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).