3.Application of capture-mark-recapture method on evaluating the abilities of birth defects surveillance systems.
Xun-Qiang YIN ; Ya-Man LI ; Jia-You LUO ; Xiao-Juan SHI ; Ting YIN ; Rui HUANG ; Jing CHEN
Chinese Journal of Epidemiology 2008;29(2):155-157
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
7.Application of capture-recapture method on injury control.
Chinese Journal of Epidemiology 2003;24(9):835-838
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
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