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Table 2 Intraclass correlations of various coagulation tests and intraobserver variability of fibrinogen tests with various platforms

From: Variability between laboratories performing coagulation tests with identical platforms: a nationwide evaluation study

Parameter

Platform 1*

Platform 2

Platform 3

Platform 4‡

# laboratories

1

2

4

2

Fibrinogen

0.85

0.37

0.65

0.66

 Within- laboratory  variability ¶

 

0.02

0.03

0.04

 Between- laboratory  variability +

 

0.097

0.03

0.006

Prothrombin time

 

0.19

0.24

0.80

F II

 

0.44

0.04

 

F V

 

0.63

0.22

 

F VII

 

0.71

0.82

 

F VIII

 

0.93

0.61

 

F IX

 

0.86

0.83

 

F X

 

0.82

0.70

 

F XI

 

0.90

0.65

 

F XIII

 

0.57

0.81

 
  1. * laboratory was excluded from analysis of between-laboratory variability because of a unique platform, ‡ analysis was limited to routine coagulation parameters, because one laboratory did not assess all tests, ¶ (Platform + Technician), + Laboratories use the platform in different ways (they interpret the manual differently).