I believe it is either from the diagnosis or it's 1 year more than if you had done nothing. I could be way off. Either way the statistics don't help. They are very often wrong and they are not worth too much attention.
A positive attitude and calmness go a long way to help. Best wishes on your journey.
Female age 38- ,2 teens.
Colon Cancer - DX March 2013
Age 34 at DX - Stage III B
Resection surgery -May 2013
FOLFOX - June, 2013 to Sept, 2013
5FU plus leukavorin Sept, 2013 to Dec, 2013
METs liver and lungs discovered Sept, 2015
KRAS - MSS
FOLFIRI plus Avastin - Sept, 2015 - July 2017
Durvalumab and Cediranib Sept 2017 -current
CEA at recurrence:10.1/august, 2015
CEA: 1.9 February, 2016
CEA: 16.4 March 2017
CEA: 90.1 October 2017