[Descriptive analysis of incidence and time trends of esophageal and gastric cancers in Linzhou city].
OBJECTIVE
To analyze the incidence and time trends of esophageal and gastric cancers in Linzhou city bassed on the data of Linxian Tumor Registry, and to provide valid reference data for research and effective estimation of cancer control in this area.


METHODS
All incidence records for the both cancers during 1988-2003 were drawn from Linzhou Tumor Registry and grouped by sex, age, year and then linked to corresponding population data. The incidence rates of those two topographic site cancers were calculated and the age-adjusted rates were calculated by direct standardization to the world population. A joinpoint model was used to get the annual percentage change (APC) of the age-adjusted rates, and to estimate the epidemiological trends of both cancers in population of Linzhou city.


RESULTS
In the year 2003 the age-adjusted incidence rates of esophageal and gastric cancers were 81.78 per 100 000 and 77.08 per 100 000, respectively, in the population of Linzhou city. The incidence rate of both cancers showed a decreasing trend from 1988 to 2003. The APC of the incidence rates of esophageal cancer was - 2.6% and that of gastric cancer was - 1.8%, and both indexes were statistically significant (P < 0.05).


CONCLUSIONS
The incidence rates of esophageal and gastric cancers have presented a decreasing trends in the population of Linzhou city. This trend will continue along with the development of social economy, elevation of living standard and improvement in living habit and environment.
Sun
Xi-Bin
XB
Henan Office for Cancer Prevention and Control, Zhengzhou 450008, China. xbsun21@sina.com
Liu
Zhi-Cai
ZC
Liu
Shu-Zheng
SZ
Li
Bian-Yun
BY
Dai
Di-Xin
DX
Quan
Pei-Liang
PL
Cheng
Lan-Ping
LP
Lu
Jian-Bang
JB
D002299:Cardia; D002681:China / Q000453:epidemiology; D004938:Esophageal Neoplasms / Q000453:epidemiology*; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D012737:Sex Factors; D013274:Stomach Neoplasms / Q000453:epidemiology*