Fig. 4.

Performance of the same set of QC material using JM-105® meters when measured by clinical end-users (squares) at two different sites and an experienced local POCT staff familiar with the QC material (circles). A,B: Results from external site 1. C,D: Results from external site 2. At the external sites, each measurement was performed by a single user operating a single meter at each site. For local POCT staff, at least two TcB meters were used. Each result (individual point) is the average of three measurements as calculated by the TcB meter. The initial result from each measurement was included. L1 TcB measurements that fell above the lower acceptable limit of the L2 target range are marked with an ‘x’ inside their square. Solid black line and corresponding error bars represent the mean ​± ​SD. Dashed lines represent the lower and upper acceptable limits of the QC range. Local POCT staff data is also included in Fig. 2, and clinical end-user data is also included in Table 3.