Epidemiologic Methods ; Humans ; Population Surveillance ; Public Health

Comet Assay ; DNA Damage ; Humans ; Occupational Exposure ; Population Surveillance ; methods

Chronic Disease ; prevention & control ; Humans ; Population Surveillance ; methods

China ; Disease Notification ; Online Systems ; Population Surveillance ; methods ; Quality Control

OBJECTIVETo explore relationships among several capture-recapture methods to be used in injury studies.

METHODSComparing the method on the estimation number of missed cases with supergeometric distribution and proportional methods and study the relationship between the three methods.

RESULTSResults from estimation method for number of missed cases and supergeometric distribution were identical while the formula of estimation method for number of missed cases could be induced from one of supergeometric distribution formula. The distribution of injured population did not belong to the negative binomial distribution. The estimation range was not the same between proportional method and supergeometric distribution.

CONCLUSIONSEither supergeometric distribution or estimation method for number of missed cases could be chosen, but the former was simple in calculation. Considering the estimating range was not the same between supergeometric distribution and proportional method, conditions for application must be considered during implementation.

Epidemiologic Methods ; Humans ; Population Surveillance ; Wounds and Injuries ; prevention & control

Communicable Diseases ; epidemiology ; Disease Outbreaks ; Humans ; Population Surveillance ; methods

HIV Infections ; epidemiology ; Humans ; Population Surveillance ; methods ; World Health Organization

OBJECTIVETo evaluate the abilities of population-based birth defects surveillance system (PBBDSS) and hospital-based birth defects surveillance system(HBBDSS).

METHODSWe used capture-mark-recapture method(CMR) to analyze the data of the two kinds of birth defects surveillance systems from 1 Oct. 2006 to 31 Dec. 2006 in a county of Hunan province. Data from PBBDSS were defined as the first source and data from HBBDSS were defined as the second source.

RESULTS49 and 28 birth defect cases were found from PBBDSS and from HBBDSS respectively. Among these cases, 20 were marked. With the method of CMR, the estimated birth defects cases were 68 (95% CI: 56-70). The coincident rates of PBBDSS and HBBDSS were 72.1% and 41.2%, while the total coincident rates was 83.8% and the coincident rates from different sources was 57.1%. The unreported rates of PBBDSS and HBBDSS were 27.9% and 58.8%.

CONCLUSIONNot only the HBBDSS but also the PBBDSS appeared to have had high unreported rates, suggesting that we could use CMR to adjust the rate of birth defects from the birth defects surveillance data.

Congenital Abnormalities ; diagnosis ; epidemiology ; Humans ; Infant, Newborn ; Population Surveillance ; methods

Population-based lifetime health services rely on health management practice. Collection, management and analysis of big data are highly suitable for the huge population base in China. Nowadays, more and more research focus on the methods, security and ethnicity of health management and big data, and a plenty of instructive results have been made, which could be used to guide the future practice and development. Yichang mode has set a precedent for construction and use of big data for health management.
Big Data ; China ; Delivery of Health Care ; Health Services Research ; Population Health Management ; Population Surveillance/methods*

OBJECTIVETo describe the experience of the China CDC in rebuilding reporting capacity and response to the Sichuan earthquake through use of mobile phones.

METHODSSoftware engineering and business modeling are used to design and develop a cell phone-based reporting system. The PDA-based system used by the Field Adapted Survey Toolkit (FAST) was deployed

RESULTSApproximately one week after deployment of the mobile phone-based reporting system, the cumulative reporting rate reached the same level (81%) as the same period in 2007. In the Sichuan provincial pilot investigation for infectious disease, 1339 records were collected using PDAs developed and deployed by FAST.

CONCLUSIONThe mobile-based system is recognized as a quick and effective response solution to this public health challenge. Our experience suggests that mobile-based data collection tools provide faster, cleaner, standardized, and shareable data for critical decision making. This system could be adapted as complementary to national infectious disease reporting systems after natural disaster occurrences.

Cell Phone ; China ; Communicable Diseases ; epidemiology ; Disease Notification ; methods ; Earthquakes ; Emergencies ; Humans ; Population Surveillance ; methods