J Med Life Sci > Volume 15(2); 2018 > Article
Journal of Medicine and Life Science 2018;15(2):84-88.
DOI: https://doi.org/10.22730/jmls.2018.15.2.84    Published online January 3, 2019.
연령표준화 발생률을 이용한 지역별 연도별 감염병 발생 수준 비교: 2011-2016년 제주도 쯔쯔가무시 발생 신고자료
,
Comparison of Age-Standardized Incidence Rates by Places and Times: Reported Cases of Scrub Typhus in Jeju-do, 2011-2016
Eun Hee Kim, Jong-Myon Bae
Department of Preventive Medicine, Jeju National University Scool of Medicine, Jeju-do, Korea
Correspondence:  Jong-Myon Bae, Email: jmbae@jejunu.ac.kr
Abstract
Objectives
The aim was to evaluate different results from using crude incidence rate (CIR) instead of age-standardized incidence rate (AIR) when comparing groups having different age structures.
Methods
After selecting a report using CIRs, AIRs and their 95% confidence intervals (CI) was calculated from the raw data. The statistically significant difference between CIR and AIR was decided based on AIR’s 95% CI.
Results
Comparing with AIRs, CIRs were over-estimated. And these effects led wrong inferences.
Conclusions
These findings are an additional evidence using AIR when comparing level of occurring infectious diseases on groups with different age structures.
Key Words: Scrub, typhus, Rickettsia, Ecology
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