Comparison of Different Blood Collection, Sample Matrix, and Immunoassay Methods in a Prenatal Screening Setting

Figure 3

Antibody array versus AutoDELFIA performance for PAPP-A. (a) Vein serum. (b) Vein DBS. (c) Finger serum. (d) Finger DBS. Solid line, Passing-Bablok regression line; shaded area, 95% confidence interval; dashed line, identity line.

(a)

(b)

(c)

(d)