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Country where the study was conducted

Study type

Review

Data Source

Size of study popopulation

5 studies, 1399 pati

Study population description

Medline (PubMed interface), Scopus and Web of Science searched through March 9, 2020, without language restriction

Study population characteristics

Active smoking is not associated with severity of coronavirus disease 2019 (COVID-19)

Follow up type

Follow up

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)

1.690 (0.410-6.920)

Significant preventive factor

Significant risk factor

Is the risk adjusted?

Risk adjustment description

Comment

Article Quality

QC done?

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