(Table 1 set here)
The PCR results contains nucleocapsid protein (N) gene and open reading frame (ORF) gene. N gene Ct value was 30 (18–34), and ORF gene was 33 (20–36).The median of total lung volume was 3088ml (1055–3809ml), GGO pattern was 833ml (392–1047ml) and its corresponding ratio to total lung was 30.3% (8.1%–40.3%); while the consolidation pattern was 186ml (63–316ml), the ratio was 7.2% (1.7%–11.4%); the affected lung was 1045ml (482–1359ml), and the ratio was 39% (10%–55%). ROC test results showed the area under the curve (AUC) for N gene, ORF gene, leukomonocyte count, N gene + leukomonocyte count, and ORF gene + leukomonocyte count were 0.562, 0.567, 0.703, and 0.582, respectively when adjusted with age, gender, and C reaction protein level (p <0.05 results are shown in Fig. 3).