Agreement between questionnaires and registry data on routes to diagnosis and milestone dates of the cancer diagnostic pathway.

•We found reasonable agreement on routes to diagnosis and milestone dates in the cancer pathway between patient, physicians and cancer registry.•Agreement on routes to diagnosis was higher for breast cancer than for colorectal, ovarian and lung cancers.•Agreement on date of diagnosis date was higher than for date of first presentation to primary care and date of treatment.•Combining multiple data sources can provide more complete and reliable information on the cancer diagnostic pathway.