About

Taiwan Infectious Disease Map (https://id.geohealth.tw/) is created by the authors leading by Ta-Chien Chan. It utilizes infectious-disease-related statistical data from Taiwan CDC. We then automatically bridge this data into our database daily and calculate the age-adjusted incidence rate by annual census data and 2000 WH0 standard population. The spatial hotspots of the selected infectious diseases are detected online by spatial statistics. The ranking of the disease incidence in the city or township level can be explored by bar charts. The spatio-temporal trend and demographic profiles of the selected disease can be examined by the interactive maps and statistical charts. The health education button can directly link to an introduction to the selected infectious disease maintained by the Taiwan CDC.

Funding Sources

Academia Sinica - Multidisciplinary Health Cloud Research Program: Technology Development and Application of Big Health Data

Chief Investigators

Vice President Andrew H.-J. Wang (Academia Sinica), Vice President Fan-sen Wang (Academia Sinica)

Principal Investigator

Chief Executive Officer I-chun Fan (Center for GIS)

Co-Principal Investigators

Associate Researcher Pei-Shan Liao (Center for Survey Research), Associate Researcher Ta-Chien Chan (Center for GIS)

Cooperation Unit

Centers for Disease Control, R.O.C. (Taiwan)

Authors

Ta-Chien Chan Yung-Chu Teng Chiao-Ling Kuo Chien-Chou Chen Bo-Cheng Lin Jui-Hung Kao Yao-Hsien Yeh

Copyright and Sources

Map data © OpenStreetMap contributors. Charts © Highcharts, CC BY 3.0. Infectious diseases data © DATA.GOV.TW.
Sources of Population Data:
2004-2005: Taiwan-Fukien Demographic Fact Book, Republic of China, year-end population.
2006-2007: Taiwan-Fukien Demographic Fact Book, Republic of China, year-end population.
2008-2016: Socio-Economic Database, Mistry of Interior, year-end population.

World Standard Population: The World Health Organization's (WHO) new World Standard Population (2000).

Note：

1. About the record date of In infectious disease data,the date for HIV Infection, AIDS, Hansens, Syphilis, or Gonorrhea is "Diagnosis Date", the date for Tuberculosis or Multiple-drug Resistant Tuberculosis is "Filing Date", and the date for other disease is "Onset Date".
2. We use year-end population for 2016 to calculate incidence for 2017.
3. At present, only Dengue data is weekly data.
4. The order of drop-down list of disease is determined by the total number of newly diagnosed cases of infectious diseases between 2013/1 and 2016/3.

Proper Nouns

• Standardized Incidence Rate: Our map uses age-adjusted incidence rate to compare different area and removed the effect of age structure. The method of calculating standardized incidence rate is following:
  1. First, calculate incidence rate, the number of new cases per population, in each age group ( 18 groups in total: 0–4, 5–9, 10–14,…,80–84,and more then 85).
  2. Multiply each incidence rate by World Standard Population (2000) in each age group to get age-sepcific standardized incidence rates.
  3. Sum across all the age-sepcific standardized incidence rates to get the standardized incidence rates.


• Local Moran's I: Local Moran's I is the measurement of the relevance among an individual region and adjacent areas. When the value of Local Moran’s I statistic is positive, it means positive correlation. Local Moran’s I () is computed as:
  ,
  
  where,is Local Moran’s I statistic of town i,is the standardized incidence r of town i,is the mean of standardized incidence rates of towns,is the spatial weight between town i and j, and n is the total number of towns.
  The z score for the statistics are computed as:
  
  where Z score represents the statistical significance of the computed index value, expected Value, is variance, and
  
  
  
  

  References：Chan TC, King CC. Surveillance and Epidemiology of Infectious Diseases Using Spatial and Temporal Clustering Methods. In: Castillo-Chavez C, Chen H, Lober WB, Thurmond M, Zeng D, eds. Infectious Disease Informatics and Biosurveillance: Research, Systems and Case Studies. U.S.A.: Springer; 2010; 208-234.

Reference Method

Ta-Chien Chan, Yung-Chu Teng, Chiao-Ling Kuo, Chien-Chou Chen, Bo-Cheng Lin, Jui-Hung Kao, Yao-Hsien Yeh. (2016). [online] Taiwan Infectious Disease Map. Available at: https://ide.geohealth.tw/ [Accessed Date].


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