keyword
MENU ▼
Read by QxMD icon Read
search

Surveillance bias

keyword
https://www.readbyqxmd.com/read/28338912/invited-commentary-the-tao-of-clinical-cohort-analysis-when-the-transitions-that-can-be-spoken-of-are-not-the-true-transitions
#1
Stephen J Mooney
Patterns in risk-related behaviors identified using clinically deployed surveys may hold value for public health surveillance. However, because such surveys assess subjects only when subjects choose to visit clinics, clinical data are subject to variability in observation patterns that is not present in conventional longitudinal data sets in which research teams contact subjects at regular intervals. In this issue of the Journal, Wilkinson et al. (Am J Epidemiol. 2017;000(00):000-000) describe how they applied a latent transition analysis technique to surveillance data collected during clinic visits...
March 10, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338879/evidence-for-detection-bias-by-medication-use-in-a-cohort-study-of-breast-cancer-survivors
#2
Heidi S Wirtz, Gregory S Calip, Diana S M Buist, Julie R Gralow, William E Barlow, Shelly Gray, Denise M Boudreau
In previous studies, we found modestly decreased and increased risks of second breast cancer events with the use of statins and antibiotics, respectively, after adjustment for surveillance mammography. We evaluated detection bias by comparing receipt of surveillance mammography among users of these 2 disparate classes of medication. Adult women diagnosed with early-stage breast cancer during 1990-2008 (n = 3,965) while enrolled in an integrated health-care plan (Group Health Cooperative; Washington State) were followed for up to 10 years in the Commonly Used Medications and Breast Cancer Outcomes (COMBO) Study...
March 1, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28334753/alcohol-screening-among-young-people-a-prospective-study-from-the-swiss-sentinel-surveillance-system-sentinella-of-physicians-a-priori-opinions
#3
Coralie Wenger-Bonny, Adjua Alexandra N'goran, Jérôme Pasquier, Charles Dvorak, Dagmar M Haller, Lilli Herzig
Background.: Systematic screening for excessive alcohol use among young people is recommended but rarely implemented. Family practitioners tend to select patients for screening, based on their preliminary subjective opinions, which may be biased. Objective.: To evaluate the ability of family practitioners to identify excessive alcohol use among young people prior to screening them. Methods.: This prospective study was conducted through Sentinella, an epidemiological network involving 150 family practitioners across Switzerland...
February 22, 2017: Family Practice
https://www.readbyqxmd.com/read/28331624/comparison-of-hydroxyethyl-starch-regulatory-summaries-from-the-food-and-drug-administration-and-the-european-medicines-agency
#4
Christian J Wiedermann, Klaus Eisendle
This article aims to highlight the positions of the Food and Drug Administration and the European Medicines Agency regarding use and marketing of hydroxyethyl starch (HES) products, and how these have changed over recent years. In 2013, warnings from both agencies advised against use of HES in critically ill patients, including patients with sepsis, when several large randomized controlled trials on volume resuscitation in critical illness failed to observe clinically beneficial effects of HES. In areas such as patient monitoring and requirements for further clinical trials, the FDA and EMA are very much in agreement in their recommendations...
2017: Journal of Pharmaceutical Policy and Practice
https://www.readbyqxmd.com/read/28325822/structural-basis-for-chemokine-recognition-by-a-g-protein-coupled-receptor-and-implications-for-receptor-activation
#5
Joshua J Ziarek, Andrew B Kleist, Nir London, Barak Raveh, Nicolas Montpas, Julien Bonneterre, Geneviève St-Onge, Crystal J DiCosmo-Ponticello, Chad A Koplinski, Ishan Roy, Bryan Stephens, Sylvia Thelen, Christopher T Veldkamp, Frederick D Coffman, Marion C Cohen, Michael B Dwinell, Marcus Thelen, Francis C Peterson, Nikolaus Heveker, Brian F Volkman
Chemokines orchestrate cell migration for development, immune surveillance, and disease by binding to cell surface heterotrimeric guanine nucleotide-binding protein (G protein)-coupled receptors (GPCRs). The array of interactions between the nearly 50 chemokines and their 20 GPCR targets generates an extensive signaling network to which promiscuity and biased agonism add further complexity. The receptor CXCR4 recognizes both monomeric and dimeric forms of the chemokine CXCL12, which is a distinct example of ligand bias in the chemokine family...
March 21, 2017: Science Signaling
https://www.readbyqxmd.com/read/28322880/analyzing-the-impact-of-public-transit-usage-on-obesity
#6
Zhaowei She, Douglas M King, Sheldon H Jacobson
The objective of this paper is to estimate the impact of county-level public transit usage on obesity prevalence in the United States and assess the potential for public transit usage as an intervention for obesity. This study adopts an instrumental regression approach to implicitly control for potential selection bias due to possible differences in commuting preferences among obese and non-obese populations. United States health data from the 2009 Behavioral Risk Factor Surveillance System and transportation data from the 2009 National Household Travel Survey are aggregated and matched at the county level...
March 16, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28318379/prevalence-and-distribution-of-pseudogymnoascus-destructans-in-michigan-bats-submitted-for-rabies-surveillance
#7
Samantha L Darling, Ailam Lim, Julie R Melotti, Daniel J O'Brien, Steven R Bolin
Since 2006, bat populations in North America have suffered devastating mortality from an emerging disease known as white-nose syndrome (WNS). The causal agent of WNS is the fungus Pseudogymnoascus destructans. In April 2014, WNS was discovered in little brown bats ( Myotis lucifugus ) in Michigan, and has since been documented in 12 counties. Because current surveillance for WNS focuses primarily on mine-hibernating species in winter, it is subject geographic, species, and seasonal bias. To investigate species affected and potential associations of gender, seasonal life cycle, and region with P...
March 20, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28315607/correcting-bias-due-to-missing-stage-data-in-the-non-parametric-estimation-of-stage-specific-net-survival-for-colorectal-cancer-using-multiple-imputation
#8
Milena Falcaro, James R Carpenter
BACKGROUND: Population-based net survival by tumour stage at diagnosis is a key measure in cancer surveillance. Unfortunately, data on tumour stage are often missing for a non-negligible proportion of patients and the mechanism giving rise to the missingness is usually anything but completely at random. In this setting, restricting analysis to the subset of complete records gives typically biased results. Multiple imputation is a promising practical approach to the issues raised by the missing data, but its use in conjunction with the Pohar-Perme method for estimating net survival has not been formally evaluated...
March 15, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/28303130/new-approaches-on-quantification-of-campylobacter-jejuni-in-poultry-samples-the-use-of-digital-pcr-and-real-time-pcr-against-the-iso-standard-plate-count-method
#9
Bojan Papić, Mateja Pate, Urška Henigman, Urška Zajc, Igor Gruntar, Majda Biasizzo, Matjaž Ocepek, Darja Kušar
Campylobacteriosis is the most frequently reported bacterial food-borne illness in the European Union and contaminated broiler meat is considered the most important source of infection in humans. The aim of the present study was to evaluate real-time PCR (qPCR) and digital PCR (dPCR) for quantification of Campylobacter jejuni in 75 broiler neck-skin samples collected from a poultry slaughterhouse, and to compare them with the ISO 10272-2 standard plate count method. For qPCR standard curve, C. jejuni-negative neck-skin samples were spiked with C...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28300305/psoriasis-and-increased-drug-utilization-a-true-burden-of-psoriasis-or-potential-surveillance-bias-of-comorbidities
#10
Z Z N Yiu
No abstract text is available yet for this article.
March 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28299449/contribution-of-job-exposure-matrices-for-exposure-assessment-in-occupational-safety-and-health-monitoring-systems-application-from-the-french-national-occupational-disease-surveillance-and-prevention-network
#11
Arnaud Florentin, Denis Zmirou-Navier, Christophe Paris
OBJECTIVES: To detect new hazards ("signals"), occupational health monitoring systems mostly rest on the description of exposures in the jobs held and on reports by medical doctors; these are subject to declarative bias. Our study aims to assess whether job-exposure matrices (JEMs) could be useful tools for signal detection by improving exposure reporting. METHODS: Using the French national occupational disease surveillance and prevention network (RNV3P) data from 2001 to 2011, we explored the associations between disease and exposure prevalence for 3 well-known pathology/exposure couples and for one debatable couple...
March 16, 2017: International Archives of Occupational and Environmental Health
https://www.readbyqxmd.com/read/28296805/does-nonlocal-women-s-attendance-at-antenatal-clinics-distort-hiv-prevalence-surveillance-estimates-in-pregnant-women-in-zimbabwe
#12
Katherine C Wilson, Mutsa Mhangara, Janet Dzangare, Jeffrey W Eaton, Timothy B Hallett, Owen Mugurungi, Simon Gregson
OBJECTIVE: The objective was to assess whether HIV prevalence measured among women attending antenatal clinics (ANCs) are representative of prevalence in the local area, or whether estimates may be biased by some women's choice to attend ANCs away from their residential location. We tested the hypothesis that HIV prevalence in towns and periurban areas is underestimated in ANC sentinel surveillance data in Zimbabwe. METHODS: National unlinked anonymous HIV surveillance was conducted at 19 ANCs in Zimbabwe in 2000, 2001, 2002, 2004, 2006, 2009, and 2012...
April 2017: AIDS
https://www.readbyqxmd.com/read/28296796/updates-to-the-spectrum-estimations-and-projections-package-model-for-estimating-trends-and-current-values-for-key-hiv-indicators
#13
John Stover, Tim Brown, Robert Puckett, Wiwat Peerapatanapokin
BACKGROUND: The Spectrum model is used by national programs and UNAIDS to prepare annual estimates of the status of the HIV epidemic in 160 countries. The model and assumptions are updated regularly under the guidance of the UNAIDS Reference Group on Estimates, Modelling and Projections in response to new data, studies, and program needs. This study describes the most recent updates for the 2016 round of estimates. METHODS: Meetings of the UNAIDS Reference Group include individuals with extensive knowledge of HIV programs, research, statistics, and public policy...
April 2017: AIDS
https://www.readbyqxmd.com/read/28267038/prevalence-of-hypertension-in-older-people-in-africa-a-systematic-review-and-meta-analysis
#14
Arnaud D Kaze, Aletta E Schutte, Sebhat Erqou, Andre P Kengne, Justin B Echouffo-Tcheugui
OBJECTIVE: The prevalence of hypertension in older people living on the African continent has not been comprehensively assessed. We aimed to provide accurate estimates of hypertension prevalence and variations by major predictive characteristics in this population to assist prevention and monitoring efforts. METHODS: For this systematic review and meta-analysis, we searched major electronic databases for population-based studies on hypertension prevalence reported from 1 January 2000 to 5 March 2016...
March 6, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28252226/death-of-recipients-after-kidney-living-donation-triples-donors-risk-of-dropping-out-from-follow-up
#15
Xavier Torres, Jordi Comas, Emma Arcos, Jaume Tort, Fritz Diekmann
Although kidney transplantation from the donation of a living donor is a safe treatment for end-stage renal disease, inferences about safety of living kidney donors might be biased by an informative censoring caused by the non-inclusion of a substantial percentage of donors lost-to-follow-up. With the aim of assessing the presence of a potential informative censoring in living kidney donation outcomes of Catalan donors for a period of 12 years, 573 donors followed and lost-to-follow-up were compared. Losses of follow-up over time were also assessed by univariate and multivariate survival analysis, along with Cox regression...
March 2, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28251917/long-term-survival-in-paraneoplastic-lambert-eaton-myasthenic-syndrome
#16
Paul Maddison, Paul Gozzard, Matthew J Grainge, Bethan Lang
OBJECTIVE: To establish whether improved tumor survival in patients with Lambert-Eaton myasthenic syndrome (LEMS) and small-cell lung cancer (SCLC) was due to known prognostic risk factors or an effect of LEMS independently, perhaps as a result of circulating factors. METHODS: We undertook a prospective observational cohort study of patients with LEMS attending Nottingham University Hospitals, UK, or via the British Neurological Surveillance Unit. In parallel, patients with a new diagnosis of biopsy-proven SCLC were enrolled, examined for neurologic illness, and followed up until death or study end...
March 1, 2017: Neurology
https://www.readbyqxmd.com/read/28248154/collaborative-care-and-active-surveillance-for-screen-positive-elders-with-subthreshold-depression-casper-a-multicentred-randomised-controlled-trial-of-clinical-effectiveness-and-cost-effectiveness
#17
Helen Lewis, Joy Adamson, Katie Atherton, Della Bailey, Jacqueline Birtwistle, Katharine Bosanquet, Emily Clare, Jaime Delgadillo, David Ekers, Deborah Foster, Rhian Gabe, Samantha Gascoyne, Lesley Haley, Rebecca Hargate, Catherine Hewitt, John Holmes, Ada Keding, Amanda Lilley-Kelly, Jahnese Maya, Dean McMillan, Shaista Meer, Jodi Meredith, Natasha Mitchell, Sarah Nutbrown, Karen Overend, Madeline Pasterfield, David Richards, Karen Spilsbury, David Torgerson, Gemma Traviss-Turner, Dominic Trépel, Rebecca Woodhouse, Friederike Ziegler, Simon Gilbody
BACKGROUND: Efforts to reduce the burden of illness and personal suffering associated with depression in older adults have focused on those with more severe depressive syndromes. Less attention has been paid to those with mild disorders/subthreshold depression, but these patients also suffer significant impairments in their quality of life and level of functioning. There is currently no clear evidence-based guidance regarding treatment for this patient group. OBJECTIVES: To establish the clinical effectiveness and cost-effectiveness of a low-intensity intervention of collaborative care for primary care older adults who screened positive for subthreshold depression...
February 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/28226252/linkage-of-traffic-crash-and-hospitalization-records-with-limited-identifiers-for-enhanced-public-health-surveillance
#18
Sarah Conderino, Lawrence Fung, Slavenka Sedlar, Jennifer M Norton
BACKGROUND: Motor vehicle traffic (MVT) crashes kill or seriously injure approximately 4250 people in New York City (NYC) each year. Traditionally, NYC surveillance practices use hospitalization and crash data separately to monitor trends in MVT-related injuries, but key information linking crash circumstances to health outcomes is lost when analyzing these data sources in isolation. Our objective was to match crash reports to hospitalization records to create a traffic injury surveillance dataset that can be used to describe crash circumstances and related injury outcomes...
February 19, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28202099/vibrio-alginolyticus-infections-in-the-usa-1988-2012
#19
K M Jacobs Slifka, A E Newton, B E Mahon
Vibrio alginolyticus causes soft tissue and bloodstream infection; little systematically collected clinical and epidemiological information is available. In the USA, V. alginolyticus infections are reported to the Cholera and Other Vibrio Illness Surveillance system. Using data from 1988 to 2012, we categorised infections using specimen source and exposure history, analysed case characteristics, and calculated incidence rates using US Census Bureau data. Most (96%) of the 1331 V. alginolyticus infections were from coastal states...
February 16, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28198645/three-decades-of-dengue-surveillance-in-five-highly-endemic-south-east-asian-countries
#20
T A Wartel, A Prayitno, S R S Hadinegoro, M R Capeding, U Thisyakorn, N H Tran, A Moureau, A Bouckenooghe, J Nealon, A-F Taurel
We described and quantified epidemiologic trends in dengue disease burden in 5 Asian countries (Indonesia, Thailand, Malaysia, Philippines, and Vietnam) and identified and estimated outbreaks impact over the last 3 decades. Dengue surveillance data from 1980 to 2010 were retrieved from DengueNet and from World Health Organization sources. Trends in incidence, mortality, and case fatality rate (CFR) were systematically analyzed using annual average percent change (AAPC), and the contribution of epidemic years identified over the observation period was quantified...
January 2017: Asia-Pacific Journal of Public Health
keyword
keyword
91227
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"