Table 2. Meta-analyses with pleural and non-pulmonary parenchymal abnormalities.

Study	Number of studies	Number of patients	Positive CT scans as defined by studies (%)	Pleural thickening (%)	Pleural retraction (%)	Pleural effusion (%)	Pericardial effusion (%)	Mediastinal lymphadenopathy (%)
Bao et al. (20)	13	2,738	89.76	52.46	NS	5.88	4.55	3.38
Zhu et al. (21)	34	4,124	91.6	27.1	NS	5.3	NS	5.4
Ojha et al. (22)	45	4,410	NS	41.7	56.5	5	3.6	5.4
Adams et al. (17)	28	3,466	89.4	34.7	NS	5.2	2.7	5.1
Xie et al. (23)	90	16,526	95.9	29.8	NS	4.2	4.4	2.9

CT, computed tomography; NS, not specified.