TABLE 1.

Colon and Rectal Cancers: Exclusion Criteria for Analysis Cohort, SEER 18, 2004-2010

Exclusion Criteria	Stage Trends	AJCC 6th & 7th Comparison	Site-Specific Factors (SSFs)
	Objective 1	Objective 2	Objective 3
In situ cases	no	no	yes
Autopsy or death certificate cases	yes	yes	yes
Histologies for which AJCC 6th or 7th stage is not defined*	yes	yes	yes
Code 988 (not applicable), blank for each SSF	no	no	yes
Year of diagnosis	2004-2010	2010	2010
Final sample size: Colon	191 361	25 577	24 437
Final sample size: Rectum	73 341	10 150	9678

^*American Joint Committee on Cancer (AJCC) 6th or 7th editions derived stage = NA identifies histologies for which stage is undefined for both colon and rectum.

Source: National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) Program: SEER 18 geographic areas: States of Connecticut, New Mexico, Utah, California (4 areas: San-Francisco, San Jose-Monterey, Los Angeles, Greater California), Hawaii, Iowa, New Jersey, Louisiana, Kentucky, Georgia (3 areas: Atlanta, Rural Georgia, and remainder of the state), Alaska Native Registry, and metropolitan areas of Detroit, Michigan and Seattle (Western Washington), Washington.