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Study characteristics

Country where the study was conducted

Study type

Retrospective observational study

Data Source

Size of study popopulation

1099

Study population description

552 hospitals in China between Dec 11, 2020 to Jan 29, 2020

Study population characteristics

Clinical Characteristics of Coronavirus Disease 2019 in China

Follow up type

Follow up

Results

Outcome related to coronavirus

COVID-19 (severe/critical)

Number of cases

Case definition

COVID-19 (critical)

Associated factor category

Patient characteristics

Associated factor name

Smoking

Associated factor description

Risk reference category

Not present

Number of cases in the reference category

Total number of patients in the reference category

Risk comparison category

Present

Number of cases in the comparison category

Total number of patients in the comparison category

Type of measure of association

Odds ratio

Risk value (95% confidence interval)

2.600 (1.450-4.660)

Significant preventive factor

Yes

Significant risk factor

Yes

Is the risk adjusted?

Risk adjustment description

Other information

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