INS and type 1 diabetes mellitus: The Insulin Treatment Satisfaction Questionnaire (ITSQ), a measure of insulin treatment satisfaction, was developed by Anderson et al. to be applicable to a wide range of insulin therapies.3 It was initially validated in 572 patients with T1D and T2D to produce a five-factor, 22-item instrument, which has proved to be a conceptually and psychometrically sound and valid measure.