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"Case Definition" And "Electronic Medical Record"

Navjot Kaur, Gia Gumbs, Maria Fontecha, Zeina Khodr, Anna Bukowinski, Kaherine Snell, Susan Farrish, Ava Marie Conlin
INTRODUCTION: The mission of the Department of Defense Birth and Infant Health Registry (Registry) is to conduct ongoing surveillance of birth defects among military families, following the National Birth Defects Prevention Network (NBDPN) case definitions. From 2009 to 2011, a 30% increase in diagnoses of obstructive genitourinary defects (OGDs) was observed in the Registry. To explore the source of this finding, we identified the location with the highest increase and conducted a validation study for OGD cases...
December 0: Journal of Registry Management
Kerry A McBrien, Sepideh Souri, Nicola E Symonds, Azin Rouhi, Brendan C Lethebe, Tyler S Williamson, Stephanie Garies, Richard Birtwhistle, Hude Quan, Gabriel E Fabreau, Paul E Ronksley
Objectives: Data derived from primary care electronic medical records (EMRs) are being used for research and surveillance. Case definitions are required to identify patients with specific conditions in EMR data with a degree of accuracy. The purpose of this study is to identify and provide a summary of case definitions that have been validated in primary care EMR data. Materials and Methods: We searched MEDLINE and Embase (from inception to June 2016) to identify studies that describe case definitions for clinical conditions in EMR data and report on the performance metrics of these definitions...
November 1, 2018: Journal of the American Medical Informatics Association: JAMIA
Taylor Eddens, Daniel J Kaplan, Alyce J M Anderson, Andrew J Nowalk, Brian T Campfield
Background: Lyme disease is the most common reportable zoonotic infection in the United States. Recent data suggests spread of the Ixodes tick vector and increasing incidence of Lyme disease in several states, including Pennsylvania. We sought to determine the clinical presentation and healthcare utilization patterns for pediatric Lyme disease in western Pennsylvania. Methods: The electronic medical records of all patients with an ICD9 diagnosis of Lyme disease between 2003-2013 at Children's Hospital of Pittsburgh were individually reviewed for cases meeting the 2011 CDC case definition for Lyme disease...
June 16, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
Lorraine L Lipscombe, Jeremiah Hwee, Lauren Webster, Baiju R Shah, Gillian L Booth, Karen Tu
BACKGROUND: Health care data allow for the study and surveillance of chronic diseases such as diabetes. The objective of this study was to identify and validate optimal algorithms for diabetes cases within health care administrative databases for different research purposes, populations, and data sources. METHODS: We linked health care administrative databases from Ontario, Canada to a reference standard of primary care electronic medical records (EMRs). We then identified and calculated the performance characteristics of multiple adult diabetes case definitions, using combinations of data sources and time windows...
May 2, 2018: BMC Health Services Research
John A Queenan, Pendar Farahani, Behrouz Ehsani-Moghadam, Richard V Birtwhistle
OBJECTIVES: Herpes zoster (HZ) is a common infection in Canada that can result in serious and long-term complications. People with diabetes may be at an increased risk for HZ. The objectives of this study were to develop and validate a case definition of HZ diagnosis based on electronic medical records; determine a prevalence estimate for HZ in adult patients in the Canadian Primary Care Sentinel Surveillance Network (CPCSSN) and assess the association between HZ and diabetes. METHODS: This was a retrospective cross-sectional study...
October 2018: Canadian Journal of Diabetes
Tyler Williamson, Rebecca C Miyagishima, Janeen D Derochie, Neil Drummond
BACKGROUND: The Canadian Primary Care Sentinel Surveillance Network (CPCSSN) previously carried out a validation study of case definitions for 8 chronic diseases (diabetes mellitus, hypertension, osteoarthritis, depression, dementia, chronic obstructive pulmonary disease, parkinsonism and epilepsy) using direct review of "raw" electronic medical record data. Although effective, this method is time-consuming and can present methodological and organizational challenges. We aimed to determine whether the processed and standardized data contained with the CPCSSN database might function as a reference standard for case definition validation...
December 11, 2017: CMAJ Open
Bushra Khokhar, Hude Quan, Gilaad G Kaplan, Sonia Butalia, Doreen Rabi
Background: The objective of this study was to identify patients with diabetes in a comprehensive primary care electronic medical records database using a number of different case definitions (clinical, pharmacy, laboratory definitions and a combination thereof) and understand the differences in patient populations being captured by each definition. Methods: Data for this population-based retrospective cohort study was obtained from The Health Information Network (THIN)...
September 1, 2018: Journal of Public Health
Aminu K Bello, Paul E Ronksley, Navdeep Tangri, Alexander Singer, Allan Grill, Dorothea Nitsch, John A Queenan, Cliff Lindeman, Boglarka Soos, Elizabeth Freiheit, Delphine Tuot, Dee Mangin, Neil Drummond
INTRODUCTION: Effective chronic disease care is dependent on well-organised quality improvement (QI) strategies that monitor processes of care and outcomes for optimal care delivery. Although healthcare is provincially/territorially structured in Canada, there are national networks such as the Canadian Primary Care Sentinel Surveillance Network (CPCSSN) as important facilitators for national QI-based studies to improve chronic disease care. The goal of our study is to improve the understanding of how patients with chronic kidney disease (CKD) are managed in primary care and the variation across practices and provinces and territories to drive improvements in care delivery...
August 4, 2017: BMJ Open
Sepideh Souri, Nicola E Symonds, Azin Rouhi, Brendan C Lethebe, Stephanie Garies, Paul E Ronksley, Tyler S Williamson, Gabriel E Fabreau, Richard Birtwhistle, Hude Quan, Kerry A McBrien
BACKGROUND: Primary care electronic medical record (EMR) data are being used for research, surveillance, and clinical monitoring. To broaden the reach and usability of EMR data, case definitions must be specified to identify and characterize important chronic conditions. The purpose of this study is to identify all case definitions for a set of chronic conditions that have been tested and validated in primary care EMR and EMR-linked data. This work will provide a reference list of case definitions, together with their performance metrics, and will identify gaps where new case definitions are needed...
February 23, 2017: Systematic Reviews
Toru Ogawa, Maija Kiuru, Thomas H Konia, Maxwell A Fung
BACKGROUND: Acantholytic squamous cell carcinoma (aSCC) is regarded as a high-risk variant of cutaneous squamous cell carcinoma (SCC). Acantholytic actinic keratosis (aAK) has been regarded as a precursor risk factor for aSCC. However, supporting evidence is limited. OBJECTIVE: We sought to document clinical features, histologic features, management, and outcomes in a series of aSCC cases. METHODS: Definitions of aSCC, aAK, and aSCC arising in association with aAK were applied to a consecutive series of aSCC cases...
February 2017: Journal of the American Academy of Dermatology
Andrew J Cave, Christina Davey, Elaheh Ahmadi, Neil Drummond, Sonia Fuentes, Seyyed Mohammad Reza Kazemi-Bajestani, Heather Sharpe, Matt Taylor
An accurate estimation of the prevalence of paediatric asthma in Alberta and elsewhere is hampered by uncertainty regarding disease definition and diagnosis. Electronic medical records (EMRs) provide a rich source of clinical data from primary-care practices that can be used in better understanding the occurrence of the disease. The Canadian Primary Care Sentinel Surveillance Network (CPCSSN) database includes cleaned data extracted from the EMRs of primary-care practitioners. The purpose of the study was to develop and validate a case definition of asthma in children 1-17 who consult family physicians, in order to provide primary-care estimates of childhood asthma in Alberta as accurately as possible...
November 24, 2016: NPJ Primary Care Respiratory Medicine
Christopher Rowe, Eric Vittinghoff, Glenn-Milo Santos, Emily Behar, Caitlin Turner, Phillip O Coffin
OBJECTIVES: Opioid overdose mortality has tripled in the United States since 2000 and opioids are responsible for more than half of all drug overdose deaths, which reached an all-time high in 2014. Opioid overdoses resulting in death, however, represent only a small fraction of all opioid overdose events and efforts to improve surveillance of this public health problem should include tracking nonfatal overdose events. International Classification of Disease (ICD) diagnosis codes, increasingly used for the surveillance of nonfatal drug overdose events, have not been rigorously assessed for validity in capturing overdose events...
April 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
Neil Drummond, Richard Birtwhistle, Tyler Williamson, Shahriar Khan, Stephanie Garies, Frank Molnar
BACKGROUND: The proportion of Canadians living with Alzheimer disease and related dementias is projected to rise, with an increased burden on the primary health care system in particular. Our objective was to describe the prevalence and management of dementia in a community-dwelling sample using electronic medical record (EMR) data from the Canadian Primary Care Sentinel Surveillance Network (CPCSSN), which consists of validated, national, point-of-care data from primary care practices...
April 2016: CMAJ Open
Audrey Flak Pennington, Matthew J Strickland, Karen A Freedle, Mitchel Klein, Carolyn Drews-Botsch, Craig Hansen, Lyndsey A Darrow
BACKGROUND: Case definitions for asthma incidence in early life vary between studies using medical records to define disease. This study assessed the impact of different approaches to using medical records on estimates of asthma incidence by age 3 and determined the validity of early-life asthma case definitions in predicting school-age asthma. METHODS: Asthma diagnoses and medications by age 3 were used to classify 7103 children enrolled in Kaiser Permanente Georgia according to 14 definitions of asthma...
September 2016: Pediatric Allergy and Immunology
Mingkai Peng, Guanmin Chen, Gilaad G Kaplan, Lisa M Lix, Neil Drummond, Kelsey Lucyk, Stephanie Garies, Mark Lowerison, Samuel Weibe, Hude Quan
BACKGROUND: Electronic medical records (EMR) can be a cost-effective source for hypertension surveillance. However, diagnosis of hypertension in EMR is commonly under-coded and warrants the needs to review blood pressure and antihypertensive drugs for hypertension case identification. METHODS: We included all the patients actively registered in The Health Improvement Network (THIN) database, UK, on 31 December 2011. Three case definitions using diagnosis code, antihypertensive drug prescriptions and abnormal blood pressure, respectively, were used to identify hypertension patients...
September 2016: Journal of Public Health
Catherine R Bateman-Steel, Elizabeth J Smedley, Marlene Kong, Mark J Ferson
AIM: Hepatitis C virus (HCV) is a potentially serious bloodborne virus, which persists in the majority of those infected. Long-term sequelae include liver cirrhosis, liver cancer and premature death. Early identification of newly acquired infection is important for protection of public health. Routine surveillance based on laboratory notification of HCV infection is not sufficient to differentiate between newly acquired and chronic infections. Enhanced surveillance systems have been trialled globally in a number of settings...
March 30, 2015: Public Health Research & Practice
Shital C Shah, Dino P Rumoro, Marilyn M Hallock, Gordon M Trenholme, Gillian S Gibbs, Julio C Silva, Michael J Waddell
OBJECTIVE: To identify clinical signs and symptoms (ie, "terms") that accurately predict laboratory-confirmed influenza cases and thereafter generate and evaluate various influenza-like illness (ILI) case definitions for detecting influenza. A secondary objective explored whether surveillance of data beyond the chief complaint improves the accuracy of predicting influenza. DESIGN: Retrospective, cross-sectional study. SETTING: Large urban academic medical center hospital...
March 2015: Infection Control and Hospital Epidemiology
Nathan Coleman, Gayle Halas, William Peeler, Natalie Casaclang, Tyler Williamson, Alan Katz
BACKGROUND: Electronic Medical Records (EMRs) are increasingly used in the provision of primary care and have been compiled into databases which can be utilized for surveillance, research and informing practice. The primary purpose of these records is for the provision of individual patient care; validation and examination of underlying limitations is crucial for use for research and data quality improvement. This study examines and describes the validity of chronic disease case definition algorithms and factors affecting data quality in a primary care EMR database...
2015: BMC Family Practice
R Michele Anholt, John Berezowski, Carl S Ribble, Margaret L Russell, Craig Stephen
Antimicrobial drugs may be used to treat diarrheal illness in companion animals. It is important to monitor antimicrobial use to better understand trends and patterns in antimicrobial resistance. There is no monitoring of antimicrobial use in companion animals in Canada. To explore how the use of electronic medical records could contribute to the ongoing, systematic collection of antimicrobial use data in companion animals, anonymized electronic medical records were extracted from 12 participating companion animal practices and warehoused at the University of Calgary...
2014: PloS One
Allison L Naleway, Sheila Weinmann, Brad Crane, Julianne Gee, Lauri E Markowitz, Eileen F Dunne
BACKGROUND: Most studies of anogenital wart (AGW) epidemiology have used large clinical or administrative databases and unconfirmed case definitions based on combinations of diagnosis and procedure codes. METHODS: We developed and validated an AGW case definition using a combination of diagnosis codes and other information available in the electronic medical record (provider type, laboratory testing). We calculated the positive predictive value (PPV) of this case definition compared with manual medical record review in a random sample of 250 cases...
August 2014: Sexually Transmitted Diseases
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