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Table 5 Correlations between sputum neutrophil counts in percentage and functional and inflammatory markers

From: Asthma in elderly is characterized by increased sputum neutrophils, lower airway caliber variability and air trapping

 

Spearman’s coefficient of rank correlation (rho)

95% CI for rho

p-value

RV/TLC

0.25

0.17 to 0.30

< 0.0001

FEV1/FVC

− 0.07

− 0.13 to − 0.003

0.048

FEV1, % pred

− 0.15

− 0.22 to − 0.09

< 0.0001

sGaw

− 0.08

− 0.15 to − 0.01

0.02

Asthma duration

0.08

0.00007 to 0.15

0.049

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Respiratory Research

ISSN: 1465-993X

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