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PubMed2006

A comparison of data sources for the surveillance of seasonal and pandemic influenza in Victoria.

Understanding the characteristics of available influenza or influenza-like illness (ILI) surveillance systems is important for seasonal influenza surveillance and pandemic preparedness. We compared five influenza or ILI data sources in Victoria: notifications of laboratory-confirmed influenza to the Victorian Department of Human Services; hospital emergency presentations and hospital admissions; sentinel general practitioner surveillance; and medical locum service surveillance. Seasonal trends for influenza and ILI activity were similar for all data sources. Community ILI surveillance, operating as sentinel GP, locum service or hospital emergency department surveillance, in conjunction with notification of laboratory-confirmed influenza, would provide adequate inter-pandemic surveillance for influenza in Victoria and, by extension, in any Australian jurisdiction. Other surveillance systems would be needed for early pandemic case or cluster detection, while pandemic monitoring would be better achieved by a more automated system.

Adolescent↗
PubMedDate not supplied

Combining registry, primary, and secondary data sources to identify the impact of cancer on labor market outcomes.

Some cancers are rapidly becoming chronic conditions that are more and more often diagnosed in working-age individuals. The authors developed a research agenda to study the labor market outcomes attributable to detection and treatment for cancer, and research design and data collection strategies to improve upon other research on these questions. In this article, they describe their approach to combining secondary data sources, primary data collection, and cancer registry data to evaluate the impact cancer has on labor market outcomes such as employment, hours worked, wages, and health insurance. They then critically assess how well their study design and data collection strategy accomplished its objectives. The intention is to offer guidance on how researchers, who are interested in the economic consequences of cancer, as well as of other chronic conditions, might develop and execute studies that examine labor market outcomes. As more attention is placed on the economic aspects of disease, the methods used to estimate productivity loss and other economic outcomes attributable to these conditions require careful scrutiny so that reliable findings can be used to shape health care decisions and policy.

Breast Neoplasms↗
PubMed2006

Invasive meningococcal disease in Austria 2002: assessment of completeness of notification by comparison of two independent data sources.

AIM OF THE STUDY: The notified incidence of meningococcal disease in European countries varies from <1 case per 100,000 inhabitants to approximately 7 cases per 100,000. Assessing the true burden of disease is important for setting priorities in health services and for estimating the benefit of interventions such as vaccination. Completeness and timeliness of reporting is also essential for the early recognition of outbreaks. The objective of this study was to assess the completeness of surveillance data on invasive meningococcal disease in Austria at the National Reference Center for Meningococci for the year 2002. METHODS: The data stored at the reference center was compared with an independent database containing the main diagnosis documented in the obligatory hospital discharge dataset of all Austrian hospitals (coded in ICD-10 since 2001). All mismatches were reviewed in order to exclude possible errors and identify true cases of meningococcal disease that had not been reported to the reference center. The number of cases not recorded by either data source was estimated using the capture-recapture method. RESULTS: The first comparison of the two data sources identified 50 cases not registered at the national reference center. Screening of the ICD codes from these 50 patients through the hospitals reduced the number of under-reported cases to 10, of which 6 showed symptoms compatible with meningococcal disease, although microbiological confirmation was missing. Re-evaluation of the case histories of these 6 patients by a clinical expert for meningococcal disease identified them as probable cases. The main reason for correction of the diagnosis in 27 cases was an obvious coding error: these patients had been treated in hospitals for illnesses not related to meningococcal disease. In 72 cases, the two databases were in agreement. Eleven cases of meningococcal disease were notified solely to the national reference center. Addition of the newly recognized cases of invasive meningococcal disease increased the total number of cases from 83 (incidence, 1.03/100,000) to 93 (incidence, 1.16/100,000). Estimation of the "true" number of cases of meningococcal disease, using the capture-recapture method, gave a final total of 95 cases (95% CI, 93-98) and an incidence of 1.18/100,000. The completeness (sensitivity) of the original notification at the national reference center was therefore 87.4% (83 of 95 cases). CONCLUSION: All probable cases of meningococcal disease, even those (still) lacking microbiological confirmation, should be reported to the public health authorities as soon as possible, in order to ensure the necessary prompt prophylactic action (e.g., chemoprophylaxis).

Austria↗
PubMed1997

Estimating the economic costs of the abuse of tobacco, alcohol and illicit drugs: a review of methodologies and Canadian data sources.

The study of economic costs of substance abuse, namely, abuse of tobacco, alcohol and illicit drugs, can provide important information for setting good public health policies. This review paper provides a list of previous cost studies of substance abuse, compares the cost categories considered by various methodologies and describes an inventory of data sources for obtaining relevant information for cost studies. Investigators will find this paper useful as an introduction to the literature in this area, for designing a list of cost categories to consider in a particular study and for identifying relevant data sources.

Alcoholism↗
PubMed1986

Data sources for accident modelling.

The value of modelling for the study of accidents and for devising and assessing methods of prevention depends on the reliability of data sources. Police statistics are commonly used for accidents which cause death or injury. Several studies, however, show their deficiencies particularly for injury accidents of pedestrians and pedal cyclists. Hospital records give better information on injuries and diagnostic classification by the ICD code can be usefully improved by inclusion of the "E" (circumstance) detail. Insurance data can provide another source which is likely to be best for accidents involving multiple vehicles and damage to the property of third parties. The special "no fault" compensation system in New Zealand gives an unusually full source of data suitable for statistical analysis of accidents.

Accidents, Traffic↗
PubMed2005

Early detection of rotavirus gastrointestinal illness outbreaks by multiple data sources and detection algorithms at a pediatric health system.

Using data from over 450,000 pediatric encounters three data sources were evaluated for their ability to support early detection of a yearly outbreak of rotavirus disease: 1) Laboratory studies ordered, 2) Diagnosis codes, and 3) Free text "reason for visit" strings categorized as Gastrointestinal syndrome by a support vector machine software classifier. We found that in this setting the categorized free text analyzed through simple control charts detected each outbreak within 10 days of their beginning as determined by laboratory detection of rotavirus antigen (the gold standard). Outbreak detection by laboratory studies was delayed an average of 14 days and by diagnosis codes by an average of 20 days. We conclude that categorized text may provide a valuable basis for real-time detection of disease outbreaks.

Algorithms↗
PubMed2000

Improving surveillance of intimate partner violence by use of multiple data sources.

BACKGROUND: Intimate partner violence (IPV) is a significant public health problem in the United States. Estimates of incidence and prevalence vary widely, depending on the data source used. Combining information from different sources can enhance our understanding of IPV. METHODS: In this paper, we used 1998 data from the Rhode Island (RI) Department of Health Violence Against Women Public Health Surveillance System to describe the prevalence of IPV reported to police, the demographic characteristics and help-seeking efforts of women reporting IPV, and characteristics of IPV incidents. We used data from the 1998 RI Department of Health Behavioral Risk Factor Surveillance System survey to examine associations between health care use and health outcomes of victims and nonvictims of IPV, and to explore the correlates of IPV. We also discuss the use of both narrow and broad definitions of IPV. RESULTS: Our findings show that the definition of IPV and the source used to identify IPV victims can produce a markedly different picture of IPV victims, and that combining information from different data sources can enhance our understanding of IPV. An important finding for health care providers is that IPV victims do not appear to be significantly different from nonvictims in their access to and utilization of routine health care, and that more than 60% of victims at highest risk for injury reported seeing a health care provider because of IPV. CONCLUSIONS: Our findings underscore the importance of health care providers addressing IPV and its consequences among their patients.

Adolescent↗
PubMed1992

Reliability of data sources for poisoning deaths in Massachusetts.

The authors analyzed poisoning-related deaths in Massachusetts from 1986 and 1987 recorded in three datasets: poison center records, death certificate, and state medical examiner's office records. While 714 such deaths were found, 551 of these were prehospital deaths recorded within the medical examiner's office but not by the poison center. The poison center was not consulted in over 47% of the poisoning deaths occurring in Massachusetts hospitals. Conversely, 15% of deaths were reported to the poison center but were not found either in death certificate or medical examiner records. Concordance between all three datasets for recording the 163 poisoning-related hospital deaths was only 17%. The authors conclude that reliance on a single data source underestimates and potentially misrepresents both the numbers and types of poisoning deaths occurring in the state. They also believe the files of the medical examiner are an underappreciated, rich source of data concerning out-of-hospital deaths due to poisonings and intoxications. Their findings suggest that the regional poison center is an underused resource for the management of seriously poisoned patients. There is a need for a better working relationship between poison centers and area hospitals so that all serious intoxications and poisonings are reported to the poison center in a timely fashion.

Carbon Monoxide Poisoning↗
PubMed1987

Occupational disease surveillance data sources, 1985.

Health department epidemiologists in 50 states, New York City, and the District of Columbia were surveyed in 1985 about seven potential data sources for occupational disease surveillance. Reported sources of occupational disease data were: automated workers' compensation claims (63 per cent of the 52 respondents); provider reports (62 per cent); death certificates with occupation or industry (60 per cent); cancer registries with occupational histories (35 per cent); birth certificates with parent's occupation (27 per cent); non-cancer disease registries (13 per cent); and hospital or insurance records (8 per cent).

Birth Certificates↗
PubMed2006

Geoacoustic inversion of short range source data using a plane wave reflection coefficient approach.

Acoustic time series data were collected in a shallow, hard bottom lake environment located in central Texas using both short range (2 m) implosive data, obtained with the source and a single hydrophone located near mid-depth in the waveguide, along with longer range implosive and explosive data from a near surface source to a bottom mounted hydrophone. Matched field inversions using simulated annealing were performed with a ray trace plus complex plane wave reflection coefficient forward propagation model that was validated in previous work. Isolating bottom interacting paths to perform the inversions is shown to be essential to reduce parameter uncertainties in the hard bottom environment and enables a systematic approach to the inversions which establishes the number of layers needed to represent the lake environment. Measured transmission loss data from a towed source were compared through a RMS error analysis to modeled transmission loss, constructed with the parameters from inversions of data from several source types, to further establish the validity of the inversion approach for this environment. Geoacoustic parameters obtained by inversions of short range, low frequency impulsive data are used to predict transmission loss at longer ranges and higher frequencies. The range dependence of the global minimum is discussed.

Acoustics↗
PubMed2002

Data requirements and data sources for biodiversity priority area selection.

The data needed to prioritize areas for biodiversity protection are records of biodiversity features - species, species assemblages, environmental classes - for each candidate area. Prioritizing areas means comparing candidate areas, so the data used to make such comparisons should be comparable in quality and quantity. Potential sources of suitable data include museums, herbariums and natural resource management agencies. Issues of data precision, accuracy and sampling bias in data sets from such sources are discussed and methods for treating data to minimize bias are reviewed.

Animals↗
PubMed1995

Ethnic minority groups in regional and local labour markets in Britain: a review of data sources and associated issues.

"This paper outlines the context of, and discusses the need for, local information on the demographic patterns and labour market experience of ethnic minority groups in many parts of Britain. The specific focus is on the identification and assessment of the strengths and weaknesses of particular data sources providing spatially disaggregated information on the economic position of ethnic minority groups."

Culture↗
PubMed2006

Evaluation of five data sources for inclusion in a statewide tracking system for accidental carbon monoxide poisonings.

All accidental carbon monoxide poisoning should be preventable. Yet despite intervention efforts including promotion of inexpensive home carbon monoxide detectors, annual inspection of home gas and oil appliances, and general awareness campaigns, in 2002 there were 18 fatalities, 36 inpatient admissions, 351 emergency department visits and 117 poison center calls attributed to acute carbon monoxide exposure. The first step to help better focus public health interventions is adequate information on occurrences. The Wisconsin Environmental Public Health Tracking program identified and evaluated potential data sources for inclusion in a surveillance system for monitoring unintentional carbon monoxide poisonings. Criteria to evaluate the utility of the existing data systems were developed and included the number of new cases identified from that source, the circumstantial detail provided, timeliness of data availability, confidence that an actual exposure occurred, and the resources required to retrieve and summarize the data. Five candidate datasets were evaluated: emergency department visits, hospital inpatient stays, death certificates, Wisconsin Poison Center records, and newspaper reports. It was found that although there was some overlap between cases reported in the different datasets, each source provided unique cases. The sources also differed in the resources required for utilizing the data and the amount of circumstantial information provided. Based on the evaluation of the different sources, it was concluded that newspaper reports should not be included, but the other 4 data sources would each contribute substantially to establishing a comprehensive surveillance system for accidental carbon monoxide poisoning.

Accidents↗
PubMed2006

Disparities between two common data sources on hospital nurse staffing.

PURPOSE: To compare nurse staffing measures derived from two widely used data sources: the American Hospital Association (AHA) Annual Survey of Hospitals and the California Office for Statewide Health Planning and Development (OSHPD). DESIGN: Descriptive cross-sectional study with measures of nurse staffing level and skill mix constructed from each database for 372 nonfederal, acute care hospitals in California. METHODS: Discrepancies in nurse staffing estimates between the two databases were examined. Relationships of nurse staffing with risk-adjusted patient outcomes (decubitus ulcer, failure to rescue, and mortality) were assessed through multivariate analyses and compared for nursing measures derived from the two databases. FINDINGS: For small, rural, or nonteaching hospitals, AHA reported substantially higher registered nurse (RN) hours per patient day than did OSHPD. RN proportion among licensed nurses matched most closely in the two databases. RN hours per patient day derived from both databases showed significant inverse relationships with decubitus ulcer and mortality, and the association was stronger for the measure based on the OSHPD data. RN proportion derived from the OSHPD data was significantly associated with all three patient outcomes, but the AHA measure had a significant relationship only with decubitus ulcer. CONCLUSIONS: Compared with the AHA survey, the OSHPD data on hospital nurse staffing appear to be more complete and also were more closely associated with patient outcomes. Efforts to refine the AHA survey as a national database for nurse staffing will significantly enhance the capacity for monitoring nurse workforce and its effect on quality of care.

American Hospital Association↗
PubMed1976

The essentials of data sources in eye epidemiology.

The extensive literature on eye epidemiology was selectively reviewed to provide a concise and comprehensive summary on the current status of available data sources. The topics being covered were epidemiologic data evaluation, data handling, card registration, computer analysis, geographic factors, socio-economic conditions, personal attributes, genetic backgrounds, twin analysis and laboratory procedures for host defense factors including humoral and cellular immunity. Also, the scope of this article encompassed such major practical issues as glaucoma, cataract and other blinding diseases as well as traffic and occupational hazards. Epidemiologic information thus obtainable through data searching may prove tobe instrumental in the identification of any potential preventive measures in ophthalmology and public health.

Data Display↗
PubMed2005

Transplant data: sources, collection and research considerations, 2004.

The process of collecting and analyzing transplant data is complex. Familiarity with how these data are collected is crucial to a thorough understanding of the information. This article focuses on available OPTN-SRTR data and the continuing evolution of data collection mechanisms; how that data collection system is improving the data quality and reducing the data collection burden; how additional ascertainment of outcomes both completes and validates existing data; and caveats that remain for researchers. This year's article focuses further on research considerations related to cohort choice, timing of data submission, and potential biases in follow-up data. Ongoing improvements in data collection timeliness and scope are covered. The impact of extra ascertainment of outcomes, particularly for post-transplant kidney graft failure from Medicare data, are also examined. A section on graft failure reporting among different sources traces the steps by which the SRTR reconciles different data sources in its analyses. It is important that those reading and conducting transplant research understand the origin, structure, and scope of the available data. All of these issues should be carefully considered when choosing cohorts and data sources for analysis.

Graft Survival↗
PubMed1995

Data sources for aging research on racial and ethnic groups.

This article reports the results of a survey of recent and ongoing aging-related data sources supported by U.S. federal agencies. The survey sought to obtain data on the sample sizes and topics covered within the data sets maintained and frequently used by the various federal agencies engaged in data collection and/or analysis. The objective of the study was to determine the suitability of these data sets to conduct research on minority elders. Formal tests of the adequacy of data set sample sizes to support analysis on various minority groups were performed. Each data set was found to be large enough to conduct research on white elders, and a majority of the data sets were large enough for research on African American elders. However, Hispanics, American Indians, Alaska Natives, Asian Americans, and Pacific Islanders were rarely included in sufficient numbers.

Aged↗