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Table 3 Method comparison

From: Establishment of the upper reference limit for thyroid peroxidase autoantibodies according to the guidelines proposed by the National Academy of Clinical Biochemistry: comparison of five different automated methods

Methods

n

r (95 % CI)

IMM

 MAG

240

0.0011 (−0.1269 to 0.1291)

 KRY

240

−0.0235 (−0.1513 to 0.1050)

 PHA

240

0.0008 (−0.1266 to 0.1282)

LIA

240

0.0707 (−0.0576 to 0.1966)

KRY

 MAG

240

−0.0845 (−0.2108 to 0.0445)

 LIA

240

−0.0988 (−0.2247 to 0.0304)

 PHA

240

−0.0078 (−0.1362 to 0.1208)

LIA

 MAG

240

0.2628 (0.1390 to 0.3786)

 PHA

240

0.3679 (0.2521 to 0.4734)

MAG

 PHA

240

0.3226 (0.2028 to 0.4330)

  1. CI confidence intervals, IMM Immulite 2000 XPi, KRY Kryptor Compact Plus, LIA Liaison XL, MAG Maglumi 2000 Plus, PHA Phadia 250, r correlation coefficient