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Table 5 Mean values and reference ranges for FENO (with 95% confidence intervals), based on prediction equations for males and females. For comparison, the measured values (with 95% confidence intervals) obtained in the Study members are provided

From: Factors affecting exhaled nitric oxide measurements: the effect of sex

   Males Females
Population   F E NO (ppb) 95% C.I. F E NO(ppb) 95% C.I.
Non-smokers, non-atopic, non-asthmatic Predicted 15.6 14.1, 17.2 11.3 10.3, 12.4
  Actual 14.7 13.4, 16.1 11.2 10.3, 12.2
Non-smokers, atopic, non-asthmatic Predicted 22.6 18.3, 28.0 15.4 12.6, 18.9
  Actual 23.1 20.4, 26.2 15.6 13.9,, 17.4
Non-smokers, non-atopic, asthmatic Predicted 19.5 15.3, 24.9 12.4 9.4, 16.3
  Actual 22.5 8.0, 63.8 11.5 7.0, 18.9
Non-smokers, atopic, asthmatic Predicted 28.3 19.8, 40.5 16.9 11.5, 24.9
  Actual 30.4 23.9, 38.7 17.2 13.5, 22.1
Smokers (not smoked on the day of testing), non-atopic, non-asthmatic Predicted 12.6 9.9, 18.2 8.7 6.7, 11.3
  Actual 13.0 11.0, 15.2 9.6 7.8, 11.7
Smokers (not smoked on the day of testing), atopic, non-asthmatic Predicted 18.2 12.8, 25.5 11.8 8.2, 17.2
  Actual 17.6 14.1, 22.0 10.9 8.7, 13.8
Smokers (not smoked on the day of testing), non-atopic, asthmatic Predicted 15.7 10.7, 22.8 21.8 9.2, 51.8
  Actual 12.0 7.5, 19.5 16.0 0.3, 743.5
Smokers (not smoked on the day of testing), atopic, asthmatic Predicted 22.8 13.6, 36.9 29.8 11.3, 79.0
  Actual 24.0 17.8, 32.4 32.3 14.6, 71.2
Smokers (smoked on the day of testing), non-atopic, non-asthmatic Predicted 7.0 5.6, 8.8 6.5 5.1, 8.2
  Actual 7.3 6.4, 8.3 6.5 5.8, 7.3
Smokers (smoked on the day of testing), atopic, non-asthmatic Predicted 10.1 7.2, 14.0 8.9 6.3, 12.5
  Actual 10.2 8.8, 11.8 8.9 7.3, 10.9
Smokers (smoked on the day of testing), non-atopic, asthmatic Predicted 8.7 6.0, 12.5 8.0 3.8, 17.0
  Actual 8.9 7.3, 10.9 8.1 4.0, 16.4
Smokers (smoked on the day of testing), atopic, asthmatic Predicted 12.6 7.6, 20.3 11.0 4.6, 26.0
  Actual 9.3 6.2, 13.8 10.9 6.6, 18.0