INS and diabetes mellitus: The higher the age of the adolescent (β = 0.13, p = 0.003) and the longer the duration of diabetes (β = 0.08, p = 0.027), the poorer the metabolic control, but lower age (β = -0.12, p = 0.002), being male (β = 0.09, p = 0.009), shorter duration of diabetes (β = -0.07, p = 0.022), and using an insulin pump vs. multiple daily injections (β = 0.16, p = 0.000) were associated with better adherence.