Normal ranges

• Upper limits of normal increase by 5-10mm/h for patients >65 years.

• Other factors e.g. Hct influence the ESR.

• Should be regarded as semiquantitative.

• Marked elevations are clinically significant.

• Modest elevations can be more problematic to interpret.

The main advantages to the ESR are its low cost and technical simplicity allied to the absence of a more accurate, inexpensive and technically simple alternative.

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