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Table 1 FeNO interpretation

From: Effects of specific allergen immunotherapy on biological markers and clinical parameters in asthmatic children: a controlled-real life study

Asthma FeNO (>12 years) (ppb) FeNO(<12 years) (ppb)
Control asthma <25 <20
Intermediate 25–30 25–30
Non-control asthma >50 >35