© 2002 by the American Diabetes Association, Inc.
Repaglinide Versus Metformin in Combination With Bedtime NPH Insulin in Patients With Type 2 Diabetes Established on Insulin/Metformin Combination TherapyFrom the Diabetes Centre, Whiston Hospital, Prescot, Merseyside, U.K. OBJECTIVETo compare the effect on glycemic control and weight gain of repaglinide versus metformin combined with bedtime NPH insulin in patients with type 2 diabetes.
RESEARCH DESIGN AND METHODSA total of 80 subjects treated with 850 or 1,000 mg t.i.d. metformin combined with bedtime NPH insulin were randomized to 13 weeks of open-label treatment with 4 mg t.i.d. repaglinide (n = 39) or metformin (dose unchanged) (n = 41). Insulin dose was titrated at the clinicians discretion, aiming for a fasting blood glucose (FBG) RESULTSBaseline age, diabetes duration, insulin requirement, weight, BMI, FBG, and HbA1c (Diabetes Control and Complications Trialaligned assay, normal range 4.66.2%) were similar. Glycemic control improved (nonsignificantly) with insulin/metformin by (mean) 0.4%, from 8.4 to 8.1% (P = 0.09) but deteriorated with insulin/repaglinide by (mean) 0.4%, from 8.1 to 8.6% (P = 0.03; P = 0.005 between groups). Weight gain was less with insulin/metformin: 0.9 ± 0.4 kg (means ± SE) (P = 0.01) versus 2.7 ± 0.4 kg (P < 0.0001) (P = 0.002 between groups). The Diabetes Treatment Satisfaction Questionnaire score (potential range 0 [minimum] to 36 [maximum]) increased from 32.4 ± 0.8 to 34.1 ± 0.5 (P = 0.01) with insulin/metformin but decreased from 32.5 ± 0.9 to 29.1 ± 1.3 (P < 0.002) with insulin/repaglinide. CONCLUSIONSCombined with bedtime NPH insulin, metformin provides superior glycemic control to repaglinide with less weight gain and improved diabetes treatment satisfaction.
Abbreviations: DTSQ, Diabetes Treatment Satisfaction Questionnaire FBG, fasting blood glucose WBQ, Well-Being Questionnaire
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