Fig. 4

Comparative analyses of HRP2, PanLDH, PfLDH, and PvLDH in DBS samples. A Linear regression scatter plots were generated from log transformed data for the WHO international standard P. falciparum and P. vivax antigens, P. falciparum culture, and clinical samples in DBS. The equation of regression line and Pearson correlation were analysed using the paired sets of data for each analyte. B Bland–Altman plots comparing the Q-Plex and xMAP assays for the aforementioned antigens. The mean difference between antigens’ concentrations (solid line) measured by the Q-Plex and xMAP and the 95% confidence interval of the difference (dotted lines) are shown. The samples in a cluster off a regression line are indicated as circles in plots and names of sample types in colors. Data from 3BD5 samples were excluded as HRP2 was absent in these samples