Survey among 2215 well-controlled type 2 diabetes patients (not using insulin, HbA1c ≤58 mmol/mol, systolic blood pressure ≤145 mmHg and total cholesterol ≤5.2 mmol/l) who participated in the EFFIMODI study, a randomised controlled patient-preference equivalence trial. Here, INS is linked to type 2 diabetes mellitus.