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Surveillance bias

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https://www.readbyqxmd.com/read/28525991/correcting-for-day-of-the-week-and-public-holiday-effects-improving-a-national-daily-syndromic-surveillance-service-for-detecting-public-health-threats
#1
Elizabeth Buckingham-Jeffery, Roger Morbey, Thomas House, Alex J Elliot, Sally Harcourt, Gillian E Smith
BACKGROUND: As service provision and patient behaviour varies by day, healthcare data used for public health surveillance can exhibit large day of the week effects. These regular effects are further complicated by the impact of public holidays. Real-time syndromic surveillance requires the daily analysis of a range of healthcare data sources, including family doctor consultations (called general practitioners, or GPs, in the UK). Failure to adjust for such reporting biases during analysis of syndromic GP surveillance data could lead to misinterpretations including false alarms or delays in the detection of outbreaks...
May 19, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28509356/assessments-of-pain-in-children-and-adolescents-with-cerebral-palsy-a-retrospective-population-based-registry-study
#2
Lena Westbom, Amanda Rimstedt, Eva Nordmark
AIM: To explore pain screening in CPUP, a follow-up surveillance programme for people with cerebral palsy (CP), specifically to describe reported pain prevalence, localizations, patterns of distribution; to compare with studies using psychometrically sound assessment instruments; and to assess agreement between pain documented in CPUP and medical records. METHOD: Registry study of a population with CP, born 1993 to 2008, living in Skåne, Sweden in 2013. Descriptive data, cross-tabulations, and chi-square tests to characterize and compare the study groups...
May 16, 2017: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/28501338/risk-factors-for-metabolic-syndrome-after-liver-transplantation-a-systematic-review-and-meta-analysis
#3
REVIEW
Line Buch Thoefner, Andreas Arendtsen Rostved, Hans-Christian Pommergaard, Allan Rasmussen
INTRODUCTION: Metabolic syndrome is associated with increased risk of cardiovascular events, which contributes to the elevated mortality rate among liver transplant recipients. The objective of this systematic review and meta-analysis was to assess the prevalence and risk factors for metabolic syndrome after liver transplantation. METHODS: The databases Medline and Scopus were searched for observational studies evaluating prevalence and risk factors for metabolic syndrome after liver transplantation...
April 23, 2017: Transplantation Reviews
https://www.readbyqxmd.com/read/28492929/hepatitis-c-virus-infection-among-reproductive-aged-women-and-children-in-the-united-states-2006-to-2014
#4
Kathleen N Ly, Ruth B Jiles, Eyasu H Teshale, Monique A Foster, Rick L Pesano, Scott D Holmberg
Background: In the United States, hepatitis C virus (HCV) infection has increased among young persons who inject drugs, but the extent of this epidemic among reproductive-aged women and their children is unknown. Objective: To estimate numbers and describe characteristics of reproductive-aged women with HCV infection and of their offspring. Design: Analysis of the National Notifiable Diseases Surveillance System (NNDSS) from 2006 to 2014 and the Quest Diagnostics Health Trends national database from 2011 to 2014...
May 9, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28465095/association-of-influenza-vaccination-during-pregnancy-with-birth-outcomes-in-nicaragua
#5
Carmen S Arriola, Nancy Vasconez, Mark G Thompson, Sonja J Olsen, Ann C Moen, Joseph Bresee, Alba María Ropero
BACKGROUND: Studies have shown that influenza vaccination during pregnancy reduces the risk of influenza disease in pregnant women and their offspring. Some have proposed that maternal vaccination may also have beneficial effects on birth outcomes. In 2014, we conducted an observational study to test this hypothesis using data from two large hospitals in Managua, Nicaragua. METHODS: We conducted a retrospective cohort study to evaluate associations between influenza vaccination and birth outcomes...
April 29, 2017: Vaccine
https://www.readbyqxmd.com/read/28462943/media-reporting-of-protect-a-disconnect-in-information-dissemination
#6
M E Westerman, B Bhindi, R Choo, M T Gettman, R J Karnes, L Klotz, S A Boorjian
BACKGROUND: Given the central role of the media in disseminating information to the public, we analyzed news coverage of the recent publication from ProtecT to assess views on treatment, the level of detail presented and degree of bias. METHODS: We applied a predefined search strategy to identify all news articles reporting on ProtecT within 30 days of its publication. Articles were independently assessed by two urologists and two lay persons using five-point Likert scales...
May 2, 2017: Prostate Cancer and Prostatic Diseases
https://www.readbyqxmd.com/read/28462471/how-many-transgender-men-are-there-in-san-francisco
#7
Willi McFarland, Erin Wilson, H Fisher Raymond
The purpose of this study was to estimate the number of transgender men (transmen) adults living in San Francisco. We integrated two population size estimation methods into a community-based health survey of transmen (n = 122) in the San Francisco Bay Area in 2014-2015: the service multiplier and wisdom of the crowds. The median estimate was 806 transmen adults in San Francisco (0.11% of adults) and 4027 in the Bay Area. Considering potential biases, we believe our estimates are conservative. Knowing the denominator of persons at risk for health conditions is necessary for public health planning, surveillance, and impact evaluation...
May 1, 2017: Journal of Urban Health: Bulletin of the New York Academy of Medicine
https://www.readbyqxmd.com/read/28462378/genomics-endoscopy-and-control-of-gastroesophageal-cancers-a-perspective
#8
REVIEW
Brian J Reid
In The Cancer Genome Atlas the goals were to define how to treat advanced cancers with targeted therapy. However, the challenges facing cancer interception for early detection and prevention include length bias in which current screening and surveillance approaches frequently miss rapidly progressing cancers that then present at advanced stages in the clinic with symptoms (underdiagnosis). In contrast, many early detection strategies detect benign conditions that may never progress to cancer during a lifetime, and the patient dies of unrelated causes (overdiagnosis)...
May 2017: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28461760/results-of-adjuvant-radiation-therapy-for-locoregional-perihilar-cholangiocarcinoma-after-curative-intent-resection
#9
Kai-Ming Leng, Yue-Ping Liu, Zhi-Dong Wang, Xiang-Yu Zhong, Guan-Qun Liao, Peng-Cheng Kang, Yun-Fu Cui, Xing-Ming Jiang
PURPOSE: This study sought to define the role of adjuvant radiation therapy (RT) for patients with curative intent resection of perihilar cholangiocarcinoma (pCCA). PATIENTS AND METHODS: By using the Surveillance, Epidemiology and End Results (SEER) registry, 1,917 patients with non-metastatic pCCA who underwent surgical resection from 1988 to 2009 were included in this study. Propensity score methods were used to compare the survival outcomes of patients treated with and without adjuvant RT after controlling for selection bias...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28446259/estimating-the-real-incidence-of-invasive-listeriosis-through-an-integrated-surveillance-model-in-use-in-lombardy-italy-2006-2014
#10
A Zolin, E Amato, M D'Auria, M Gori, P Huedo, A Bossi, M Pontello
The annual incidence of listeriosis in Italy is lower (0·19-0·27 per 100 000 inhabitants per year) than in Europe (0·34-0·52 per 100 000 inhabitants per year). Since the observed incidence of listeriosis may be biased downward for underdiagnosis or under-reporting, this work aims to estimate the real incidence of listeriosis during a 9-year period in the Lombardy region, Italy. Data on listeriosis cases were collected from national mandatory notification system (MAINF) and Laboratory-based Surveillance System (LabSS)...
April 27, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28446198/effect-of-anti-malarial-interventions-on-trends-of-malaria-cases-hospital-admissions-and-deaths-2005-2015-ghana
#11
Maru Aregawi, Keziah L Malm, Mohammed Wahjib, Osae Kofi, Naa-Korkor Allotey, Peprah Nana Yaw, Wilmot Abba-Baffoe, Sylvester Segbaya, Felicia Owusu-Antwi, Abderahmane T Kharchi, Ryan O Williams, Mark Saalfeld, Nibretie Workneh, Estifanos Biru Shargie, Abdisalan M Noor, Constance Bart-Plange
BACKGROUND: Since 2005, the Government of Ghana and its partners, in concerted efforts to control malaria, scaled up the use of artemisinin-based combination therapy (ACT) and insecticide-treated nets (ITNs). Beginning in 2011, a mass campaign of long-lasting insecticidal nets (LLINs) was implemented, targeting all the population. The impact of these interventions on malaria cases, admissions and deaths was assessed using data from district hospitals. METHODS: Records of malaria cases and deaths and availability of ACT in 88 hospitals, as well as at district level, ITN distribution, and indoor residual spraying were reviewed...
April 26, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28445172/telehealth-intensive-care-unit-nurse-surveillance-of-sepsis
#12
Teresa A Rincon, E LaVerne Manos, Janet D Pierce
The purpose of this article is to describe the usability and human factors engineering standards used in development of a sepsis alert known as the sepsis prompt. Sensory processing, cognitive processing, signal detection, criterion response, and user satisfaction were evaluated with controlled user testing and critical incident response techniques. Nurses reported that the sepsis prompt was visible and distinct, making it easily detectable. The prompt provided a clear response mechanism and adequately balanced the number of false alerts with the likelihood of misses...
April 25, 2017: Computers, Informatics, Nursing: CIN
https://www.readbyqxmd.com/read/28431950/postoperative-adjuvant-chemotherapy-is-associated-with-a-lower-incidence-of-colorectal-adenomas-in-patients-with-previous-colorectal-cancer
#13
Hee Seung Lee, Sung Bae Kim, Hyun Jung Lee, Soo Jung Park, Sung Pil Hong, Jae Hee Cheon, Won Ho Kim, Tae Il Kim
BACKGROUND AND AIMS: The effects of chemotherapeutic agents on the development of colorectal adenomas in patients with previous colorectal cancer (CRC) are not defined. Therefore, we evaluated the potential effect of adjuvant chemotherapy on the incidence of colorectal adenomas in patients with previous CRC. METHODS: We selected patients with low-risk stage II CRC with or without postoperative 5-fluorouracil-based adjuvant chemotherapy to reduce selection bias. Among 1808 patients with stage II CRC who underwent colonoscopic surveillance after curative resection of CRC between 2006 and 2013, 192 patients were retrospectively enrolled in this study after matching for age and sex...
April 18, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28425412/surveillance-for-hepatocellular-carcinoma-reduces-mortality-an-inverse-probability-of-treatment-weighted-analysis
#14
Roongruedee Chaiteerakij, Piyanat Chattieng, Jonggi Choi, Nutcha Pinchareon, Kessirin Thanapirom, Nopavut Geratikornsupuk
BACKGROUND: Evidence supporting benefit of hepatocellular carcinoma (HCC) surveillance in reducing mortality is not well-established. The effect of HCC surveillance in reducing mortality was assessed by an inverse probability of treatment weighting (IPTW)-based analysis controlled for inherent bias and confounders in observational studies. MATERIAL AND METHODS: This retrospective cohort study was conducted on 446 patients diagnosed with HCC between 2007 and 2013 at a major referral center...
May 2017: Annals of Hepatology
https://www.readbyqxmd.com/read/28419095/effectiveness-of-a-live-oral-human-rotavirus-vaccine-after-programmatic-introduction-in-bangladesh-a-cluster-randomized-trial
#15
RANDOMIZED CONTROLLED TRIAL
K Zaman, David A Sack, Kathleen M Neuzil, Mohammad Yunus, Lawrence H Moulton, Jonathan D Sugimoto, Jessica A Fleming, Ilias Hossain, Shams El Arifeen, Tasnim Azim, Mustafizur Rahman, Kristen D C Lewis, Andrea J Feller, Firdausi Qadri, M Elizabeth Halloran, Alejandro Cravioto, John C Victor
BACKGROUND: Rotavirus vaccines are now globally recommended by the World Health Organization (WHO), but in early 2009 WHO's Strategic Advisory Group of Experts on Immunization reviewed available data and concluded that there was no evidence for the efficacy or effectiveness of a two-dose schedule of the human rotavirus vaccine (HRV; Rotarix) given early at 6 and 10 wk of age. Additionally, the effectiveness of programmatic rotavirus vaccination, including possible indirect effects, has not been assessed in low-resource populations in Asia...
April 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28413975/the-safety-of-ovarian-preservation-in-stage-i-endometrioid-adenocarcinoma-based-on-propensity-score-matching
#16
Ting Hou, Zhen Wang, Yidi Sun, Chenglin Liu, Junyi Li, Yixue Li
Most patients with early stage endometrioid adenocarcinoma are treated with hysterectomy and bilateral oophorectomy to prevent ovarian metastasis. But this surgical menopause leads to some long-term sequelae for premenopausal women, especially for young women of childbearing age. This population-based study was to evaluate the safety of ovarian preservation in young women with stage I endometrioid adenocarcinoma.Patients of age 50 or younger than 50 with stage I endometrioid adenocarcinoma were explored from the Surveillance, Epidemiology, and End Results program database during 2004 to 2013...
April 17, 2017: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/28404921/circulating-mir-31-as-an-effective-biomarker-for-detection-and-prognosis-of-human-cancer-a-meta-analysis
#17
Yingjun Ma, Yunfang Chen, Jinbo Lin, Yi Liu, Kai Luo, Yong Cao, Tieqiang Wang, Hongwei Jin, Zhan Su, Haolin Wu, Xiaoliang Chen, Jinquan Cheng
PURPOSE: Circulating miR-31 was found to be associated with cancers detection and prognosis. The present meta-analysis aimed to explore the effect of circulating miR-31 on cancer detection and prognosis. METHOD: The studies were accessed using multiple databases. RevMan5.3, Meta-DiSc 1.4, and STATA14.0 were used to estimate the pooled effects, heterogeneity among studies, and publication bias. RESULTS: A total of 14 studies with 1397 cancer patients and 1039 controls were included...
April 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28404010/risk-stratification-of-barrett-s-oesophagus-using-a-non-endoscopic-sampling-method-coupled-with-a-biomarker-panel-a-cohort-study
#18
Caryn S Ross-Innes, Hamza Chettouh, Achilleas Achilleos, Nuria Galeano-Dalmau, Irene Debiram-Beecham, Shona MacRae, Petros Fessas, Elaine Walker, Sibu Varghese, Theodore Evan, Pierre S Lao-Sirieix, Maria O'Donovan, Shalini Malhotra, Marco Novelli, Babett Disep, Phillip V Kaye, Laurence B Lovat, Rehan Haidry, Michael Griffin, Krish Ragunath, Pradeep Bhandari, Adam Haycock, Danielle Morris, Stephen Attwood, Anjan Dhar, Colin Rees, Matt D Rutter, Richard Ostler, Benoit Aigret, Peter D Sasieni, Rebecca C Fitzgerald
BACKGROUND: Barrett's oesophagus predisposes to adenocarcinoma. However, most patients with Barrett's oesophagus will not progress and endoscopic surveillance is invasive, expensive, and fraught by issues of sampling bias and the subjective assessment of dysplasia. We investigated whether a non-endoscopic device, the Cytosponge, could be coupled with clinical and molecular biomarkers to identify a group of patients with low risk of progression suitable for non-endoscopic follow-up. METHODS: In this multicentre cohort study (BEST2), patients with Barrett's oesophagus underwent the Cytosponge test before their surveillance endoscopy...
January 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28401383/gallstone-disease-after-laparoscopic-sleeve-gastrectomy-in-an-asian-population-what-proportion-of-gallstones-actually-becomes-symptomatic
#19
Muhammed Yaser Hasan, Davide Lomanto, Lee Leng Loh, Jimmy Bok Yan So, Asim Shabbir
BACKGROUND: Despite evidence on gallstone disease after laparoscopic sleeve gastrectomy (LSG), there is an existing lack of consensus on practice guidelines, i.e., surveillance and stone-lowering prophylaxis. Available evidence also has a racial bias as western reports predominate current data. Considering the growing popularity of LSG in Asia and the unique Asian anthropometrics, we have attempted to provide a regional perspective by reviewing our LSG database to investigate the epidemiology of this complication...
April 11, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28397261/validity-and-reliability-of-administrative-coded-data-for-the-identification-of-hospital-acquired-infections-an-updated-systematic-review-with-meta-analysis-and-meta-regression-analysis
#20
Olga Redondo-González, José María Tenías, Ángel Arias, Alfredo J Lucendo
OBJECTIVE: To conduct an updated assessment of the validity and reliability of administrative coded data (ACD) in identifying hospital-acquired infections (HAIs). METHODS: We systematically searched three libraries for studies on ACD detecting HAIs compared to manual chart review. Meta-analyses were conducted for prosthetic and nonprosthetic surgical site infections (SSIs), Clostridium difficile infections (CDIs), ventilator-associated pneumonias/events (VAPs/VAEs) and non-VAPs/VAEs, catheter-associated urinary tract infections (CAUTIs), and central venous catheter-related bloodstream infections (CLABSIs)...
April 11, 2017: Health Services Research
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