INS and type 2 diabetes mellitus: Insulin-naïve people with type 2 diabetes (n = 8009), ≥ 35 years old, HbA1c ≥ 6.5% and begun on NPH (n = 1463), detemir (n = 357), glargine (n = 2197) or premix (n = 3992), were identified from a UK database of primary care records (The Health Improvement Network).