Table 2.

Best fit models overall and by history of diagnosed diabetes

	1,5-Anhydroglucitol		Fructosamine		Glycated Albumin
	Model#	R2	Model	R2	Model	R2
Overall (N = 1719)
Best Fit
A1c	5.3903 + 5.5048/x	0.21	247.480 − 90.745ln(x) + 8.509(ln(x))2	0.46	26.275 − 17.612ln(x) + 3.720(ln(x))2	0.54
FG	212.182 − 66.594ln(x) + 10.153(ln(x))2	0.17	553.548 − 1.898e+05/x + 1.98e+07/x2	0.39	7.8278 + 7.3595x − 0.001262x3	0.41
Linear
A1c	6.4828 − 0.0388x	0.10	2.0958 + 0.0157x	0.39	2.9425 + 0.2011x	0.52
FG	128.8306 − 1.1732x	0.09	−2.3199 + 0.4678x	0.35	29.4777 + 5.5447x	0.39
History of Diabetes (N =343)*
Best Fit
A1c	5.7696 + 8.8587/x − 5.1029/x2	0.33	250.611 − 90.873ln(x) + 8.443(ln(x))2	0.61	4.163 + 0.1287x + 3.82e+05x3	0.71
FG	208.73 − 32.56ln(x) + 0.9807(ln(x))2	0.23	426.93 − 1.2077e+05/x + 1.14e+07/x2	0.32	130.8 − 8.837x + 0.712x2 − 0.0108x3	0.37
Linear
A1c	7.7246 − 0.0770x	0.20	1.8763 + 0.0177x	0.56	3.1198 + 0.2032x	0.69
FG	170.7132 − 2.5411x	0.20	14.4649 + 0.4504x	0.32	57.0838 + 4.5410x	0.30
No History of Diabetes (N = 1376)*
Best Fit
A1c	5.5935 + 0.1047/x + 4.5559/x2	0.04	9.5088 − 0.03831x + 9.25e+5x2	0.12	14.8959 + 0.5714x − 6.5423ln(x)	0.16
FG	101.7556 + 148.9338/x2	0.05	298.1406 − 1.8538x + 0.004328x2	0.24	603.933 + 27.0403x − 333.704ln(x)	0.28
Linear
A1c	5.8152 − 0.0101x	0.01	4.0437 + 0.0069x	0.07	3.9098 + 0.1267x	0.13
FG	106.6068 − 0.2107x	0.01	42.2954 + 0.2630x	0.12	43.5650 + 4.3574x	0.18

Abbreviations: A1c, hemoglobin A1c; FG, fasting glucose.

^*Diabetic status determined by self-reported history.

^#Modeling was performed using glucose concentrations expressed in mg/dL, 1,5-Anhydroglucitol concentrations in μg/mL, fructosamine concentrations in μmol/L and glycated albumin in %.