Use of the diagrams was associated to a tendency to overestimate disease severity by the inexperienced raters. This was made evident by the fact that 85.7% of the inexperienced raters showed positive location parameter (u) values (data not shown). Moreover, this trend was further confirmed by the fact that positive absolute errors were detected for most estimates (Fig. 4B). Contrarily, experienced raters using SADs were more disposed to underestimate disease severity (75% of the experienced raters showed negatives u values, data not shown). This trend was also confirmed by the fact that negative absolute errors were detected
for most estimates (Fig. 4D).