title: [An age-period-cohort modelling study on primary liver cancer incidence rate in Qidong].
abstract: OBJECTIVE
  To analyze the incidence trends of primary liver cancer (PLC) in Qidong.
  
  
  METHODS
  Data of PLC incidence from 1975 to 1999 in Qidong were analyzed to delineate temporal trends and birth cohort patterns, using age-period-cohort models.
  
  
  RESULTS
  Significant moderation or decreasing trends were began to notice in incidence rates on cohorts born in 1913 - 1917 and 1958 - 1962.
  
  
  CONCLUSIONS
  Results showed that the incidence risk of the birth cohorts after 1958 - 1962 started to decline. The changes were possibly associated with the implementation of some practical measures on prevention.
authors.affiliation: School of Medicine Ningbo University, Ningbo 315211, China.
authors.forename: Qi-jun
authors.initials: QJ
authors.lastname: Shen
authors.forename: Xue-feng
authors.initials: XF
authors.lastname: Zhang
authors.forename: Jian-guo
authors.initials: JG
authors.lastname: Chen
authors.forename: Wen-guang
authors.initials: WG
authors.lastname: Li
authors.forename: Hong-yu
authors.initials: HY
authors.lastname: Yao
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D006528:Carcinoma, Hepatocellular / Q000453:epidemiology*; D002681:China / Q000453:epidemiology; D015331:Cohort Studies; D005260:Female; D006801:Humans; D015994:Incidence; D008113:Liver Neoplasms / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D012737:Sex Factors