Figure 3 | Scientific Reports

Figure 3

From: Assessment of a dried blood spot C-reactive protein method to identify disease flares in rheumatoid arthritis patients

Figure 3

Deming regression method comparison analysis. Weighted Deming regression analysis comparing the measurement of CRP using the two different sampling methods across n = 100 RADAR study participants. Graphs compare systematic differences between immunoturbidimetry analysis of whole blood (Hosp. Ref.) and ELISA testing of dried blood spot (A,B; DBS EL) and plasma (C,D; Plasma EL), at baseline and 6 weeks. The red line represents the Deming regression line, the black line represents a simple linear regression line and the red shaded area the 95% confidence intervals. (E) The statistical parameters summarised from the Deming regression analysis compare systematic differences between immunoturbidimetry analysis of whole blood (Hosp. Ref.) and ELISA testing of dried blood spot (DBS EL) and plasma (Plasma EL), at baseline and 6 weeks. (F) Spearman correlation coefficients for each sample data comparison. Cl confidence limits of mean difference; SE standard error.

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