title: Incidence of oral leucoplakias among 20,358 Indian villagers in a 7-year period.
abstract: A group of 20,358 villagers in two districts of India has been followed for 7 years to study the incidence of oral leucoplakia. The follow-up rate of the population in two districts ranged from 61% to 71%. In one of the districts (Bhavnagar) no new cases of leucoplakia were found among females in the 7-year period. Among males 105 cases developed (4-0/1000/year). The incidence was highest among hookli (clay pipe) smokers. In the Ernakulam district the incidence among males was 3-3/1000/year whereas among females it was 1-9/1000/year. The mixed habits group had the highest incidence of oral leucoplakias (7-2 and 9-9/1000/year among males and females respectively).
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001114:Areca; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007194:India; D007972:Leukoplakia, Oral / Q000453:epidemiology*; D008297:Male; D008409:Mastication; D008875:Middle Aged; D010946:Plants, Medicinal; D012737:Sex Factors; D012907:Smoking