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Table 4 Diagnostic accuracy of Fractional exhaled nitric oxide (FeNO) for atopy

From: Role of exhaled nitric oxide as a predictor of atopy

 

Sensitivity %

Specificity %

PPV %

NPV %

AUC% (95% CI)

FeNO > 20 ppb

47.8

81.5

69.1

64.4

68 (64–69)

FeNO > 25 ppb

52.2

71.7

61.4

63.4

67 (64–70)

FeNO > 35 ppb

47.1

74.7

61.7

62.0

66 (63–69)

By asthma status (FeNO > 20 ppb)

   Non-asthmatics

37.7

84.8

66.1

62.9

65 (61–69)

   Asthmatics

87.5

52.0

82.4

61.9

82 (71–91)