Figure 1.

Results from the campaigns in the suburb of Yaoundé (top) and in the village of Ambang Bikok (bottom), during which 188 and 69 CD4 T cell count measurements, respectively, were carried out in parallel by the Auto40 flow cytometer in mobile unit and by FACSCalibur in the Centre International de Référence Chantal Biya, Yaoundé. - Left. Passing-Bablok agreement test between the CD4 T cell count results expressed in cells/μl obtained with the Auto40 and FACSCalibur. The diagonal dotted line represents the idealline (no bias). The full line represents the regression line of the distribution; - Right. Bland-Altman analysis on the relative differences between the absolute CD4 T cell counts obtained with the Auto40 and FACSCalibur flow cytometers compared with the average absolute CD4 T cell count. The black full line represents the mean relative difference, and the other broken lines represent the superior and inferior limits of agreement. The arrow corresponds to the X abscise axis.