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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.