3.3. Correlations and Bland-Altman analysis
The linear correlations between the results of the clinical lab and the results of the MSD multiplex immunoassay are presented in Table 2. The Bland-Altman plots, which determine the comparability of these two methods, are shown in Figure 2. For both immune-assay analyses, the allergens of cow’s milk, C. herbarum and the mixture of fungi were not included due to the lack of positives among the tested individuals (none were above 0.10 kU/L) for the MSD multiplex immunoassay (Table 2). For house dust mite no correlation was observed, and it showed also the least comparability to the ImmunoCAP assay according to the corresponding Bland-Altman plot. For the other allergens, significant correlations (r =0.829-0.978; P<0.001) were observed as well as good agreements with the SPT and ImmunoCAP assay, as shown in the corresponding Bland-Altman plots.