Score standard for evaluation secondary pulmonary lobular
structure
Secondary pulmonary lobular structure scores for all confirmed
cases which include lobular size sign (1 score), fusion lobular sign (1
score), interlobular septal thickening sign (1 score), intralobular
interstitial thickening sign (1 score) and intralobular vascular
thickening sign (1 score).Two senior radiologists with more than 10
years of experience each independently based on the imaging signs of
secondary pulmonary lobular structure and assessed all the cases which
include confirmed cases of COVID-19 (typical,atypical and multi-stage )
and confirmed cases of non-COVID-19.
Statistic analysis
Statistical analyses were performed with the SPSS software (version
22.0, IBM).Count index was presented as percentage, and all data were
presented as means and standard deviation (mean±SD).
Independent
sample t-test or Chi square test was used. Inter-observer agreement for
the subjective image quality was estimate using kappa statistic. P
<0.05 was considered statistically significant.