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Table 2 Correlations between the pulmonary function test and oscillometry values

From: The impact of respiratory reactance in oscillometry on survival in patients with idiopathic pulmonary fibrosis

 

VC

%VC

FVC

%FVC

FEV1

FEV1/FVC

aDLCO

a%DLCO

R5 Whole breath

–0.350*

–0.134

–0.349*

–0.123

–0.431*

–0.127

–0.110

0.007

R5 Ex

–0.321*

–0.084

–0.322*

–0.083

–0.408*

–0.132

–0.082

0.033

R5 In

–0.340*

–0.159#

–0.334*

–0.140

–0.411*

–0.133

–0.144

–0.035

ΔR5

–0.166#

0.028

–0.174#

–0.004

–0.240*

–0.099

–0.054

0.010

R20 Whole breath

–0.341*

–0.126

–0.340*

–0.111

–0.429*

–0.144

–0.065

0.035

R20 Ex

–0.336*

–0.090

–0.338*

–0.082

–0.430*

–0.143

–0.055

0.049

R20 In

–0.294*

–0.134

–0.288*

–0.108

–0.365*

–0.144

–0.069

0.013

ΔR20

–0.202*

0.002

–0.214*

–0.040

–0.276*

–0.077

–0.042

0.027

R5–R20 Whole breath

–0.276*

–0.146

–0.276*

–0.154#

–0.311*

–0.028

–0.144

–0.037

R5–R20 Ex

–0.209*

–0.079

–0.210*

–0.091

–0.243*

–0.032

–0.096

–0.002

R5–R20 In

–0.316*

–0.204*

–0.313*

–0.205*

–0.351*

–0.026

–0.213*

–0.109

ΔR5–R20

–0.017

0.086

–0.016

0.083

–0.059

–0.099

0.043

0.076

X5 Whole breath

0.687*

0.592*

0.669*

0.592*

0.663*

–0.245*

0.439*

0.329*

X5 Ex

0.568*

0.470*

0.553*

0.473*

0.579*

–0.146

0.310*

0.212*

X5 In

0.741*

0.673*

0.722*

0.669*

0.684*

–0.326*

0.505*

0.395*

ΔX5

–0.259*

–0.294*

–0.259*

–0.291*

–0.159#

0.326*

–0.216*

–0.221*

Fres Whole breath

–0.652*

–0.617*

–0.635*

–0.622*

–0.614*

0.285*

–0.426*

–0.315*

Fres Ex

–0.557*

–0.517*

–0.541*

–0.524*

–0.540*

0.215*

–0.322*

–0.218*

Fres In

–0.700*

–0.683*

–0.684*

–0.682*

–0.643*

0.341*

–0.494*

–0.386*

ΔFres

0.198*

0.226*

0.204*

0.227*

0.130

–0.238*

0.221*

0.235*

ALX Whole breath

–0.685*

–0.600*

–0.669*

–0.603*

–0.658*

0.263*

–0.434*

–0.321*

ALX Ex

–0.574*

–0.489*

–0.560*

–0.495*

–0.578*

0.171#

–0.317*

–0.216*

ALX In

–0.740*

–0.682*

–0.723*

–0.681*

–0.680*

0.342*

–0.510*

–0.396*

ΔALX

0.345*

0.371*

0.342*

0.360*

0.239*

–0.367*

0.249*

0.240*

  1. The values in the table are the correlation coefficients
  2. ALX Low-frequency reactance area, Δ Difference between expiratory and inspiratory phases, DLCO Diffusing capacity of the lung for carbon monoxide, %DLCO Diffusing capacity of the lung for carbon monoxide (% predicted), Ex Expiratory phase, FEV1 Forced expiratory volume in 1 s, Fres Resonant frequency, FVC Forced vital capacity, %FVC Forced vital capacity (% predicted), In Inspiratory phase, R5 Resistance at 5 Hz, R20 Resistance at 20 Hz, R5–R20 Difference between R5 and R20, VC vital capacity, X5 Reactance at 5 Hz
  3. *p-value < 0.01
  4. #p-value < 0.05
  5. aDLCO was measured in 161 cases
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BMC Pulmonary Medicine

ISSN: 1471-2466

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