Figure 1 Comparison of erythrocyte sedimentation rate measured with the StarrSedd and TEST 1 in a hospital population (a/c) and in patients with a paraprotein (b/d). (a and b) Passing-Bablok plots. Regression equations are shown in the graph. (c and d) Bias plots. Horizontal lines (– –) denotes 95% limits of agreement (c: –15.8 to 14.1 mm/hour and d: –65.1 to 40.1 mm/hour)