Statistical analyses
Continuous values were expressed as median and interquartile range (IQR) values, or in raw values with a percentage. All statistical analyses and figures were performed using GraphPad Prism version 5.3 for Windows. Mann-Whitney U tests were performed to compare non-parametric variables. Spearman’s coefficients were calculated to assess non-parametric correlations. Fisher’s exact test was used to test independence between data in a 2×2 contingency table and risk factors (relative risk: RR was expressed with the confidence interval). A p-value <0.05 was considered to be significant. Kaplan-Meier survival analyses were performed to estimate the likelihood of outgrowing FPIES by age. The non-tolerant patients were censored at the age of the last follow-up (OFC, consultation or last attempt at a phone call if contact lost, as a follow-up).