Efficacy and Safety of Biphasic Insulin Aspart 30 in Combination With Metformin in Type 2 Diabetes

Inclusion Criteria: * Type 2 diabetes for at least 6 months * Insulin naive. Short term insulin treatment (7 days or less within the last 6 months) is allowed * Previous treatment with oral antidiabetic drugs for at least 4 months * Judged by the investigator to be eligible for an insulin analogue plus oral antidiabetic drug treatment regimen * BMI below 40 kg/m2 * HbA1c between 7-12% * Able and willing to perform self-plasma glucose monitoring Exclusion Criteria: * The receipt of any other investigational drug within 4 weeks before screening * A history of drug or alcohol abuse within the last 12 months * Severe, uncontrolled hypertension * Known or suspected allergy to trial products or related products