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COMPARATIVE STUDY
JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL

Prandial insulin substitution with insulin lispro or insulin lispro mid mixture vs. basal therapy with insulin glargine: a randomized controlled trial in patients with type 2 diabetes beginning insulin therapy

Christof Kazda, Hiltrud Hülstrunk, Karin Helsberg, Frank Langer, Thomas Forst, Markolf Hanefeld
Journal of Diabetes and its Complications 2006, 20 (3): 145-52
16632233

PURPOSE: To compare the effects of prandial insulin therapy focusing on postprandial glucose control vs. basal insulin therapy focusing on fasting glucose control in patients with type 2 diabetes.

METHODS: This was an open-label, randomized, parallel, three-arm multicenter trial in patients with type 2 diabetes starting insulin treatment. Patients (n=159) were randomly assigned to 24-week treatment with 3x daily insulin lispro, 3x daily lispro mid mixture (MidMix; 50% lispro, 50% protaminated lispro), or 1x daily insulin glargine; oral antihyperglycemic agents were discontinued. Primary end point was the postprandial glucose excursion 2 h after breakfast at the end of study. Secondary outcomes included HbA1c, self-monitored blood glucose profiles, hypoglycemic episodes, body weight, and patient satisfaction.

RESULTS: At the end of study, glucose excursions 2 h after breakfast were significantly lower with lispro and MidMix than with glargine (P<.001 for each vs. glargine): lispro, -0.6+/-2.0 mmol/l; MidMix, +0.8+/-2.4 mmol/l; glargine, +2.5+/-2.4 mmol/l. Fasting glucose decreases were significantly greater with glargine (-2.6+/-2.4 mmol/l) than with lispro or MidMix (-0.9+/-2.2 mmol/l; +0.9+/-1.8 mmol/l). Nevertheless, HbA1c decreased by 1.1% (lispro) and 1.2% (MidMix), vs. 0.3% with glargine. Hypoglycemic episodes were rare with 1-1.5 self-reported episodes per 100 patient-days.

CONCLUSIONS: In patients with type 2 diabetes starting insulin, 3x daily prandial treatment with a rapid-acting analog focusing on postprandial glucose values enabled better control of postprandial and circadian blood glucose profiles than once-daily glargine, in spite suboptimal fasting glucose levels, which targets fasting glucose values. These results support studies suggesting that control of postprandial hyperglycemia plays a key role in achieving HbA1c targets.

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