Fig. 6.

Loading plots from principal component analysis. (A) PC 1 vs PC 2 showed major allergen component correlation patterns in all children based on ImmunoCAP ISAC results at ages 5 and 9 years. (B) PC 3 vs PC 4 showing secondary allergen component correlation patterns. PC 3 and 4 are perpendicular to PC 1 and 2 and are the latent variables explaining the third and fourth largest variations in the dataset, respectively. Note the clustering of related components, such as the mite components, to which cosensitization is common. Coloring is used to highlight the correlation between the related components