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. Author manuscript; available in PMC: 2014 Jul 18.
Published in final edited form as: J Periodontal Res. 2010 Feb;45(1):1–7. doi: 10.1111/j.1600-0765.2008.01169.x

Fig. 4.

Fig. 4

Reproducibility of the independent assessment of endotoxin activity in sera containing elevated levels of endotoxin activity. Forty-three sera with initial endotoxin activity measurements ranging from below the minimal detectable dose to > 50 EU/mL were re-analyzed in an independent assay in triplicate. (A) Bland & Altman plot of the differences in values plotted against the average difference with a 95% confidence interval for the assays. (B) Scatter plot of the 43 individual values and linear regression demonstrating the correlation. 1D, one-dimensional; 2D, two-dimensional; CI, confidence interval; Etx, endotoxin activity.