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Correlation between sputum periostin and other lower airways indices in CRS patients (n = 45).
| ρ | p value | |
|---|---|---|
| Sputum eosinophils, % | 0.44 | 0.003 |
| neutrophils, % | −0.08 | 0.59 |
| FeNOa, ppb | 0.49 | 0.001 |
| FEV1, % predicted | −0.32 | 0.0008 |
Spearman rank correlation test was adopted
Only one CRS patient with comorbid asthma failed to conduct the NO measurement because of apparatus failure.
