Forced oscillations and respiratory system modeling in adults with cystic fibrosis

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

	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 ⁻¹ s ⁻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**

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

ISSN: 1475-925X