Figure 1. . Patient selection and tumor sample evaluation of PD-L1 and microsatellite instability.

Eligible patients were identified within the Aarhus University pathology network using the Danish Pathology Register for tissue and the associated clinical database. *Initial screening identified 435 patients; nine were excluded because of duplicate records.

dMMR: Deficient mismatch repair; dMMR IHC: Immunohistochemistry deficient mismatch repair; MSI: Microsatellite instability; OS: Overall survival.