TABLE 2.
Within-patient absolute agreement between tremoFlo and MasterScreen impulse oscillometry system (IOS) values
| Patients n | tremoFlo kPa·L−1·s−1 | IOS kPa·L−1·s−1 | tremoFlo versus IOS ICC (95% CI) | |||
| Mean±sd | Median (IQR) | Mean±sd | Median (IQR) | |||
| Resistance# | ||||||
| R5 | 38 | 0.80±0.35 | 0.71 (0.34) | 0.82±0.31 | 0.72 (0.34) | 0.91 (0.83–0.95) |
| R10 | 38 | 0.74±0.30 | 0.67 (0.28) | 0.66±0.21 | 0.60 (0.26) | 0.91 (0.82–0.95) |
| R15 | 38 | 0.63±0.25 | 0.57 (0.25) | 0.60±0.17 | 0.54 (0.22) | 0.90 (0.80–0.95) |
| R20 | 38 | 0.59±0.22 | 0.53 (0.26) | 0.56±0.15 | 0.52 (0.19) | 0.88 (0.77–0.94) |
| R25 | 38 | 0.56±0.20 | 0.51 (0.24) | 0.55±0.15 | 0.51 (0.21) | 0.91 (0.82–0.95) |
| R5–20 | 38 | 0.21±0.18 | 0.18 (0.17) | 0.26±0.21 | 0.23 (0.19) | 0.83 (0.68–0.91) |
| Reactance# | ||||||
| X5 | 38 | −0.36±0.20 | −0.31 (0.16) | −0.19±0.14 | −0.18 (0.14) | 0.75 (0.52–0.87) |
| X10 | 38 | −0.18±0.17 | −0.13 (0.16) | −0.16±0.13 | −0.14 (0.15) | 0.82 (0.66–0.91) |
| X15 | 38 | −0.17±0.16 | −0.12 (0.12) | −0.10±0.11 | −0.09 (0.14) | 0.87 (0.76–0.93) |
| X20 | 38 | −0.09±0.14 | −0.06 (0.11) | −0.02±0.08 | −0.01 (0.09) | 0.78 (0.58–0.89) |
| X25 | 38 | 0.002±0.123 | 0.02 (0.12) | 0.06±0.06 | 0.05 (0.09) | 0.69 (0.40–0.84) |
| X5–20 | 38 | −0.27±0.09 | −0.25 (0.09) | −0.17±0.13 | −0.19 (0.17) | 0.70 (0.42–0.84) |
| AX¶ | 38 | 3.25±2.92 | 2.40 (2.31) | |||
| Fres+ | 26 | 19.64±4.59 | 21.67 (6.01) | 18.46±3.65 | 19.25 (3.86) | 0.63 (0.38–0.82) |
IQR: interquartile range; ICC: intraclass correlation coefficient; AX: area under the curve for resistance; Fres: resonant frequency. #: R represents resistance and X represents reactance at various oscillatory frequencies, including the frequency dependency between R or X parameters measured at 5–20 Hz; ¶: only available on the tremoFlo, such that no agreement was examined with the IOS; +: reported only for patients in whom it was ≤25 Hz, to avoid extrapolation of data.