I've seen people on here referring to their blood test results; some mention their ESR, some mention their CRP and some mention both. I have monthly bloods, CRP is tested every time and my ESR is tested every 6 months but only upon my polite insistence.
When my disease is active, my ESR sits at between 60 and 80 but my CRP remains normal. I have been repeatedly told (because I ask repeatedly!) that the CRP blood test is more reliable. NICE guidelines seem to concur with this and recommend measuring CRP.
Patient.co.uk sums up what I have been told ; "CRP is not affected by as many other factors as the ESR, making it a better marker of some types of inflammation. Both tests are useful. However, changes in the CRP are more rapid. So, for example, a fall in the CRP within days of starting treatment for certain conditions is a useful way of knowing that treatment is working. This may be important to know when treating a serious infection or a severe flare-up of an inflammatory condition."
I don't feel that my random blood test results affects my treatment because my disease presents quite aggressively, so I am receiving good treatment. I do wonder if and how this CRP vs ESR divide affects other people and their course of RA treatments. I am interested in your opinions.