Table 2

HbA1c, fructosamine, FHbA1c, and G-gap results derived from the separate pairs of HbA1c-fructosamine estimations

HbA1c-fructosamine pairsFirst (latest)SecondThird (oldest)
n2,2632,2631,217
Glycated HbA1c (%)8.3 ± 1.7 (4.0–17.7)8.5 ± 1.8* (4.6–18.1)8.6 ± 1.8* (4.7–17.1)
Fructosamine (µmol/L)308 ± 77 (143–978)315 ± 81* (72–853)318 ± 82* (167–821)
FHbA1c (%HbA1c)8.3 ± 1.7 (4.6–23.4)8.5 ± 1.8* (3.2–20.4)8.6 ± 1.8* (5.3–19.7)
G-gap (%HbA1c)0.0 ± 1.2 (−8.2 to 5.9)0.0 ± 1.3 ns (−7.3 to 9.1)0.0 ± 1.3 ns (−7.9 to 4.3)
G-gap/HbA1c (%)−1.6 ± 15.1 (−85 to 48)−1.2 ± 15.4 ns (−119 to 64)−0.8 ± 17.0 ns (−122 to 57)
  • Statistical significance was determined separately for the first two and all three samples.

  • *P < 0.001.