There were no differences in the course of DM treatment among the study population with and without concomitant AF (oral medication vs insulin vs both oral + insulin): 72% (95% CI: 68.7–75.1) received only oral hypoglycaemic medication; 12.9% (95% CI: 10.7–15.5) was taking both oral treatment + insulin injections; and 15.1% (95% CI: 12.7–17.8) were administered with insulin only. This evidence concerns the gene INS and diabetes mellitus.