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. 2021 Jul;13(7):4418–4426. doi: 10.21037/jtd-21-25

Table 2. Fraction of exhaled nitric oxide (FeNO) values detected by NIOX and RuiBreath devices.

n NIOX RuiBreath P value
ALL 197 28 [18–51] 30 [21–50] 0.016
FeNONIOX <25 85 16 [12 –21] 20 [15–24] <0.001
FeNONIOX 25–49 58 33 [28–40] 33 [29–41] 0.125
FeNONIOX 50–99 37 64 [53–83] 67 [51–77] 0.456
FeNONIOX ≥100 17 118 [106–160] 118 [98–149] 0.017

Data are presented as median (25th–75th percentile).