INS and type 2 diabetes mellitus: Since sensitivity corresponds to the percentage of subjects with a true diagnosis of T2DM who also have the DRUG_ORAL pattern of non-insulin antidiabetic drugs utilization, this percentage can be estimated from the Dutch PCD to be around 77%, or slightly lower if we accept that sensitivity in the Dutch PCD is not 100% (the corresponding percentage in the other two PCD data sources is lower than 55%).