Table 3 Nonparametric correlation coefficients between the free hemoglobin concentrations obtained with four different methods.

ELISA

1

0.407

0.412

0.408

1^a

0.534^a

0.510^a

0.484^a

1^b

0.552^b

0.528^b

0.512^b

Harboe

0.407

1

0.937

0.552

0.534^a

1^a

0.988^a

0.806^a

0.552^b

1^b

0.989^b

0.774^b

Noe

0.412

0.937

1

0.557

0.510^a

0.988^a

1^a

0.791^a

0.528^b

0.989^b

1^b

0.771^b

Fairbanks

0.408

0.552

0.557

1

0.484^a

0.806^a

0.791^a

1^a

0.512^b

0.774^b

0.771^b

1^b