polar metabolites, however, its reliability for large-scale measurement is unclear...
2018: PloS One
https://www.readbyqxmd.com/read/29346387/inferring-the-risk-factors-behind-the-geographical-spread-and-transmission-of-zika-in-the-americas
#2
Lauren M Gardner, András Bóta, Karthik Gangavarapu, Moritz U G Kraemer, Nathan D Grubaugh
BACKGROUND: An unprecedented Zika virus epidemic occurred in the Americas during 2015-2016. The size of the epidemic in conjunction with newly recognized health risks associated with the virus attracted significant attention across the research community. Our study complements several recent studies which have mapped epidemiological elements of Zika, by introducing a newly proposed methodology to simultaneously estimate the contribution of various risk factors for geographic spread resulting in local transmission and to compute the risk of spread (or re-introductions) between each pair of regions...
January 18, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29346374/epidemiological-investigation-into-the-prevalence-of-abnormal-inter-arm-blood-pressure-differences-among-different-ethnicities-in-xinjiang-china
#3
Ling Sun, Ting Zou, Bao-Zhu Wang, Fen Liu, Qing-Hua Yuan, Yi-Tong Ma, Xiang Ma
OBJECTIVES: The prevalence of and risk factors for IAD among different ethnicity groups was unknown. Our aim was to investigate the prevalence of and risk factors for IAD among Han, Uygur and Kazakh ethnicities in Xinjiang. China. METHODS: In total, 14,618 adult participants (7,799 males and 6,819 females) were recruited from the Cardiovascular Risk Survey. A 4-stage stratified cluster random sampling method was used. The participants' personal information and medical history were assessed by questionnaire...
2018: PloS One
https://www.readbyqxmd.com/read/29344276/the-clinicopathological-features-and-survival-outcomes-of-different-histological-subtypes-in-triple-negative-breast-cancer
#4
Hong-Ye Liao, Wen-Wen Zhang, Jia-Yuan Sun, Feng-Yan Li, Zhen-Yu He, San-Gang Wu
Purpose: To determine the clinicopathological features and survival outcomes of triple-negative breast cancer (TNBC) according to different histological subtypes. Methods: Using the Surveillance, Epidemiology, and End Results database, we included TNBC cases in 2010-2013. The effect of histological subtype on breast cancer-specific survival (BCSS) and overall survival (OS) were analyzed using univariate and multivariate analyses. Results: A total of 19,900 patients were identified. Infiltrating ductal carcinoma not otherwise specified accounted for 91...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29344271/clinical-pathological-characteristics-and-prognostic-factors-for-papillary-thyroid-microcarcinoma-in-the-elderly
#5
Jing Tang, Hans B Liu, Lujiao Yu, Xin Meng, Sean X Leng, Haiyan Zhang
Background: The incidence of papillary thyroid microcarcinoma (PTMC) has increased dramatically over the past three decades worldwide. The annual rate of increase in the elderly (≥65) PTMC patients is 1.4 times higher than that in the adult (<65) PTMC patients. The aim of the present study is to identify the clinical-pathological characteristics and prognostic factors in the elderly PTMC patients. Methods: The source population is PTMC patients whose information is available in the Surveillance, Epidemiology and End Results (SEER) database (2004-2013)...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29342999/-risk-factors-analysis-and-prognosis-of-renal-pelvis-dilatation-in-high-risk-infants-in-monocenter
#6
Q Fu, L R Fan, Y Shen, G J Zhou, H Z Yi, N Sun, J M Wang, L Q Jia, X M Wang, H Wang
Objective: To explore the prognosis and risk factors of pyelectasis in high-risk infants. Methods: This was a retrospective study. Totally 960 high-risk infants, who accepted type B ultrasonic examination for fetus at 28th week of gestation and for newborns in 48 hours after birth, were included in the study in departments of obstetrics and eonatology, Shunyi Maternal and Children's Hospital of Beijing Children's Hospital during May 2012 to April 2013. The degree of pyelectasis was classified using Grignon grade and the paients were followed up for 3 years...
January 2, 2018: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/29341983/diarrheagenic-escherichia-coli-and-acute-gastroenteritis-in-children-in-davidson-county-tennessee-united-states-a-case-control-study
#7
Aamer Imdad, Monique A Foster, Junaid Iqbal, Christopher Fonnesbeck, Daniel C Payne, Chengxian Zhang, James D Chappell, Natasha Halasa, Oscar G Gómez-Duarte
BACKGROUND: Diarrheagenic Escherichia coli (DEC) are an important cause of acute gastroenteritis in children; however, there is limited information available on the epidemiology, phylogenetics, serotyping, and antibiotic susceptibility of DEC in children in the United States. The aim of this study was to determine the molecular epidemiology of DEC among children with and without acute gastroenteritis in Davidson County, Tennessee. METHODS: This prospective, frequency matched, case-control study recruited subjects 15 days to 17 years of age and detected DEC with polymerase chain reaction from stool samples...
January 16, 2018: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29341220/prevalence-of-rhodococcus-equi-from-the-nasal-cavity-of-1-010-apparently-healthy-horses
#8
L T Gressler, G Machado, B P da Silveira, N D Cohen, L G Corbellini, V B Leotti, G N Diehl, L C Dos Santos, A Castagna de Vargas
BACKGROUND: Rhodococcus equi is an important cause of foal pneumonia. While its isolation from different sources has been widely evaluated, there is a need to better understand the R. equi epidemiology from samples of the nasal cavity of healthy horses. OBJECTIVES: To determine the prevalence of R. equi from the nasal cavity of healthy horses, along with its virulence profile, antimicrobial susceptibility, and environmental variables associated. STUDY DESIGN: Cross-sectional study...
January 17, 2018: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29340210/treetime-maximum-likelihood-phylodynamic-analysis
#9
Pavel Sagulenko, Vadim Puller, Richard A Neher
Mutations that accumulate in the genome of cells or viruses can be used to infer their evolutionary history. In the case of rapidly evolving organisms, genomes can reveal their detailed spatiotemporal spread. Such phylodynamic analyses are particularly useful to understand the epidemiology of rapidly evolving viral pathogens. As the number of genome sequences available for different pathogens has increased dramatically over the last years, phylodynamic analysis with traditional methods becomes challenging as these methods scale poorly with growing datasets...
January 2018: Virus Evolution
https://www.readbyqxmd.com/read/29339976/detection-of-dioxin-induced-demethylation-of-mouse-cyp1a1-gene-promoter-by-a-new-labeling-method-for-short-dna-fragments-possessing-5-methylcytosine-at-the-end
#10
Hisaka Kurita, Toshiki Aiba, Toshiyuki Saito, Seiichiroh Ohsako
Environmental factors stimulate alteration of DNA methylation level. Investigation of the genome-wide DNA methylation status is important for environmental health studies. We here designed a genomic DNA amplification and labeling protocol using a methylation-sensitive restriction enzyme HinP1 I. This method can specifically amplify genomic DNA fragments possessing methyl-CpG at the end. The fragments are a relatively short size and dominantly located on CpG-islands. By using the samples prepared by this method, a dioxin-induced change in the methylation level of the mouse Cyp1a1 promoter was successfully evaluated using oligonucleotide probes covalently bound onto a glass plate...
2018: Genes and Environment: the Official Journal of the Japanese Environmental Mutagen Society
https://www.readbyqxmd.com/read/29339262/the-long-term-physical-and-psychological-health-impacts-of-flooding-a-systematic-mapping
#11
REVIEW
Shuang Zhong, Lianping Yang, Sam Toloo, Zhe Wang, Shilu Tong, Xiaojie Sun, David Crompton, Gerard FitzGerald, Cunrui Huang
BACKGROUND: Flooding has caused significant and wide ranging long-term health impacts for affected populations. However, until now, the long-term health outcomes, epidemiological trends and specific impact factors of flooding had not been identified. In this study, the relevant literature was systematically mapped to create the first synthesis of the evidence of the long-term health impacts of flooding. METHODS: The systematic mapping method was used to collect and categorize all the relevant literature...
January 13, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29338786/a-systematic-review-of-transfusion-transmitted-malaria-in-non-endemic-areas
#12
Federica Verra, Andrea Angheben, Elisa Martello, Giovanni Giorli, Francesca Perandin, Zeno Bisoffi
BACKGROUND: Transfusion-transmitted malaria (TTM) is an accidental Plasmodium infection caused by whole blood or a blood component transfusion from a malaria infected donor to a recipient. Infected blood transfusions directly release malaria parasites in the recipient's bloodstream triggering the development of high risk complications, and potentially leading to a fatal outcome especially in individuals with no previous exposure to malaria or in immuno-compromised patients. A systematic review was conducted on TTM case reports in non-endemic areas to describe the epidemiological characteristics of blood donors and recipients...
January 16, 2018: Malaria Journal
https://www.readbyqxmd.com/read/29338535/different-lymph-node-staging-systems-for-patients-with-adenocarcinoma-of-esophagogastric-junction
#13
Zhangjian Zhou, Xin Xie, Nan Hao, Dongmei Diao, Yongchun Song, Peng Xia, Chengxue Dang, Hao Zhang
OBJECTIVE: In addition to the traditional TNM N staging system, lymph node ratio (LNR) and log odds of metastatic lymph nodes (LODDS) staging methods were developed in cancers. We aimed to examine their relative prognostic performance in patients with adenocarcinoma of esophagogastric junction (AEG). PATIENTS AND METHODS: Patients who underwent surgical resection for AEG were identified from the Surveillance, Epidemiology, and End Results (SEER) Program and the First Affiliated Hospital of Xi'an Jiaotong University as the training and validation sets, respectively...
January 17, 2018: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/29337607/foodborne-disease-outbreaks-in-the-united-states-a-historical-overview
#14
Timothy F Jones, Jane Yackley
Understanding the epidemiology of foodborne disease outbreaks (FBDOs) is important for informing investigation, control, and prevention methods. We examined annual summary FBDO data in the United States from 1938 to 2015, to help understand the epidemiology of outbreaks over time. Due to changes in reporting procedures, before 1998, the mean number of annual outbreaks was 378, and after that, it was 1062. A mean of 42% had a known etiology during 1961-1998; since then the etiology has been identified in ∼65%, with a marked increase in the number of norovirus outbreaks...
January 2018: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/29337007/postnatal-post-traumatic-stress-an-integrative-review
#15
Madeleine Simpson, Virginia Schmied, Cathy Dickson, Hannah Grace Dahlen
PROBLEM: Post-traumatic stress disorder and post-traumatic stress symptoms following birth occur amongst a small proportion of women but can lead to poor maternal mental health, impairment in mother-infant bonding and relationship stress. This integrative review aims to examine the associated risk factors and women's own experiences of postnatal post-traumatic stress in order to better understand this phenomenon. METHOD: Fifty three articles were included and critically reviewed using the relevant Critical Appraisal Skills Program checklists or Strengthening the Reporting of Observational studies in Epidemiology assessment tool...
January 11, 2018: Women and Birth: Journal of the Australian College of Midwives
https://www.readbyqxmd.com/read/29336594/incorporating-whole-genome-sequencing-into-public-health-surveillance-lessons-from-prospective-sequencing-of-salmonella-typhimurium-in-australia
#16
Laura Ford, Glen P Carter, Qinning Wang, Torsten Seemann, Vitali Sintchenko, Kathryn Glass, Deborah A Williamson, Peter Howard, Mary Valcanis, Cristina Fabiola Sotomayor Castillo, Michelle Sait, Benjamin P Howden, Martyn D Kirk
In Australia, the incidence of Salmonella Typhimurium has increased dramatically over the past decade. Whole-genome sequencing (WGS) is transforming public health microbiology, but poses challenges for surveillance. To compare WGS-based approaches with conventional typing for Salmonella surveillance, we performed concurrent WGS and multilocus variable-number tandem-repeat analysis (MLVA) of Salmonella Typhimurium isolates from the Australian Capital Territory (ACT) for a period of 5 months. We exchanged data via a central shared virtual machine and performed comparative genomic analyses...
January 16, 2018: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/29335073/-enhance-research-prevention-and-control-of-pertussis-for-protecting-public-confidence-in-vaccination-focus-on-the-adverse-events-of-vaccine-with-insufficient-potency-and-its-long-term-impacts
#17
Kai-Hu Yao, Ju Jia
On November 3, 2017, the China Food and Drug Administration reported that the potency indexes of two batches of diphtheria-pertussis-tetanus vaccines produced by two companies did not reach the requirements. Insufficient potency could affect the protection effect of these vaccines immunization. Currently, pertussis cases have already showed an increasing trend in China and could last for several years. Such an increase could be linked to these adverse events of vaccine with insufficient potency, which could become an evidence to challenge or deny the effectiveness of vaccination, and brings a persistent inhibition of the public's acceptance for vaccination...
January 2018: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29334859/bayesian-analysis-of-semi-parametric-cox-models-with-latent-variables
#18
Jingheng Cai, Chenyi Liang
Respiratory cancer is one of the most commonly diagnosed cancers as well as the leading cause of cancer death. Numerous efforts have been devoted to reducing the death rate of respiratory cancer. In this article, we propose a semi-parametric Cox model with latent variables to assess the effects of observed and latent risk factors on survival time of respiratory cancer. The characteristics of latent risk factors are characterized via multiple observed indicators by a confirmatory factor analysis model. We develop a Bayesian estimation procedure to obtain the estimates of parameters...
January 1, 2018: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/29334710/-a-study-on-genotype-of-271-mycobacterium-tuberculosis-isolates-in-6-prefectures-in-yunnan-province
#19
L Y Chen, X Yang, H H Ru, H J Yang, S Q Yan, L Ma, J O Chen, R Yang, L Xu
Objective: To understand the characteristics of genotypes of Mycobacterium tuberculosis isolates in Yunnan province, and provide the molecular epidemiological evidence for prevention and control of tuberculosis in Yunnan Province. Methods: Mycobacterium Tuberculosis isolates were collected from 6 prefectures of Yunnan province in 2014 and their Genetypes of Mycobacterium tuberculosis isolates were obtained using spoligotyping and multiple locus variable numbers of tandem repeats analysis (MLVA). The results of spoligotyping were entered into the SITVITWEB database to obtain the Spoligotyping International Type (SIT) patterns and the sublineages of MTB isolates...
January 6, 2018: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/29334709/-molecular-epidemiological-study-of-human-coronavirus-oc43-in-shanghai-from-2009-2016
#20
Y J Yang, Y W Hu
Objective: To understand the epidemiological characteristics of Human coronavirus (HCoV), the patterns of emergence and circulation, and the genotype distribution of human coronavirus OC43 (HCoV-OC43) from November, 2009 to April, 2016 in Shanghai. Methods: A total of 6 059 respiratory specimens, including pharyngeal swab, sputum, nasopharyngeal aspirates and alveolar lavage fluid, as well as relative clinical data were collected from patients with acute respiratory infections from seven sentinel hospitals during November, 2009 to April, 2016 in Shanghai...
January 6, 2018: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
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