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Table 3 Lung ultrasound of pregnant women on admission

From: Application of quantitative lung ultrasound instead of CT for monitoring COVID-19 pneumonia in pregnant women: a single-center retrospective study

  All Patients (n = 39) Disease type
Mild (n = 6) Common (n = 29) Severe (n = 4) P value
Lung ultrasound findings
 Normal 5 (12.8%) 5 (83.3%) 0 0 0.000
 Thickening and irregularity of pleural lines 28 (71.8%) 1 (16.7%) 23 (79.3%) 4 (100.0%) 0.009
 Increased B-lines 33 (84.6%) 1 (16.7%) 28 (96.6%) 4 (100.0%) 0.000
 Confluent B-lines 21 (53.9%) 0 17 (58.6%) 4 (100.0%) 0.002
 Small consolidations limited to the subpleural space 14 (35.9%) 0 11 (37.9%) 3 (75.0%) 0.049
 Mass consolidations characterized by dynamic air bronchograms 0 0 0 0 1.000
 Pleural effusions (The maximum depth > 1 cm) 22 (56.4%) 0 18 (69.2%) 4 (100.0%) 0.002
Involved zones detected by ultrasound
 1–2 zones 4 (10.3%) 1 (16.7%) 3 (10.4%) 0 0.711
 3–4 zones 4 (10.3%) 0 4 (13.8%) 0 1.000
 5–6 zones 14 (35.9%) 0 14 (48.3%) 0 0.027
 7–8 zones 7 (18.0%) 0 7 (24.1%) 0 0.390
 9–10 zones 2 (5.1%) 0 1 (3.5%) 1 (25.0%) 0.217
 11–12 zones 3 (7.7%) 0 0 3 (75.0%) 0.000
Lung ultrasound score 9.0 ± 6.4 0 10.6 ± 3.8 15.3 ± 2.1 <0.01