Table 2.
Parameter | HbA1c < 53 (n = 500) | HbA1c 53-63 (n = 386) | HbA1c 64-74 (n = 85) | HbA1c ≥ 75 (n = 28) | P value |
---|---|---|---|---|---|
TIR3.9–10 mmol/L (%) | 90.5 (84.0-94.9) | 78.1 (66.7-86.6)a | 55.0 (37.0-67.6)a,b | 27.2 (7.2-44.4)a,b,c | <0.001 |
TBR < 3.9 mmol/L (%) | 0.65 (0.00-2.87) | 0.00 (0.00-0.91)a | 0.00 (0.00-0.78)a | 0.00 (0.00-0.00)a,b | <0.001 |
TBR < 3.0 mmol/L (%) | 0.00 (0.00-0.13) | 0.00 (0.00-0.00)a | 0.00 (0.00-0.00) | 0.00 (0.00-0.00)a | <0.001 |
TAR > 10.0 mmol/L (%) | 5.79 (2.47-12.6) | 20.1 (11.5-31.8)a | 44.1 (28.3-62.8)a,b | 72.7 (55.6-92.8)a,b,c | <0.001 |
TAR > 13.9 mmol/L (%) | 0.00 (0.00-0.52) | 1.17 (0.00-4.17)a | 8.98 (3.91-16.8)a,b | 23.7 (14.4-56.2)a,b,c | <0.001 |
TIR3.9–10 mmol/L (%), day | 90.0(81.8-94.4) | 74.5 (60.2-84.6)a | 46.4 (36.7-63.9)a,b | 25.3 (7.12-39.1)a,b,c | <0.001 |
TBR < 3.9 mmol/L (%), day | 0.35 (0.00-2.43) | 0.00 (0.00-0.52)a | 0.00 (0.00-0.17)a | 0.00 (0.00-0.00)a,b | <0.001 |
TBR < 3.0 mmol/L (%), day | 0.00 (0.00-0.00) | 0.00 (0.00-0.00) | 0.00 (0.00-0.00) | 0.00 (0.00-0.00) | 0.026 |
TAR > 10.0 mmol/L (%), day | 7.29 (3.13-16.2) | 24.1 (14.1-39.4)a | 53.3 (35.4-62.6)a,b | 74.7 (60.9-92.9)a,b,c | <0.001 |
TAR > 13.9 mmol/L (%), day | 0.00 (0.00-0.69) | 1.39 (0.00-5.38)a | 11.1 (4.49-21.4)a,b | 25.6 (14.6-58.0)a,b,c | <0.001 |
TIR3.9–10 mmol/L (%), night | 97.4 (91.1-100.0) | 94.0 (82.8-99.0)a | 74.0 (46.9-89.6)a,b | 29.7 (9.11-72.1)a,b,c | <0.001 |
TBR < 3.9 mmol/L (%), night | 0.00 (0.00-4.69) | 0.00 (0.00-1.04)a | 0.00 (0.00-1.04)a | 0.00 (0.00-0.00)a,b,c | <0.001 |
TBR < 3.0 mmol/L (%), night | 0.00 (0.00-0.00) | 0.00 (0.00-0.00)a | 0.00 (0.00-0.00) | 0.00 (0.00-0.00) | 0.005 |
TAR > 10.0 mmol/L (%), night | 0.00 (0.00-1.56) | 3.13 (0.00-12.5)a | 18.75 (6.25-53.1)a,b | 70.31 (27.86-90.89)a,b,c | <0.001 |
TAR > 13.9 mmol/L (%), night | 0.00 (0.00-0.00) | 0.00 (0.00-0.00)a | 0.52 (0.00-6.77)a,b | 16.7 (2.60-47.4)a,b,c | <0.001 |
Data are median (Q1-Q3). Differences between the 4 HbA1c groups were tested using the Kruskal-Wallis test with the post hoc Steel-Dwass test.
Abbreviations: TAR, time above range; TBR, time below range; TIR, time in range.
a P < 0.05 vs. HbA1c < 53.
b P < 0.05 vs HbA1c 53-63.
c P < 0.05 vs HbA1c 64-74.