title: [Descriptive analysis of incidence and time trends of esophageal and gastric cancers in Linzhou city].
abstract: 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.
authors.affiliation: Henan Office for Cancer Prevention and Control, Zhengzhou 450008, China. xbsun21@sina.com
authors.forename: Xi-Bin
authors.initials: XB
authors.lastname: Sun
authors.forename: Zhi-Cai
authors.initials: ZC
authors.lastname: Liu
authors.forename: Shu-Zheng
authors.initials: SZ
authors.lastname: Liu
authors.forename: Bian-Yun
authors.initials: BY
authors.lastname: Li
authors.forename: Di-Xin
authors.initials: DX
authors.lastname: Dai
authors.forename: Pei-Liang
authors.initials: PL
authors.lastname: Quan
authors.forename: Lan-Ping
authors.initials: LP
authors.lastname: Cheng
authors.forename: Jian-Bang
authors.initials: JB
authors.lastname: Lu
mesh_terms: 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*