Diagnostic codes of cancer in Skåne healthcare register: a validation study using individual-level data in southern Sweden

The Swedish healthcare is decentralised to 21 regions. Detailed information on all delivered care in the southernmost region, Skåne, is prospectively collected in the Skåne Healthcare Register (SHR). The data is updated daily and hence a good source for epidemiological studies. However, the diagnostic codes used to identify cancer patients in SHR have not yet been validated.We conducted a validation study including 1,473,204 residents in Skåne...