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Surveillance bias

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https://www.readbyqxmd.com/read/28104317/a-two-phase-sampling-survey-for-nonresponse-and-its-paradata-to-correct-nonresponse-bias-in-a-health-surveillance-survey
#1
G Santin, L Bénézet, B Geoffroy-Perez, J Bouyer, A Guéguen
BACKGROUND: The decline in participation rates in surveys, including epidemiological surveillance surveys, has become a real concern since it may increase nonresponse bias. The aim of this study is to estimate the contribution of a complementary survey among a subsample of nonrespondents, and the additional contribution of paradata in correcting for nonresponse bias in an occupational health surveillance survey. METHODS: In 2010, 10,000 workers were randomly selected and sent a postal questionnaire...
January 16, 2017: Revue D'épidémiologie et de Santé Publique
https://www.readbyqxmd.com/read/28103325/assessing-fifty-years-of-general-health-surveillance-of-roe-deer-in-switzerland-a-retrospective-analysis-of-necropsy-reports
#2
Mirjam Pewsner, Francesco Carlo Origgi, Joachim Frey, Marie-Pierre Ryser-Degiorgis
General wildlife health surveillance is a valuable source of information on the causes of mortality, disease susceptibility and pathology of the investigated hosts and it is considered to be an essential component of early warning systems. However, the representativeness of data from such surveillance programs is known to be limited by numerous biases. The roe deer (Capreolus capreolus capreolus) is the most abundant ungulate and a major game species all over Europe. Yet, internationally available literature on roe deer pathology is scarce...
2017: PloS One
https://www.readbyqxmd.com/read/28099688/discerning-the-survival-advantage-among-patients-with-prostate-cancer-who-undergo-radical-prostatectomy-or-radiotherapy-the-limitations-of-cancer-registry-data
#3
Stephen B Williams, Jinhai Huo, Karim Chamie, Marc C Smaldone, Christopher D Kosarek, Justin E Fang, Leslie M Ynalvez, Simon P Kim, Karen E Hoffman, Sharon H Giordano, Brian F Chapin
BACKGROUND: The objective of this study was to compare the overall survival of patients who undergo radical prostatectomy or radiotherapy versus noncancer controls to discern whether there is a survival advantage according to prostate cancer treatment and the impact of selection bias on these results. METHODS: A matched cohort study was performed using the Surveillance, Epidemiology, and End Results (SEER)-Medicare-linked database. In total, 34,473 patients ages 66 to 75 years were identified who were without significant comorbidity, were diagnosed with localized prostate cancer, and received treatment treated with surgery or radiotherapy between 2004 and 2011...
January 18, 2017: Cancer
https://www.readbyqxmd.com/read/28099518/evaluation-of-methods-for-the-concentration-and-extraction-of-viruses-from-sewage-in-the-context-of-metagenomic-sequencing
#4
Mathis Hjort Hjelmsø, Maria Hellmér, Xavier Fernandez-Cassi, Natàlia Timoneda, Oksana Lukjancenko, Michael Seidel, Dennis Elsässer, Frank M Aarestrup, Charlotta Löfström, Sílvia Bofill-Mas, Josep F Abril, Rosina Girones, Anna Charlotte Schultz
Viral sewage metagenomics is a novel field of study used for surveillance, epidemiological studies, and evaluation of waste water treatment efficiency. In raw sewage human waste is mixed with household, industrial and drainage water, and virus particles are, therefore, only found in low concentrations. This necessitates a step of sample concentration to allow for sensitive virus detection. Additionally, viruses harbor a large diversity of both surface and genome structures, which makes universal viral genomic extraction difficult...
2017: PloS One
https://www.readbyqxmd.com/read/28097361/folic-acid-supplementation-for-the-prevention-of-neural-tube-defects-an-updated-evidence-report-and-systematic-review-for-the-us-preventive-services-task-force
#5
Meera Viswanathan, Katherine A Treiman, Julia Kish-Doto, Jennifer C Middleton, Emmanuel J L Coker-Schwimmer, Wanda K Nicholson
Importance: Neural tube defects are among the most common congenital anomalies in the United States. Periconceptional folic acid supplementation is a primary care-relevant preventive intervention. Objective: To review the evidence on folic acid supplementation for preventing neural tube defects to inform the US Preventive Services Task Force for an updated Recommendation Statement. Data Sources: MEDLINE, Cochrane Library, EMBASE, and trial registries through January 28, 2016, with ongoing surveillance through November 11, 2016; references; experts...
January 10, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28095597/recollection-bias-and-its-underpinnings-lessons-from-terrorism-risk-assessments
#6
W Kip Viscusi, Richard J Zeckhauser
Recollection bias is the phenomenon whereby people who observe a highly unexpected event hold current risk beliefs about a similar event that are no higher than their recollection of their prior beliefs. This article replicates and extends the authors' previous study of recollection bias in relation to individuals' perceptions of the risks of terrorism attacks. Over 60% of respondents in a national U.S. sample of over 900 adults believe that the current risk of a future terrorist attack by either an airplane or in a public setting is no higher than they recall having believed, respectively, before the 9/11 attack and before the Boston Marathon bombing...
January 17, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28086776/comparison-of-two-adult-mosquito-sampling-methods-with-human-landing-catches-in-south-central-ethiopia
#7
Oljira Kenea, Meshesha Balkew, Habte Tekie, Teshome Gebre-Michael, Wakgari Deressa, Eskindir Loha, Bernt Lindtjørn, Hans J Overgaard
BACKGROUND: The human landing catch (HLC) is the standard reference method for measuring human exposure to mosquito bites. However, HLC is labour-intensive, exposes collectors to infectious mosquito bites and is subjected to collector bias. These necessitate local calibration and application of alternative methods. This study was undertaken to determine the relative sampling efficiency (RSE) of light traps with or without yeast-produced carbon dioxide bait vs. HLC in south-central Ethiopia...
January 13, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28081537/impact-of-disease-stage-and-aetiology-on-survival-in-hepatocellular-carcinoma-implications-for-surveillance
#8
Philip Johnson, Sarah Berhane, Chiaki Kagebayashi, Shinji Satomura, Mabel Teng, Richard Fox, Winnie Yeo, Frankie Mo, Paul Lai, Stephen L Chan, Toshifumi Tada, Hidenori Toyoda, Takashi Kumada
BACKGROUND: Variation in survival in hepatocellular carcinoma (HCC) has been attributed to different aetiologies or disease stages at presentation. While international guidelines recommend surveillance of high-risk groups to permit early diagnosis and curative treatment, the evidence that surveillance decreases disease-specific mortality is weak. METHODS: We compared HCC survival figures from Japan (n=1174) and Hong Kong (n=1675) over similar time periods (Japan 2000-2013, Hong Kong, China 2003-2014)...
January 12, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28053012/phylogenetic-tools-for-generalized-hiv-1-epidemics-findings-from-the-pangea-hiv-methods-comparison
#9
Oliver Ratmann, Emma B Hodcroft, Michael Pickles, Anne Cori, Matthew Hall, Samantha Lycett, Caroline Colijn, Bethany Dearlove, Xavier Didelot, Simon Frost, A S Md Mukarram Hossain, Jeffrey B Joy, Michelle Kendall, Denise Kühnert, Gabriel E Leventhal, Richard Liang, Giacomo Plazzotta, Art F Y Poon, David A Rasmussen, Tanja Stadler, Erik Volz, Caroline Weis, Andrew J Leigh Brown, Christophe Fraser
Viral phylogenetic methods contribute to understanding how HIV spreads in populations, and thereby help guide the design of prevention interventions. So far, most analyses have been applied to well-sampled concentrated HIV-1 epidemics in wealthy countries. To direct the use of phylogenetic tools to where the impact of HIV-1 is greatest, the Phylogenetics And Networks for Generalized HIV Epidemics in Africa (PANGEA-HIV) consortium generates full-genome viral sequences from across sub-Saharan Africa. Analyzing these data presents new challenges, since epidemics are principally driven by heterosexual transmission and a smaller fraction of cases is sampled...
January 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28045347/depression-treatment-among-elderly-medicare-beneficiaries-with-incident-cases-of-cancer-and-newly-diagnosed-depression
#10
Monira Alwhaibi, Suresh Madhavan, Thomas Bias, Kimberly Kelly, Jamie Walkup, Usha Sambamoorthi
OBJECTIVE: Depression treatment can improve the health outcomes of elderly cancer survivors. There is a paucity of studies on the extent to which depression is treated among elderly cancer survivors. Therefore, this study estimated the rates of depression treatment among elderly cancer survivors and identified the factors affecting depression treatment. METHODS: A retrospective cohort study design was adopted, and data were obtained from the linked Surveillance, Epidemiology and End Results (SEER) and Medicare database...
January 3, 2017: Psychiatric Services: a Journal of the American Psychiatric Association
https://www.readbyqxmd.com/read/28030503/prophylaxis-against-venous-thromboembolism-in-pediatric-trauma-a-practice-management-guideline-from-the-eastern-association-for-the-surgery-of-trauma-and-the-pediatric-trauma-society
#11
Arash Mahajerin, John K Petty, Sheila J Hanson, A Jill Thompson, Sarah H OʼBrien, Christian J Streck, Toni M Petrillo, E Vincent S Faustino
BACKGROUND: Despite the increasing incidence of venous thromboembolism (VTE) in hospitalized children, the risks and benefits of VTE prophylaxis, particularly for those hospitalized after trauma, are unclear. The Pediatric Trauma Society and the Eastern Association for the Surgery of Trauma convened a writing group to develop a practice management guideline on VTE prophylaxis for this cohort of children using the Grading of Recommendations Assessment, Development and Evaluation framework...
December 23, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28025546/the-use-and-interpretation-of-sodium-concentrations-in-casual-spot-urine-collections-for-population-surveillance-and-partitioning-of-dietary-iodine-intake-sources
#12
REVIEW
Joel Conkle, Frits van der Haar
In 2013, the World Health Organization (WHO) called for joint surveillance of population salt and iodine intakes using urinary analysis. 24-h urine collection is considered the gold standard for salt intake assessment, but there is an emerging consensus that casual urine sampling can provide comparable information for population-level surveillance. Our review covers the use of the urinary sodium concentration (UNaC) and the urinary iodine concentration (UIC) from casual urine samples to estimate salt intakes and to partition the sources of iodine intakes...
December 23, 2016: Nutrients
https://www.readbyqxmd.com/read/28012461/ten-years-in-the-dump-an-updated-review-of-the-miocene-primate-bearing-localities-from-abocador-de-can-mata-ne-iberian-peninsula
#13
David M Alba, Isaac Casanovas-Vilar, Miguel Garcés, Josep M Robles
More than ten years of paleontological fieldwork during the enlargement of the Can Mata Landfill (Abocador de Can Mata [ACM]), in els Hostalets de Pierola (Vallès-Penedès Basin, NE Iberian Peninsula) led to the recovery of >60,000 Miocene vertebrate remains. The huge sampling effort (due to continuous surveillance of heavy machinery digging activity, coupled with manual excavation and screen-washing of sediments) enabled generally rare faunal elements such as pliopithecoid and hominoid primates to be found...
January 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28001203/-income-and-smoking-prevalence-in-latin-america-a-systematic-review-and-meta-analysis
#14
Ariel Bardach, Herney Andrés García Perdomo, Ruth Amanda Ruano Gándara, Agustín Ciapponi
Objective: Determine the relationship between tobacco-use prevalence and smoker income level in Latin America and the Caribbean (LAC). Methods: A systematic search was carried out in MEDLINE, EMBASE, CENTRAL, SOCINDEX, and LILACS databases. Studies from LAC published from January 1989 to December 2015 were included and were analyzed by subgroups disaggregated by decade of data, country, bias risk, sex, and age group. Results: Of 1 254 studies evaluated by full text, 29 articles were included, of which 25 were chosen for meta-analysis...
October 2016: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/27966541/prevalence-birth-incidence-and-penetrance-of-von-hippel-lindau-disease-vhl-in-denmark
#15
Marie Louise Mølgaard Binderup, Michael Galanakis, Esben Budtz-Jørgensen, Michael Kosteljanetz, Marie Luise Bisgaard
Von Hippel-Lindau disease (vHL) is a rare hereditary tumour predisposition with multiorgan involvement that is not always easily recognized. The disease is reported to be almost fully penetrant at age 60 years. Previous estimates of vHL prevalence and incidence are all regional and vary widely. Most are >20 years old and prone to selection bias because of inclusion of only clinically affected vHL patients who were diagnosed before genetic testing was available. In an unselected cohort of all known Danish carriers of a disease-causing VHL variant, we assessed vHL penetrance on a national basis...
December 14, 2016: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/27965970/relevance-of-indirect-transmission-for-wildlife-disease-surveillance
#16
Martin Lange, Stephanie Kramer-Schadt, Hans-Hermann Thulke
Epidemiological models of infectious diseases are essential tools in support of risk assessment, surveillance design, and contingency planning in public and animal health. Direct pathogen transmission from host to host is an essential process of each host-pathogen system and respective epidemiological modeling concepts. It is widely accepted that numerous diseases involve indirect transmission (IT) through pathogens shed by infectious hosts to their environment. However, epidemiological models largely do not represent pathogen persistence outside the host explicitly...
2016: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/27939085/a-seer-database-analysis-of-the-survival-advantage-of-transarterial-chemoembolization-for-hepatocellular-carcinoma-an-underutilized-therapy
#17
Stephen H Gray, Jared A White, Peng Li, Meredith L Kilgore, David T Redden, Ahmed K Abdel Aal, Heather N Simpson, Brendan McGuire, Devin E Eckhoff, Derek A Dubay
PURPOSE: To measure transarterial chemoembolization utilization and survival benefit among patients with hepatocellular carcinoma (HCC) in the Surveillance, Epidemiology, and End Results (SEER) patient population. MATERIALS AND METHODS: A retrospective study identified 37,832 patients with HCC diagnosed between 1991 and 2011. Survival was estimated by Kaplan-Meier method and compared by log-rank test. Propensity-score matching was used to address an imbalance of covariates...
December 8, 2016: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/27938782/methodological-considerations-for-surveillance-in-gi-practice
#18
REVIEW
Øyvind Holme, Magnus Løberg
Surveillance is recommended for various GI cancers, and substantial resources are invested. However, little is known about the effect of surveillance, neither for good, nor for bad. Most evidence stems from observational studies, but observational studies of surveillance can be subject to various biases that may severely influence the results. In this chapter we discuss challenges related to various research questions, study designs, choice of endpoints, and how to deal with different forms of bias. We hope this chapter will be helpful for researchers when performing high-quality studies of surveillance, and to enable physicians and policy-makers to understand the possibilities and limitations of current evidence...
December 2016: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/27927666/epigenetic-biomarkers-in-progression-from-non-dysplastic-barrett-s-oesophagus-to-oesophageal-adenocarcinoma-a-systematic-review-protocol
#19
T Nieto, C L Tomlinson, J Dretzke, S Bayliss, M Dilworth, A D Beggs, O Tucker
INTRODUCTION: Barrett's oesophagus (BO), a metaplastic condition affecting the lower oesophagus due to long-standing gastro-oesophageal reflux and chronic inflammation, is a precursor lesion for oesophageal adenocarcinoma (OADC). There is no clinical test to predict which patients with BO will progress to OADC. The British Society of Gastroenterology recommends endoscopic surveillance of patients with BO. Epigenetic changes have been well characterised in the neoplastic progression of ulcerative colitis to colonic carcinoma, another gastrointestinal cancer associated with chronic inflammation...
December 7, 2016: BMJ Open
https://www.readbyqxmd.com/read/27925424/evaluation-of-an-institutional-project-to-improve-venous-thromboembolism-prevention
#20
REVIEW
Christina A Minami, Anthony D Yang, Mila Ju, Eckford Culver, Kathryn Seifert, Lindsey Kreutzer, Terri Halverson, Kevin J O'Leary, Karl Y Bilimoria
BACKGROUND: Northwestern Memorial Hospital (NMH) was historically a poor performer on the venous thromboembolism (VTE) outcome measure. As this measure has been shown to be flawed by surveillance bias, NMH embraced process-of-care measures to ensure appropriate VTE prophylaxis to assess healthcare-associated VTE prevention efforts. OBJECTIVE: To evaluate the impact of an institution-wide project aimed at improving hospital performance on VTE prophylaxis measures...
December 2016: Journal of Hospital Medicine: An Official Publication of the Society of Hospital Medicine
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