Assessment of Antioxidant Enzyme Superoxide Dismutase (SOD) in Oral Cancer: Systematic Review and Meta-Analysis

Table 1

Literature search process.

Database	Science direct	PubMed	Wiley online library
Key words; free-text terms	“Superoxide dismutase” or “SOD”or “antioxidant”, and “oral cancer” or “OSCC.”	“Superoxide dismutase” or “SOD” or “antioxidant”, and “oral cancer” or “OSCC.”; Filter: both genders; Age: 19–44 and 45+ years	“Superoxide dismutase” or “SOD” or “antioxidant”, and “oral cancer” or “OSCC.”
Sample type	“Saliva” or “GCF”, or “serum” or “blood”	“Saliva” or “GCF”, or “serum” or “blood”	“Saliva” or “GCF”, or “serum” or “blood”
Access type	Research article	Human studies/abstract	All articles
Publication titles and subject areas	Medicine and dentistry	Clinical study/comparative/evaluation/observational studies	Oral diseases
Language	English	English	English
Duration	1998–2023	1998–2023	1998–2023