HHE 2018 | Page 139

evaluation 71 36 31 20 12 12 10 5 5 89.8 % 98.1% 80.0% 70.4% 94.4% 100.0% every subscheme, at least 70% of the participants were successful according to the pre-defined criteria. For the EGFR and ROS1 FISH subschemes, the percentage of successful participants was the lowest, in concordance with the higher number of laboratories analysing at least one of the samples incorrectly. On sample and laboratory levels, more technical failures were observed for ROS1 compared with other markers. Although reporting scores were all above 80% (Table 1), only 43–52% of the participants were able to correctly include the clinical interpretation of the analysis result, depending on the marker of interest. Discussion Our results demonstrate decreased error and technical failure rates