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Table 7 Results of interpeptide comparison by Passing-Bablok non-parametric regression analysis

From: An LC–MS-based designated comparison method with similar performance to the Lp(a) reference measurement procedure to guide molar Lp(a) standardization

Test

X Peptide

Y Peptide

Intercept

Slope

Median bias (nmol/L)

Median bias (%)

Pearson's R

Mean X ± SD (nmol/L)

Median X (min – max) (nmol/L)

Mean Y ± SD (nmol/L)

Median Y (min – max) (nmol/L)

N

RMP

LFLEPTQADIALLK

GISSTVTGR

− 1.5 (− 2.7 to − 0.8)

0.989 (0.970 – 1.011)

-2.2

-3.9

0.987

112.2 ± 93.6

85 (4.4 – 475)

109.5 ± 90.9

78 (3.1 – 459

151

RMP

LFLEPTQADIALLK

TPENYPNAGLTR

− 2.1 (− 4.1 to − 1.1)

0.950 (0.916 – 0.986)

-5.1

-10

0.984

112.2 ± 93.6

85 (4.4—475)

104.3 ± 86.8

73 (4.3 – 425)

151

DCM

LFLEPTQADIALLK

GISSTVTGR

− 2.9 (− 4.2 to − 1.2)

1.049 (1.016 – 1.075)

0.4

0.5

0.985

109 + 89.4

80 (3.8 – 455)

109.9 ± 94.1

78 (2.7 – 544)

150