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Study characteristics

Country where the study was conducted

Study type

Review

Data Source

Size of study popopulation

Not reported number

Study population description

PubMed, Web of Science Core Collection, Embase, Cochrane and MedRxiv databases were searched through February 25, 2020.

Study population characteristics

Incidence, clinical characteristics and prognostic factor of patients with COVID-19: a systematic review and meta-analysis

Follow up type

Follow up

Results

Outcome related to coronavirus

COVID-19 (severe/critical)

Number of cases

Case definition

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)

1.730 (1.150-2.630)

Significant preventive factor

Yes

Significant risk factor

Yes

Is the risk adjusted?

Risk adjustment description

Other information

Comment

Article Quality

QC done?

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