Comparison of Cancer Survival by Age Group for 1997 and for 2002: Application of Period Analysis using the National Cancer Incidence Database.
10.3961/jpmph.2008.41.1.17
- Author:
Seon Hee YIM
1
;
Kyu Won JUNG
;
Young Joo WON
;
Hyun Joo KONG
;
Hai Rim SHIN
Author Information
1. Cancer Registration and Biostatistics Branch, National Cancer Control Research Institute, National Cancer Center, Korea. hrshin@ncc.re.kr
- Publication Type:Original Article ; English Abstract ; Comparative Study
- Keywords:
Survival analysis;
Neoplasms;
Korea
- MeSH:
Adolescent;
Adult;
Age Distribution;
Aged;
Female;
Health Surveys;
Humans;
Korea/epidemiology;
Male;
Middle Aged;
Neoplasms/*epidemiology;
Survivors/*statistics & numerical data;
Time Factors
- From:Journal of Preventive Medicine and Public Health
2008;41(1):17-22
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVES: Period analysis estimates up-to-date survival rates of cancer patients. In this approach, analysis is restricted to recent time period by left-truncating all observations at the beginning of the period and rightcensoring at its end. Here, we applied period analysis to examine changes in 5-year relative survival (RS) by age group for 1997 and for 2002. METHODS: Using the National Cancer Incidence Database, 5-year RS was estimated for 1997 and 2002 in four age groups (15-54, 55-64, 65-74, and 75 years old and over) using period analysis. After excluding death certificate-only cases, patients with an unknown date of diagnosis or follow-up length, a total of 813,889 patients diagnosed with a first primary invasive cancer during 1992-2002 were included for analysis. Followup for vital status was included until 31 December 2002. RESULTS: Five-year RS increased from 41.7% for 1997 to 46.7% for 2002. Increases in survival occurred in all age groups except in the 75 and over group. CONCLSIONS: The age gradient in cancer prognosis seems to have widened between 1997 and 2002, a finding that requires further study of prognostic factors, including stage at diagnosis. Period analysis accurately estimates survival rates, especially for cancers with better prognosis.
