Tabata (2020)
The clinical characteristics of COVID-19: a retrospective analysis of 104 patients from the
Radiological finding during hospitalization (Consolidation on chest CT vs. Normal)
COVID-19 (severe/critical)
Odds ratio: 3.270 (1.150-9.300) Univariate analysis

Diamond Princess cruise ship

Retrospective cohort study

Medical records


104 patients on the Diamond Princess cruise ship with laboratory-confirmed COVID-19 hospitalised in the Self-Defense Forces Central Hospital in Japan

The patient age ranged from 25 to 93 years (median, 68 years; IQR, 46?75??75 years), and 54 (51?9%) patients were male. Most of the patients were from Eastern Asia, with Japanese and Chinese ethnicities as the majority. The range of observation period was 3??15 days (median, 10 days; IQR, 7??10 days). Fifty-two (50?0%) patients had comorbidities. Based on their presentation on the day of admission, 43 patients (41?4%) who did not display any symptoms were classified as asymptomatic, whereas 41 (39?4%) and 20 (19?2%) patients were classified to have mild and severe COVID-19, respectively.


COVID-19 (severe/critical)


Patients with severe COVID-19 Severe symptomatic cases were defined as patients showing clinical symptoms of pneumonia (dyspnea, tachypnea, peripheral capillary oxygen saturation <93%, and need for oxygen therapy). Patients with other symptoms were classified as mild cases.


Radiological finding during hospitalization

consolidation on chest CT images during hospitalization


Consolidation on chest CT

Odds ratio

3.270 (1.150-9.300)





Older age, consolidation on chest computed tomography, and lymphopenia on admission were more frequent in patients with severe COVID-19 than those with mild COVID-19 at the end of observation.