Inflammatory Biological Markers Are Clinically Useful in a Number of Different

Inflammatory biological markers are clinically useful in a number of different ways, one being the assessment of disease activity in conditions such as systemic lupus erythematosus (SLE) .  A new inflammatory marker is being investigated in patients with active SLE flares.  When the blood level of the new marker (in mg/L) is plotted against the C-reactive protein (CRP) level (also in mg/L) , the following plot is obtained: Based on the plot, the correlation coefficient between the 2 variables is closest to which of the following values?

A) +0.8
B) +0.2
C) 0
D) −0.2
E) −0.8

Correct Answer:

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