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Table 4 Correlation coefficient and significance level of the analysis including FOT, compartmental model and plethysmographic exams

From: Forced oscillations and respiratory system modeling in adults with cystic fibrosis

 

TLC (L)

TLC (%)

FRC (L)

FRC (%)

RV (L)

RV (%)

RV/TLC

RV/TLC (%)

FRC/TLC

Raw (cmH 2 O/L/s)

SGaw (cmH 2 O −1s −1 )

FOT Parameters

           

R0 (cmH2O/L/s)

ns

ns

ns

ns

0.33*

0.36**

0.50***

0.48***

0.30*

0.56****

−0.52***

R4 (cmH2O/L/s)

ns

ns

ns

ns

0.29*

0.33*

0.46***

0.44**

ns

0.54****

−0.51***

S (cmH2O/L/s2)

ns

ns

−0.33*

−0.46***

−0.55****

−0.58****

−0.66****

−0.67****

−0.50***

−0.66****

0.52***

fr (Hz)

ns

ns

ns

ns

0.36*

0.37**

0.58****

0.56****

0.41**

0.61****

−0.56****

Xm (cmH2O/L/s)

ns

ns

−0.36*

−0.45**

−0.57****

−0.59****

−0.69****

−0.69****

−0.54****

−0.65****

0.54****

Ax (cmH2O/L)

ns

ns

0.32*

0.45**

0.54****

0.56****

0.67****

0.66****

0.53****

0.64****

−0.49***

Cdyn (L/cmH2O)

0.34*

ns

ns

ns

−0.38**

−0.42**

−0.61****

−0.59****

−0.33*

−0.57****

0.38**

Zrs (cmH2O/L/s)

ns

ns

0.29*

0.42**

0.53****

0.57****

0.69****

0.67****

0.48***

0.64****

−0.53****

Compartmental model

           

R (cmH2O/L/s)

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

Rp (cmH2O/L/s)

ns

ns

0.35*

0.46***

0.52***

0.54****

0.60****

0.61****

0.52***

0.64****

−0.49***

Rt (cmH2O/L/s)

ns

ns

ns

ns

0.30*

0.33*

0.42**

0.41**

ns

0.47***

−0.44**

I (cmH2O/L/s2)

ns

ns

−0.28*

ns

ns

ns

−0.29*

−0.30*

ns

−0.38**

0.38**

C (mL/cmH2O)

0.31**

ns

ns

ns

−0.42**

−0.45**

−0.65****

−0.64****

−0.41**

−0.58****

0.43**

  1. FOT: Forced Oscillation Technique; ns: Non-significant; *p < 0.05; **p < 0.01; ***p < 0.001 and ****p < 0.0001.