3.3 Independent factors of co-infection
Table 1 summarized the results of univariate analysis. We evaluated the effect of each factor on co-infection of other respiratory pathogens among COVID-19 patients by Mann-Whitney U test, χ² test, or Fisher’s exact test. Results from multivariate Logistic regression model were shown in Table 2 . To the bacterial co-infection, sex, chest tightness and neutrophil percentage were significantly related to co-infection of bacterial pathogens. Results from multivariate Logistic regression, introduced the three above factors, revealed that over 70% of neutrophils proportion (OR: 4.563; 95%CI: 1.116-18.648) was independently factors. Moreover, according to results of univariate analysis, fever and chest tightness were significantly related to co-infection of viral pathogens, and after introducing two of them into Logistic regression model, fever (OR: 4.506; 95%CI: 1.044-19.441) and chest tightness (OR: 0.106; 95%CI: 0.015-0.743) were independent factors.