THE USE OF CAPTURE–RECAPTURE METHODOLOGY IN EPIDEMIOLOGICAL SURVEILLANCE AND ECOLOGICAL SURVEYS

2015 ◽  
pp. 425-467
Author(s):  
ANNE CHAO ◽  
T. C. HSIEH ◽  
HSIN-CHOU YANG
Keyword(s):  
Epidemiological Surveillance ◽  
Capture Recapture

Size of the Adult HIV-Infected Population Adjusted for the Unreported AIDS Mortality in the Santa Catarina State, Brazil, 2008-2017

2019 ◽  
Vol 17 (4) ◽  
pp. 277-289
Author(s):  
Larissa Hermes Thomas Tombini ◽  
Emil Kupek
Keyword(s):  
Record Linkage ◽  
Epidemiological Surveillance ◽  
Published Data ◽  
Hiv Viral Load ◽  
Santa Catarina ◽  
Capture Recapture ◽  
Log Linear ◽  
Old Men ◽  
Santa Catarina State ◽  
Hiv Aids

Objective: To estimate the number of 15-79-year-old individuals infected with HIV in the Santa Catarina state, Brazil, during the period 2008-2017. Methods: Three official registers of the HIV-infected individuals were compiled: SINAN for the HIV/AIDS epidemiological surveillance, SIM for mortality and SISCEL for the HIV viral load and CD4/CD8 cell count. Their records were linked by a unique personal identifier. Capture-recapture estimates were obtained by log-linear modelling with both the main effects and interaction between the registers, adjusted for age, sex and period. An adjustment for underreporting of AIDS-related deaths used published data on ill-defined causes of death and AIDS mortality. Results: After data sorting, 67340 HIV/AIDS records were identified: 29734 (44.2%) by SINAN, 5540 (8.2%) by SIM and 32066 (47.6%) by SISCEL. After record linkage, the HIV population size was estimated at 45707, whereas the capture-recapture method added 44 individuals. The number of new HIV/AIDS notifications per year increased significantly in 2014-2017 compared to the period 2011-2013 among 15-34-year-old men and less so for older men and women. Including 1512 unreported AIDS-related deaths gave an estimated 47263 HIV-infected individuals with 95% confidence interval (CI) of 47245-47282 and corresponding incidence of 93 (95% CI 91-96) p/100000. Case ascertainment of 62.9%, 78.5% and 67.8% was estimated for SINAN, SIM and SISCEL, respectively. Conclusion: Three major HIV/AIDS registers in Brazil showed significant under-notification of the HIV/AIDS epidemiological surveillance amenable to significant improvement by routine record linkage.

Capture-recapture study to estimate the true incidence of tuberculosis in Portugal, 2018

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
M Perez Duque ◽  
L Hansen ◽  
D Antunes ◽  
R Sá Machado
Keyword(s):  
Infectious Disease ◽  
Linear Model ◽  
Surveillance System ◽  
Epidemiological Surveillance ◽  
Accurate Estimation ◽  
Surveillance Systems ◽  
True Incidence ◽  
True Number ◽  
Capture Recapture ◽  
Log Linear

Abstract Accurate estimation of the true number of cases of an infectious disease is essential to plan and efficiently allocate available resources. This study aims to improve the Portuguese surveillance system for tuberculosis (TB) by identifying gaps in TB epidemiological surveillance at the national level. We estimated annual TB incidence using a capture-recapture method to assess the sensitivity of national TB surveillance. Using probabilistic record linkage between two data sources, the National Epidemiological Surveillance System (SINAVE) and National Tuberculosis Program Surveillance System (SVIG-TB), we extracted TB diagnosed cases data for calendar year 2018. All reported TB cases were included, classified as confirmed, probable or possible. A two-source capture-recapture analysis using a log-linear model was performed to estimate the number of unobserved TB cases in Portugal and of the proportion identified by the current TB surveillance system. Between the two datasets, we found 896 TB cases (of a total of 2170 cases) that could not be matched (37.5% SINAVE only, 62.5% SVIG only). Based on the log-linear model, it was estimated that there were 148 unobserved TB cases (95% confidence interval 127.96 - 171.31). Therefore, the estimated true number of TB cases in 2018 is 2318, so current surveillance has a sensitivity of 93.6%. Based on these findings, the TB incidence in Portugal is estimated to be 22.55 cases per 100 000 inhabitants. Capture-recapture methods are useful in estimating annual TB incidence in high-resource settings. Although the two TB surveillance systems capture the majority of TB cases in Portugal, we might still be underestimating the true number of TB cases. Because TB is a high impact infectious disease, precise incidence estimates are crucial to allocate treatment and prevention resources and guide health policies. Key messages CRC method showed that Portugal is a TB low incidence country. Epidemiological surveillance systems should have a high sensitivity in order to allocate efficiently resources available.

Capture recapture électroniques en phosphorescence

1952 ◽  
Vol 12 (7) ◽  
pp. 749-801 ◽  
Author(s):  
Daniel Curie
Keyword(s):  
Capture Recapture

Developing GIS portal to ensure sanitary and epidemiological surveillance of transferring radio engineering objects

2020 ◽  
Vol 99 (4) ◽  
pp. 344-350
Author(s):  
Evgeny V. Zibarev ◽  
A. S. Afanasev ◽  
O. V. Slusareva ◽  
T. I. Muragimov ◽  
V. A. Stepanets ◽  
...  
Keyword(s):  
Electromagnetic Fields ◽  
Analytical Data ◽  
Base Stations ◽  
Epidemiological Surveillance ◽  
Graphical Form ◽  
Residential Areas ◽  
Information Portal ◽  
Radiofrequency Electromagnetic Fields ◽  
Online Mode ◽  
Automated Processes

In recent years, in the Russian Federation there has been an increase in the levels of radiofrequency electromagnetic fields in residential areas, including due to an increase in the number of base stations (BS). The purpose of sanitary and epidemiological surveillance at the stages of placement and commissioning of base stations (BS) is to prevent their adverse effects on public health. The increase in the number of base stations, together with the advent of new electronic equipment and antennas, provide opportunities for improving the processes of their accounting at the stage of placement and monitoring of the levels of radiofrequency electromagnetic fields at the operation stage. This automation tool can be a geo-information portal for providing sanitary and epidemiological surveillance of cellular base stations. The prototype of the geo-information portal allows both calculating the size of sanitary protection zones (SPZ) and building restriction zones (RZ) from the BS in online mode, displaying the results of calculations in graphical form and issuing sanitary and epidemiological conclusions for the placement and operation of base stations. The geo-information portal has the ability to synchronize with the data of the radio frequency center. Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing will be able to receive up-to-date analytical data. There will be completely automated processes of collecting, processing and storing information on BS.

ON THE NEED TO SYNCHRONIZE RULES AND METHODS OF RESEARCH OF SAFETY INDICATORS OF NON-FOOD PRODUCTS IN ACCORDANCE WITH THE REQUIREMENTS OF THE TECHNICAL REGULATIONS OF THE CUSTOMS UNION

2018 ◽  
pp. 39-42
Author(s):  
M.I. Chubirko ◽  
O.V. Klepikov ◽  
G.P. Dubova ◽  
E.M. Studenikina
Keyword(s):  
Food Products ◽  
Measurement Methods ◽  
Epidemiological Surveillance ◽  
Customs Union ◽  
Objective Data ◽  
Safety Index ◽  
Formaldehyde In Air ◽  
Technical Regulations

The article considers problematic practical moments of compliance with the rules and methods of research of safety indicators of non-food products in accordance with the requirements of the Technical Regulations of the Customs Union. The authors give examples of the inconsistency of the measurement procedures presented in the lists, indicated in the lists of various technical regulations for the study of non-food products, directly affects the work of laboratories and limits their ability to conduct research. Using the example of methods for determining the concentration of formaldehyde in air extracts indicated in different technical regulations for non-food products, it is shown that in practice there are situations when the same safety index for different groups of goods is investigated according to different measurement methods. It has been shown that until now in the lists of documents in the field of standardization, containing rules and methods of research (testing) and measurements, there are methods that do not meet the sensitivity requirements specified in the same technical regulations, as well as certain documents that have become invalid. Proposals on synchronization of rules and methods for researching the safety indicators of non-food products for timely provision of sanitary and epidemiological surveillance with objective data on valid up-to-date documents have been developed.

An Urn Model for the Multi-Sample Capture/Recapture Sequential Tagging Process.

1987 ◽  
Author(s):  
Jose G. Leite ◽  
Carlos A. De Braganca Pereira
Keyword(s):  
Urn Model ◽  
Capture Recapture

Estimating the population size of people who inject drugs in Ho Chi Minh City, Vietnam: A two-survey capture-recapture exercise (Preprint)

2019 ◽  
Author(s):  
Abu Abdul-Quader
Keyword(s):  
Population Size ◽  
Illicit Drugs ◽  
People Who Inject Drugs ◽  
Care Service ◽  
Ho Chi Minh City ◽  
Size Estimation ◽  
Population Size Estimates ◽  
Capture Recapture ◽  
The City ◽  
Size Estimates

BACKGROUND Population size estimation of people who inject drugs (PWID) in Ho Chi Minh City (HCMC), Vietnam relied on the UNAIDS Estimation and Projection Package and reports from the city police department. The two estimates vary widely. OBJECTIVE To estimate the population size of people who inject drugs in Ho Chi Minh City, Vietnam METHODS Using Respondent-driven sampling (RDS), we implemented two-source capture-recapture method to estimate the population size of PWID in HCMC in 2017 in 7 out of 24 districts. The study included men or women aged at least 18 years who reported injecting illicit drugs in the last 90 days and who had lived in the city the past six months. We calculated two sets of size estimates, the first assumed that all participants in each survey round resided in the district where the survey was conducted, the second, used the district of residence as reported by the participant. District estimates were summed to obtain an aggregate estimate for the seven districts. To calculate the city total, we weighted the population size estimates for each district by the inverse of the stratum specific sampling probabilities. RESULTS The first estimate resulted in a population size of 19,155 (95% CI: 17,006–25,039). The second one generated a smaller population size estimate of 12,867 (95% CI: 11,312–17,393). CONCLUSIONS The two-survey capture-recapture exercise provided two disparate estimates of PWID in HCMC. For planning HIV prevention and care service needs among PWID in HCMC, both estimates may need to be taken into consideration together with size estimates from other sources.

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