Smoking habits and histological characteristics of oral leukoplakias in Denmark and Hungary.

The smoking habits of 345 Danish and 184 Hungarian leukoplakia patients were analysed against the histopathology of the leukoplakias, i.e. type of keratinization, epithelial thickness, epithelial dysplasia and inflammation. In spite of the reasonable size of the numbers forming the basis for the analysis, no statistically significant differences were found between smokers and non-smokers. However, it was found that the frequency of epithelial dysplasia is not higher among smokers than among non-smokers.