title: Preliminary estimates of SEER cancer incidence for 2013.
abstract: BACKGROUND
  This article presents a first look at rates and trends for cases in the Surveillance, Epidemiology, and End Results (SEER) program diagnosed through 2013 using the February 2015 submission, and a validation of rates and trends from the February 2014 submission using the subsequent November 2014 submission. To the authors' knowledge, this is the second time SEER has published trends based on the early February submission. Three new cancer sites were added: cervix, thyroid, and liver/ intrahepatic bile duct.
  
  
  METHODS
  A reporting delay model adjusted for the undercount of cases, which is substantially larger for the February than the subsequent November submission, was used. Joinpoint regression methodology was used to assess trends. Delay-adjusted rates and trends were checked to assess validity between the February and November 2014 submissions.
  
  
  RESULTS
  The validation of rates and trends from the February and November 2014 submissions demonstrated even better agreement than the previously reported comparison between the February and November 2013 submissions, thereby affording additional confidence that the delay-adjusted February submission data can be used to produce valid estimates of incidence trends. Trends for cases diagnosed through 2013 revealed more rapid declines in female colon and rectal cancer and prostate cancer. A plateau in female melanoma trends and a slowing of the increases in thyroid cancer and male liver/intrahepatic bile duct cancer trends were observed.
  
  
  CONCLUSIONS
  Analysis of early cancer data submissions can provide a preliminary indication of differences in incidence trends with an additional year of data. Although the delay adjustment correction adjusts for underreporting of cases, caution should be exercised when interpreting the results in this early submission. Cancer 2016;122:1579-87. © 2016 American Cancer Society.
authors.affiliation: Surveillance Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, Maryland.
authors.forename: Denise Riedel
authors.initials: DR
authors.lastname: Lewis
authors.affiliation: Surveillance Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, Maryland.
authors.forename: Huann-Sheng
authors.initials: HS
authors.lastname: Chen
authors.affiliation: Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California.
authors.forename: Myles
authors.initials: M
authors.lastname: Cockburn
authors.affiliation: Louisiana Tumor Registry, Louisiana State University, New Orleans, Louisiana.
authors.forename: Xiao-Cheng
authors.initials: XC
authors.lastname: Wu
authors.affiliation: New Jersey State Tumor Registry, Rutgers University, New Brunswick, New Jersey.
authors.forename: Antoinette M
authors.initials: AM
authors.lastname: Stroup
authors.affiliation: Biometry Research Group, Division of Cancer Prevention, National Cancer Institute, Bethesda, Maryland.
authors.forename: Douglas N
authors.initials: DN
authors.lastname: Midthune
authors.affiliation: Information Management Systems Incorporated, Calverton, Maryland.
authors.forename: Martin F
authors.initials: MF
authors.lastname: Krapcho
authors.affiliation: Information Management Systems Incorporated, Calverton, Maryland.
authors.forename: Daniel G
authors.initials: DG
authors.lastname: Miller
authors.affiliation: Surveillance Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, Maryland.
authors.forename: Lynne
authors.initials: L
authors.lastname: Penberthy
authors.affiliation: Surveillance Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, Maryland.
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Feuer
mesh_terms: D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D009369:Neoplasms / Q000453:epidemiology*; D015203:Reproducibility of Results; D018426:SEER Program; D012737:Sex Factors; D014481:United States / Q000453:epidemiology
keywords: annual percent change; average annual percent change; delay adjustment; early estimates of cancer incidence rates; population-based registry data