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. 2022 Mar 29;17(5):1226–1242. doi: 10.1177/19322968221085273

Figure 1.

Figure 1.

Correlation between pairs of metrics, where 1.0 indicates a strong correlation and −1.0 indicates a strong inverse correlation. The principal component analysis showed that the seven metrics divide into two highly correlated groups: a hypoglycemia-related group (including VLow, Low, and CV) and a hyperglycemia-related group (including VHigh, High, TIR, and MG). Therefore, each group of metrics is represented by one principal dimension, or essential component, of the quality of glycemia (the hypoglycemia component and the hyperglycemia component). Abbreviations: VLow, <54 mg/dL; <3.0 mmol/L; Low, 54-<70 mg/dL; 3.0-<3.9 mmol/L; CV, coefficient of variation (standard deviation of glucose/mean glucose); VHigh, >250 mg/dL; >13.9 mmol/L; High, >180-250 mg/dL; >10.0-13.9 mmol/L; TIR, time in target range (70-180 mg/dL; 3.9-10.0 mmol/L); MG, mean glucose (mg/dL).