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Table 2 Number of food challenges with or without a significant decrease in FeNO (> 6 ppb)

From: Exhaled nitric oxide decreases after positive food-allergen challenge

Time after last antigen dose 30 min 60 min 90 min 120 min
Outcome of food challenge Pos. Neg. Pos. Neg. Pos. Neg. Pos. Neg.
ΔFeNO >6 ppb 3 5 7 4 7 4 5 2
No change in FeNO 13 30 8 33 7 33 10 31
P= 1 (n.s.) 0.003 0.005 0.08 (n.s.)
  1. Pos.: positive food challenge; Neg.: negative food challengen.s.: non significant