Table 3.

Spearman’s correlation coefficients and summary statistics from linear (Deming) regression (unadjusted) for HbA_1c or fasting glucose on glycated albumin or fructosamine stratified by CKD category and anemia status^†

	CKD categories	With anemia N=525				Without anemia N=1,140
		Spearman’s r	Deming Regression			Spearman’s r	Deming Regression
			Intercept	Slope	RMSE		Intercept	Slope	RMSE
HbA1c, % (X) and fasting glucose, mmol/L (Y)	No CKD	0.59	−12.84	3.00	0.72	0.70	−7.93	2.36	0.69
	Moderate CKD	0.62	−9.33	2.48	0.72	0.64	−8.57	2.40	0.85
	Severe CKD	0.53	−16.20	3.48	0.89	0.52	−10.11	2.65	0.91
	Very Severe CKD	0.35	−12.78	2.89	1.15	0.67	−12.60	3.02	0.76
Glycated albumin, % (X) and fasting glucose, mmol/L (Y)	No CKD	0.48	0.12	0.44	1.52	0.56	2.11	0.34	1.47
	Moderate CKD	0.51	2.12	0.32	1.57	0.50	0.46	0.45	1.87
	Severe CKD	0.40	3.27	0.23	1.67	0.41	0.50	0.45	1.90
	Very Severe CKD	0.29	3.71	0.19	2.09	0.53	−1.23	0.57	1.79
Fructosamine, umol/L (X) and fasting glucose, mmol/L (Y)	No CKD	0.49	0.90	0.02	1.68	0.54	1.59	0.02	1.55
	Moderate CKD	0.54	1.13	0.02	1.62	0.54	−1.06	0.03	1.95
	Severe CKD	0.43	3.29	0.01	1.71	0.41	0.35	0.03	2.10
	Very Severe CKD	0.28	3.90	0.01	2.16	0.50	−0.72	0.03	2.08
Glycated albumin, % (X) and HbA1c, % (Y)	No CKD	0.67	3.01	0.23	0.63	0.68	2.97	0.23	0.57
	Moderate CKD	0.72	3.44	0.20	0.63	0.72	2.50	0.27	0.63
	Severe CKD	0.63	3.47	0.19	0.68	0.74	2.43	0.27	0.62
	Very Severe CKD	0.72	2.95	0.22	0.75	0.71	2.91	0.24	0.69
Fructosamine, umol/L (X) and HbA1c, % (Y)	No CKD	0.61	2.79	0.01	0.72	0.64	2.22	0.02	0.66
	Moderate CKD	0.68	2.65	0.02	0.70	0.67	1.19	0.02	0.74
	Severe CKD	0.55	3.09	0.01	0.75	0.64	1.61	0.02	0.79
	Very Severe CKD	0.64	2.05	0.02	0.83	0.62	2.59	0.02	0.85

^†Anemia was defined using sex-specific cut-points of hemoglobin 130 g/l for men and 120 g/l for women.

Note: Chronic kidney disease staging was done using the KDIGO 2012 guidelines with eGFR and albumin-to-creatinine ratio.