Oral infections and dental factors in relation to oral cancer : A Swedish case-control study
We investigated the role of oral infections, dentition and dental X- rays for oral cancer in a north Swedish population. This case-control study consisted of 410 cases with oral cancer for the period 1980-89 and 410 matched controls. All subjects received a mailed questionnaire. The response rates were 96% and 91% for cases and controls, respectively. The univariate analysis showed a statistically
