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.