Table 3. Agreement between two methods under the four levels of 25-OH D vitamin.

Kappa coefficient: 0.738; Standard error: 0.062 p=0.000

		Architect 25-OH D Vitamin Assay Number of samples (percentage %)
		Severe deficiency	Deficiency	Insufficiency	Sufficiency	Sum
LC-MS/MS system Number of samples (percentage %)	Severe deficiency	17 (21.3%)	-	-	-	17 (21.3%)
	Deficiency	4 (5.1%)	21 (26.6%)	3 (3.8%)	-	28 (35.5%)
	Insufficiency	-	6 (7.6%)	17 (21.5%)	-	23 (29.1%)
	Sufficiency	-	-	2 (2.5%)	9 (11.4%)	11 (13.9%)
	Sum	21 (26.4%)	27 (34.2%)	22 (27.8%)	9 (11.4%)	79 (100%)