ArticleEpidemiology and health2018
Incidence of varicella in children in Jeju-do, Korea, 2005-2016: age-period-cohort analysis.
Article in Epidemiology and health, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
3 citing papers in PubMed.
- The comparison of seroconversion rates among different varicella vaccines administered Turkish children; MAV/06 and vOka.Human vaccines & immunotherapeutics · 2021Article
- Recent increase in pertussis incidence in Korea: an age-period-cohort analysis.Epidemiology and health · 2021Article
- Incidence of Scarlet Fever in Children in Jeju Province, Korea, 2002-2016: An Age-period-cohort Analysis.Journal of preventive medicine and public health = Yebang Uihakhoe chi · 2019Article
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Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesAlthough the nationwide inoculation rate of varicella vaccine was approximately 95% in Korean children recently, the number of notified varicella cases is unexpectedly continuously increasing till now. To suggest some hypotheses regarding this discrepancy, an age-period-cohort (APC) analysis as a descriptive epidemiology study was conducted for children residing in Jeju-do, Korea.
methodsThe raw data were obtained from the nationwide database for insurance claim of healthcare fee provided by the National Health Insurance Service, Korea. The selection criteria were children aged 2-13 years who visited any healthcare center due to varicella from 2005 to 2016 while residing in Jeju-do. After calculating the birth cohort-specific crude incidence rates by age and year, the intrinsic estimator method was used to perform the APC analysis.
resultsAs the annual crude incidence rates decreased with increasing age between 2005 and 2016, the age and period effects also decreased. The intrinsic estimator coefficients suggesting the cohort effect shifted from positive to negative in 2011, the starting year of free varicella vaccine program in Jeju-do.
conclusionsThe results suggested that inoculated varicella vaccines have preventive effects. However, further studies to evaluate waning immunity would be needed.
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