| a population-based case-control investigation on cancers of the oral cavity in bangalore, india. | a case-control study on cancers of the oral cavity was conducted by utilising data from the population based cancer registry. bangalore, india. three hundred and forty-eight cases of cancers of the oral cavity (excluding base tongue) were age and sex matched with controls from the same residential area but with no evidence of cancer. the relative risk due to pan tobacco chewing was elevated in both males and females, being appreciably higher in the latter (relative risk 25.3%; 95% confidence int ... | 1990 | 2245179 |