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Table 1 Clinical data of the negative food challenge (NFC) and positive food challenge (PFC) groups in the challenge test

From: Predictive value of IgE/IgG4 antibody ratio in children with egg allergy

  NFC PFC p value
Number of patients 45 60  
Age (y), median (range) 4 (1–13) 5 (1–12) 0.06389*
Male/female (n) 30/15 34/26 0.4024*
Frequency of allergic symptoms at accidental ingestion    
Once (n) 35 37 0.067**
2–10 times (n) 3 14  
10 times (n) 7 9  
Frequency of anaphylaxis at accidental ingestion (n) 4/45 16/60 0.025*
Duration since last episode (y; mean [SD]) 3.2 (2.2) 3.4 (1.7) 0.3162*
Condition of elimination    
Complete 38 51 0.844*
Partial# 7 9  
  1. *, The χ2 test (2-tailed) was used; **, The Kruskal-Wallis rank test was used; ***, The Mann–Whitney U test (2-tailed) was used.
  2. #: After the patients ate egg products or less than 1 g of heated eggs, complete elimination was performed before the challenge test.