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

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

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