Forced oscillations and respiratory system modeling in adults with cystic fibrosis

Table 3 Correlation coefficient and significance level of the analysis including FOT, compartmental model and spirometric exams

	FVC (L)	FVC (%)	FEV ₁ (L)	FEV ₁ (%)	FEV ₁ /FVC	FEF _25–75% (L/s)	FEF _25–75% (%)	FEF/FVC
FOT parameters
R0 (cmH₂O/L/s)	−0.48**	ns	−0.58*	−0.44*	−0.53**	−0.55**	−0.50**	−0.48**
R4 (cmH₂O/L/s)	−0.51***	−0.41**	−0.66****	−0.61****	−0.64****	−0.68****	−0.66****	−0.61****
S (cmH₂O/L/s²)	0.61***	0.56**	0.74****	0.74****	0.79****	0.72****	0.73****	0.70****
fr (Hz)	−0.63***	−0.48*	−0.73****	−0.64**	−0.65**	−0.69***	−0.67**	−0.61**
Xm (cmH₂O/L/s)	0.69****	0.63****	0.78****	0.74****	0.77****	0.69****	0.69****	0.68****
Ax (cmH₂O/L)	−0.59****	−0.59****	−0.72****	−0.74****	−0.76****	−0.65****	−0.66****	−0.63****
Cdyn (L/cmH₂O)	0.80****	0.65***	0.81****	0.71***	0.59*	0.70****	0.64***	0.56**
Zrs (cmH₂O/L/s)	−0.69****	−0.53**	−0.76****	−0.66***	−0.70****	−0.67**	−0.63***	−0.60**
Compartmental model
R (cmH₂O/L/s)	ns	ns	ns	ns	ns	ns	ns	ns
Rp (cmH₂O/L/s)	−0.50***	−0.55****	−0.64****	−0.70****	−0.74****	−0.59****	−0.60****	−0.59****
Rt (cmH₂O/L/s)	−0.43**	−0.35*	−0.59****	−0.56****	−0.63****	−0.62****	−0.61****	−0.58****
I (cmH₂O/L/s²)	ns	ns	0.32*	ns	0.51****	0.36**	0.40**	0.44**
C (mL/cmH₂O)	0.76****	0.68****	0.79****	0.74****	0.60****	0.67****	0.63****	0.52****

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

ISSN: 1475-925X