Inflammatory Biological Markers Are Clinically Useful in a Number of Different

question 56

Multiple Choice

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

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