title: [Population ageing effect on number of cancer cases: Italian cancer registries data].
abstract: OBJECTIVE
  To describe causes of cancer incidence increase. We identified and quantified a population ageing factor, a factor due to incidence trend of cancer sites with early-diagnosis interventions and a remainder factor (concerning all other cancer sites).
  
  
  METHODS
  We calculated incidence rates for two calendar period (1993-95 and 2003-05).We used data from Cancer Registries with at least one incidence year available for each period (jointly for males and female). We compared crude and age-adjusted rates by the direct method for prostate cancer, breast cancer, colorectal cancer, melanoma of the skin cancer, thyroid cancer, group of other cancer sites and for all cancer sites (but non-melanoma skin cancer).
  
  
  RESULTS
  Since 1993-95 to 2003-05 all cancer crude incidence rates have been increasing 17.9% (from 555.4 cases for 100,000 inhabitants/years to 654.8). If population age structure had remained the same, rates would have increased only 6.6% (from 555.4 to 592.0): almost 2/3 of observed increasing are due to population ageing. The remainder part of the increasing is due to incidence trend of cancer sites with early-diagnosis interventions (that anticipates the diagnosis).
  
  
  CONCLUSIONS
  This study helps to quantify the incidence increase due to population ageing and the raise due to trend of cancer sites with early-diagnosis interventions.
authors.affiliation: Unità Operativa di Epidemiologia Clinica e Descrittiva, Istituto per lo Studio e la Prevenzione Oncologica, Firenze. c.buzzoni@ispo.toscana.it
authors.forename: Carlotta
authors.initials: C
authors.lastname: Buzzoni
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D004198:Disease Susceptibility; D005260:Female; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D007558:Italy / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000453:epidemiology*; D011157:Population Dynamics; D012042:Registries / Q000706:statistics & numerical data*; D055815:Young Adult