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  • Title: Treatment intensification in patients with type 2 diabetes who failed metformin monotherapy.
    Author: Fu AZ, Qiu Y, Davies MJ, Radican L, Engel SS.
    Journal: Diabetes Obes Metab; 2011 Aug; 13(8):765-9. PubMed ID: 21457427.
    Abstract:
    AIM: To evaluate the time to and factors associated with treatment intensification in patients with type 2 diabetes who failed metformin monotherapy. METHODS: In a retrospective analysis using a large US electronic medical record database, eligible patients included those with type 2 diabetes and an HbA(1c) of ≥7.0% or at least two fasting blood glucose levels of ≥126 mg/dl while on metformin monotherapy for at least 6 months within the period of 1 January 1997 to 31 December 2008. Time to treatment intensification was calculated as the time between index date (date on which HbA(1c) ≥ 7% after metformin monotherapy for at least 6 months) and first prescription for additional antihyperglycaemic agent during follow-up period. All patients were required to have data for at least 12 months prior to and following the index date. A Cox proportional hazards model was employed to determine patient baseline characteristics associated with time to treatment intensification. RESULTS: Of the 12 566 patients identified, mean age at index date was 63 years and 51% were female. Mean index HbA(1c) was 8.0% overall, with 66, 19 and 15% of patients having an index HbA(1c) of 7 to <8%, 8 to <9% and ≥9%, respectively. Median time to treatment intensification was 14.0 months overall and 19.0, 8.7 and 4.5 months for patients with index HbA(1c) of 7 to <8%, 8 to <9% and ≥9%, respectively. Factors associated with treatment intensification included higher index HbA(1c) , younger age, higher Charlson co-morbidity index, metformin daily dose ≥ 1500 mg and later index date (all p < 0.05). CONCLUSIONS: In US clinical practice, median time to receive additional antihyperglycaemic medication is more than 1 year for patients with type 2 diabetes who failed metformin monotherapy.
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