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Table 4 Maternal outcomes of symptomatic patients during each pregnancy period

From: Clinical characteristics of pregnant women with COVID-19 in Japan: a nationwide questionnaire survey

  1st or 2nd trimester (n = 40) 3rd trimester or puerperium (n = 18) P-value
Respiratory rate > 30/min 1 (2.5%) 3 (16.7%) 0.08
SpO2 < 93% 1 (2.5%) 3 (16.7%) 0.08
PaO2/FiO2 ratio less than 300 1 (2.5%) 0 (0%)  > 0.99
Severe respiratory symptoms 1 (2.5%) 4 (22.2%) 0.03
Oxygen administration 3 (7.5%) 7 (38.9%) 0.01
Radiologically confirmed pneumonia 3 (7.5%) 9 (50.0%)  < 0.001
  1. Data presented as n (%)
  2. SpO2 Percutaneous oxygen saturation, PaO2 Arterial oxygen partial pressure, FiO2 Inspired oxygen fraction