Long-Term Effect of the Color Record Method in Self-Monitoring of Blood Glucose on Metabolic Parameters in Type 2 Diabetes: A 2-Year Follow-up of the Color IMPACT Study.

Abstract

IntroductionThis article evaluates the potential long-term effect of two different color indication methods for self-monitoring of blood glucose (SMBG), the color record (CR) and color display (CD), on metabolic parameters in insulin-treated type 2 diabetes in a post-intervention period.Methods101 participants with type 2 diabetes who completed the Color IMPACT study were enrolled in a 2-year comparison follow-up study. Participants continued SMBG with their usual diabetes care. The study outcomes were differences in change in HbA1c levels, blood pressure (BP), body weight and lipid profiles between the CR and non-CR arms and the CD and non-CD arms during a 1- and 2-year period of the study.Results98 participants were analyzed. Reductions in HbA1c levels, systolic BP and low-density lipoprotein cholesterol levels were maintained in the CR arm by − 0.40% (95% CI: − 0.73 to − 0.06, p = 0.020), −1 3.2 mmHg (95% CI: − 24.1 to − 2.3, p = 0.019), − 11.4 mg/dl (95% CI: − 18.1 to − 4.6, p = 0.001), respectively, in a 1-year period. However, HbA1c and BP returned to the baseline levels during an additional 1-year period. In contrast, there were no significant changes in outcome in the CD arm during the study period.ConclusionIntervention promoting self-action such as the color record method in SMBG sustains a beneficial effect on metabolic parameters after the intervention. This long-term effect is helpful for people with type 2 diabetes to manage their diabetes ABCs (HbA1c, BP, cholesterol) and to prevent diabetic complications.Trial RegistrationUMIN clinical trials registry identifier, UMIN000006865.Electronic supplementary materialThe online version of this article (10.1007/s13300-018-0457-6) contains supplementary material, which is available to authorized users.