The Interchangeability of Plasma and Whole Blood Metal Ion Measurement in the Monitoring of Metal on Metal Hips

Figure 3

The scatterplot diagrams showing regression analysis of (a) cobalt and (b) chromium concentration in whole blood and plasma. The solid line represents the regression of whole blood on plasma. The broken lines represent the confidence limits for prediction. The potentially overinfluential observations have been removed.

(a)

(b)