Colon cancer, malignant (ICD10 C18): combined sexes

Five-year relative survival by diagnosis year and age at diagnosis

	Five-year relative survival (with 95% confidence interval) by diagnosis year				EUROCARE-4	EUROCARE-4
Age at diagnosis	1994-97	1998-2002	2003-2007	2007-2009	##1995-1999	##1995-1999
	cohort	cohort	cohort	*hybrid	Ireland	Europe average

all 15-99	50.5%	53.1%	57.7%	58.2%
(unstandardized)	(48.6-52.4%)	(51.4-54.8%)	(55.7-59.6%)	(56.1-60.2%)

all 15-99	50.2%	53.2%	57.6%	57.6%	52.2%	54.5%
(age-standardized)#	(64.1-54.2%)	(49.5-56.7%)	(53.4-71.7%)	(53.1-61.8%)	(50.5-53.9%)	(54.1-54.9%)

15-44	48.7%	54.6%	64.9%	64.1%
	(40.5-56.4%)	(47.1-61.5%)	(57.0-71.8%)	(54.5-72.2%)

45-54	53.4%	58.9%	62.0%	63.1%
	(48.0-58.4%)	(54.2-63.2%)	(56.3-67.1%)	(56.9-68.7%)

55-64	51.3%	56.7%	61.7%	63.6%
	(47.5-54.9%)	(53.3-59.9%)	(57.7-65.5%)	(59.5-67.4%)

65-74	50.7%	52.6%	56.7%	54.9%
	(47.6-53.8%)	(49.8-55.3%)	(53.4-59.9%)	(51.4-58.3%)

75-99	47.7%	48.3%	51.7%	51.5%
	(43.8-51.7%)	(44.9-51.7%)	(47.9-55.5%)	(47.5-55.6%)

Footnotes:

*Hybrid estimate for 2007-2009 is the most up-to-date survival estimate and is based on follow-up of all cases alive at any point during this period,

supplemented by follow-up 2005-2009 for cases diagnosed in 2005 or 2006 (to provide more reliable estimation of the first two years of survival).

In practice, the hybrid estimate for 2007-2009 is similar to the most recent (incomplete) cohort, i.e. cases diagnosed 2003-2007, reflecting substantial overlap of data.

# Age-standardized figures use the standard patient population proposed for this cancer by:

Corazziari I., Quinn M. & Capocaccia R. 2004. Standard cancer patient population for age standardising survival ratios. Eur J Cancer 40: 2307-2316.

(Population weights = age 15-44 x7000, 45-54 x12000, 55-64 x23000, 65-74 x29000, 75-99 x29000)

## For comparison, the age-standardized average survival is quoted for countries (including Ireland) that participated in the EUROCARE-4 study:

Sant M. et al. 2009. EUROCARE-4. Survival of cancer patients diagnosed in 1995-1999. Results and commentary. Eur J Cancer 45: 931-991.

Exclusions (as in EUROCARE):

Patients aged <15 or >99 at diagnosis; death-certificate-only (DCO) and autopsy-only cases; second or subsequent malignancies in the same patient

(or the less serious of two or more synchronously-diagnosed malignancies); in situ carcinomas and tumours of uncertain behaviour.