CIs | Confidence intervals |
EPHPP | Effective Public Health Practice Project |
HNCs | Head and neck cancers |
HN | Head and neck |
ICD | International classification of disease |
MOOSE | Meta-analysis of Observational Studies in Epidemiology |
N | Number of studies |
OCs | Oral cancers |
OR | Odds ratio |
PRISMA | Preferred Reporting Items for Systematic Review and Meta-Analysis |
UADT | Upper aerodigestive tract |