Prevalence of precancerous lesions and conditions in India: A systematic review and meta-analysis

Table 1 Quality assessment

Domain	Criteria
Examination	0-Not mentioned
	1-Others (Nurse, ENT doctor, Medical officer, Health worker etc.)
	2-by dentist
Study settings	Community setting (field); Hospital setting.
Clinical examination	0-Not mentioned
	1-Visual screening (Tongue blade, Illumination)
	2-Mouth mirror
Sampling technique	Detailed description of the sampling strategy used, type of sampling (random or non-random) was determined.
	0-Not mentioned
	1-Non-random
	2-Random sampling
Sample size adequacy	If description of sample size calculations was not done, the relative precision was calculated (assuming simple random sampling) from the study sample size and estimated proportion.
	Relative precision was ≤ 20% of the point estimate
	0-Relative precision > 20% of the point estimate
	(e.g., If the precision of a study varied from 8%-28% for different lesions and conditions in the mouth, prevalence of more than 20% was considered and score 0 was given)