Table 2.
List of criteria of the forced spirometry curve explored by the CDSS.
| Forced spirometry curve | Criteriai |
| BEVa trad | Back extrapolation >0.15 L or < 5% of FVCg |
| EOTVb trad | End of test criteria, volume < 0.025 L in time ≥1 s |
| Texc | Time of end FVCg(Tex>6 s) |
| EOTVb new (5 criteria) | a) EOTVb< 0.025 L or Texc>6 s; b) If Texc>6 s EOTVb<0.025 L in time 0.5 s; c) If Texc>6 s, EOTVb< 0.1 L; d) EOTVb(Texc) < 0.025 L; and e) EOTVb< 0.025 * Tex/6 L |
| Peak_Valley_Single | High local maximum (peak) and minimum (valley) in FVecurve |
| Peak_Valley_Combined | High local maximum (peak) and minimum (valley) in FVecurve close to FEV1 h |
| VTd end | Irregularity or oscillation at the end of FTmcurve |
| FVe_slope_single | Variation of FVeslope or high FVeslope |
| FVe_slope_combined | Variation of FVeslope and high FVeslope |
| FVeSlope_Test_Combo | Irregularity and variation of FVeslope or high FVeslope |
| FVeSlope_Test_Combo_Area Under Rectj | Irregularity or variation of FVeslope and high FVeslope |
| FVeSlope_Test_Combo4 | Irregularity and variation of FVeslope and high FVeslope |
| Diff_singlek | Irregular concavity-convexity before the PEFfvalue in FVecurve |
| Diff_combinedl | Irregular slope and irregular concavity-convexity before the PEFfvalue in FVecurve |
| PEFf TimeUp | Time to archive PEFf< 130 milliseconds |
| PEFf TimeDown | Time to archive PEFf> 0.25 milliseconds |
| PEFf Cut | PEFfis not a peak in FVecurve (is plane), volume (Fn=PEFf) > 15 % FVCg |
| PEFf Cut2 FEV1 h | PEFfis not a peak in FVecurve (is plane), volume (Fn=PEFf) > 17.5 % FEV1 h |
| PEFf DoublePeak | PEFfbimodal in FVecurve |
| PEFf Slow | Volume to archive PEFf< 20% FVCg |
aBEV = back extrapolation
bEOTV = end of test criteria, volume
cTex = Time to end FVC
dVT = volume/time curve
eFV = flow/volume curve
fPEF = peak expiratory flow
gFVC = forced vital capacity
hFEV1= forced expiratory volume in the first second
iThe list includes the classical parameters used by ATS/ERS guidelines [11].
jRect = rectum
kDiff single= irregular concavity-convexity before the PEFf value in flow volumen curve concavity or convexity exists if the extracted signal metric
lDiff_combined = irregular slope and irregular concavity-convexity before the peak expiratory flow value in flow volume curve
mFT = flow/time curve
nF=flow