65 frozen samples from children presenting with fever without source were thawed, tested on both Kryptor and VIDAS systems, and compared using a regression analysis, a Bland-Altman difference plot, and analysis of concordance at the clinically relevant cut-off points.
Kryptor and VIDAS PCT results correlated remarkably well (r = 0.952), with no significant difference in the frequency distribution over the 3 cut-off ranges (p = 0.1384). The strength of the agreement was good (魏 = 0.759) with an overall concordance of 84.6%.
Correlation and concordance of PCT values measured by both systems were good. This finding allows clinical implementation of both techniques with the same nominal PCT cut-off values for detection of serious bacterial infection in children presenting with fever without source.