Figure 1Areas of surveillance included in this study. The left map shows all of South Korea and the dotted area represents the Gyeonggi-do province. In the right map of the Gyeonggi-do province, areas with grayscale shading and cross-hatching represent urban and rural areas, respectively. The solid black area is Uijeongbu, the solid gray shows Dongducheon, vertical stripes show Yangju, the diagonal stripe area is Pocheon, and horizontal stripes show the Yeoncheon district.
Figure 2
Schematic summary of the construction of the NHID-Cohort 2002–2013 database.
NHID = National Health Information Database; NHI = National Health Insurance.
Figure 3
Time trends in the prevalence of 12 diseases using data collated by the NHI Cohort Database based on the National Health Information Database (NHID Cohort 2002–2013), South Korea, 2002 to 2013. Solid lines with circles represent data from the Northern Gyeonggi-do province and dotted lines with triangles show the averages of all other provinces in South Korea.
NHI = National Health Insurance.
Figure 4Population datasheets for the years 2000, 2005, and 2010. (A) The numbers of people in each district of the Northern Gyeonggi-do province. The population of South Korea was 45,985,289 in 2000, 47,041,434 in 2005, and 47,990,761 in 2010. (B) The percentage of the population that was 65 years and older in each district of the Northern Gyeonggi-do province. This percentage has increased nationally as well as in the Northern Gyeonggi-do province, except for Uijeongbu city. The data were based on the statistical database of Statistics Korea (KOSTAT).
Table 110th revision, clinical modification codes of the diseases used to search the NHID-Cohort 2002–2013.
10th revision, clinical modification codes |
Diseases |
Certain infections and parasitic diseases |
B50.* to B54.* |
Malaria |
|
Neoplasms |
C53.* |
Uterine cervix cancer |
C67.* |
Urinary bladder cancer |
C18.* |
Colon cancer |
|
Endocrine, nutritional and metabolic diseases |
E10.* to E14.* |
Diabetes mellitus |
|
Mental and behavioral disorders |
F00.* to F99.* |
Psychiatric disorders |
|
Diseases of the circulatory system |
I10.* to I15.* |
Hypertension |
I21.* to I22.* |
Acute myocardial infarction |
I60.* to I62.* |
Intracranial hemorrhage |
|
Diseases of the respiratory system |
J20.* to J22.* |
Bronchitis/bronchiolitis |
|
Diseases of the digestive system |
K25.* to K27.* |
Peptic ulcer |
|
Diseases of the genitourinary system |
N18.6 |
End stage renal disease |