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Table 2 Characteristics of included studies in Type 2 diabetic adults

From: Systematic review and meta-analysis of the effectiveness of continuous glucose monitoring (CGM) on glucose control in diabetes

Study Country Duration n Intervention CGM Use SMBG Use Outcomes
Ehrhardt [34] USA 3 months 100 RT-CGM (DexCom SEVEN) vs. SMBG RT-CGM occurred in four cycles (2 weeks on/1 week off) for 3 months + SMBG before meals, at bedtime and at the time of hypo- or hyperglycemia SMBG before meals and at bedtime, at the time of hypo- or hyperglycemia • A1C
    I:50     • Change in mean and distribution of blood glucose
    C:50     
        • Weight
        • Blood Pressure
        • Diabetes – related stress
Cosson [32] France 3 months 25 RT-CGM (The GlucoDay system) vs. SMBG 48 hour of CGM at baseline and after 3 months + usual SMBG Usual SMBG • A1C
        • Compare the 48 h CGM data at baseline with those obtained after 3 months:
    I:11     
    C:14     
        - Glucose control
        - Glucose variability
        - Hypoglycemia
Allen [33] USA 8 weeks 46 RT-CGM vs. SMBG 72 hour of CGM + SMBG SMBG • Physical activity self efficacy
    I:21     
    C:25     • Physical activity levels
        • Blood pressure
        • Body mass index
        • A1C
Yoo [31] Korea 3 months 57 RT-CGM(Guardian RT) vs. SMBG Once a month for 3 day for 12 weeks + at least three SMBG per day SMBG at least four times a week, including fasting blood glucose and postprandial 2 h blood glucose levels for 3 months continuously • A1C
    I: 29     • Fasting blood glucose
    C:28     
        • Post prandial 2 h blood glucose
        • Lipid profiles
        • Weight
        • Waist circumference
        • Body mass index
  1. Abbreviations: RT-CGM real-time CGM, SMBG self monitoring of blood glucose.