The impact of insulin type on severe hypoglycaemia events requiring inpatient and emergency department care in patients with type 2 diabetes.

Solomon MD, Vijan S, Forma FM, Conrad RM, Summers NT, Lakdawalla DN. The impact of insulin type on severe hypoglycaemia events requiring inpatient and emergency department care in patients with type 2 diabetes. Diabetes research and clinical practice. 2013 Dec 1; 102(3):175-82.

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Abstract:

AIMS: To evaluate the risk from different insulin types on severe hypoglycaemia (SHG) events requiring inpatient (IP) or emergency department (ED) care in patients with type 2 diabetes. METHODS: Type 2 diabetes patients newly started on insulin in a large commercial claims database were evaluated for SHG events. Patients were classified into an insulin group based on their most frequently used insulin type. Multivariable Cox models assessed the association between insulin type and the risk of SHG events. RESULTS: We identified 8626 patients (mean age 53.5 years; 55% female) with type 2 diabetes followed for an average of 4.0 years after insulin initiation. Of these, 161 (1.9%) had a SHG event at an average of 3.1y after insulin initiation. Patients with SHG events were slightly older (56.4 vs. 53.4 years), used a similar number of OADs (1.1 vs. 1.2) but had more co-morbidities compared with those without SHG events. In multivariate Cox models, premixed insulin (HR 2.12; p < 0.01), isophane insulin (NPH) (HR 2.02; p < 0.01), and rapid acting insulin (HR 2.75; p < 0.01) had significantly higher risks of SHG events compared with glargine. No statistically significant difference in SHG events was seen with detemir (HR 1.20; p = 0.73). CONCLUSIONS: Among patients with type 2 diabetes, the use of newer basal insulin analogues was associated with lower rates of SHG events requiring IP or ED care compared with users of other insulin formulations. Future research should examine the impact of hypoglycaemia events of different severity levels.