Assay

Commercial lab 1 (CLIA)

Commercial lab 2 (CLIA)

MI02 Shionogi® BNP (CLEIA)

Initial concentrations

y = 0.955 x + 6.65

(R2 = 0.994, P < 0.0001)

y = 0.628 x + 1.19

(R2 = 0.989, P < 0.0001)

y = 0.799 x − 0.81

(R2 = 0.990, P < 0.0001)

Adjusted concentrations

(Calibrators contain botha)

y = 1.005 x − 0.96

(R2 = 0.994, P < 0.0001)

y = 0.961 x + 3.67

(R2 = 0.988, P < 0.0001)

y = 0.911 x + 5.49

(R2 = 0.991, P < 0.0001)

Adjusted concentrations

(Calibrators contain only BNP-32)

y = 0.733 x + 0.03

(R2 = 0.995, P < 0.0001)

y = 1.392 x − 13.25

(R2 = 0.989, P < 0.0001)

y = 0.774 x − 1.17

(R2 = 0.990, P < 0.0001)

Adjusted concentrations

(Calibrators contain only glyc proBNP)

y = 1.089 x − 2.97

(R2 = 0.993, P < 0.0001)

y = 0.899 x − 0.43

(R2 = 0.989, P < 0.0001)

y = 0.732 x + 1.30

(R2 = 0.989, P < 0.0001)