Statistical Analysis
All statistical analyses were performed using R version 4.2.0 (R Core Team 2022). Categorical data are shown as absolute and relative frequencies; continuous data are expressed as median and range. To test if there were significant differences in sensitization patterns between patients that were allergic or tolerant to peanut, chi-squared tests were used (key basic assumptions of the test were not fulfilled regarding sensitization to hazelnut and walnut). Wilcoxon tests were performed to analyze if there were significant differences in sIgE levels between peanut-allergic and peanut-tolerant patients. P-Values were adjusted using the Bonferroni adjustment. A p-value of < 0.05 was considered to indicate a significant difference. In order to determine the probability for a positive hazelnut food challenge by Cor a 14‐sIgE and for a positive cashew food challenge by Ana o 3‐sIgE for each patient, probability curves by Beyer et al. and Lange et al. were utilized (15, 16). Since there is no probability curve available for walnut, the individual risk for a positive OFC with walnut could not be estimated.