Keyphrases
Cigarette Smoking
12%
Comprehensive Meta-analysis
100%
COVID-19
100%
Current Smokers
12%
Current Smoking
12%
Epidemiology
12%
Excess Risk
12%
Former Smokers
12%
Hospitalization
25%
Infected Individual
12%
MEDLINE
12%
Meta-analysis
12%
Never-smokers
37%
Non-smokers
12%
Pooled Odds Ratios
25%
Prospero
12%
PubMed
12%
Random-effects Meta-analysis
12%
Reporting Guidelines
12%
Smokers
12%
Umbrella Review
12%
Web of Science
12%
INIS
cigarettes
12%
comparative evaluations
12%
coronaviruses
100%
death
12%
diseases
100%
epidemiology
12%
guidelines
12%
mortality
25%
patients
12%
randomness
12%
reviews
25%
risks
12%
Agricultural and Biological Sciences
Cigarettes
14%
Coronavirinae
100%
Meta-Analysis
100%
Observational Studies
14%
Odds Ratio
28%
Publications
14%
Severe Acute Respiratory Syndrome Coronavirus
14%
Spider Web
14%
Systematic Review
14%