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Table 1 Guide to interpreting FeNO values.

From: Are exhaled nitric oxide measurements using the portable NIOX MINO repeatable?

 

FeNO (ppb)

 

Children (<12 years)

Adults (≥12 years)

Low

<5

<5

Normal

5-20

5-25

Intermediate

20-35

25-50

High

>35

>50

  1. Categories based on Taylor et al [25, 27].