It is well known that smoking, chewing tobacco, and alcohol play a sig
nificant role in the etiology of oral cancer. Although this is common
knowledge in the medical community, it appears that patients are nor a
ware of this association. We performed a prospective study on all pati
ents newly diagnosed with oral cancer and a control group without any
head and neck cancer. Patients completed a questionnaire assessing the
ir awareness of these causative factors. Other parameters measured as
possible influences of patient perception included patient age, sex, s
moking status, education level, occupation, and place of residence. Pa
tients were also questioned about their knowledge of the causes of lun
g cancer to allow for comparison. A total of 134 patients were questio
ned, with 22 of the patients assigned to the oral cancer group and the
second group being comprised of 112 patients without head and neck ca
ncer. Only 20 patients (14.9%) were aware of the causative factors of
oral cancer. There was no significant difference in the knowledge of c
ausation when comparing the cancer and control group. The patient age,
sex, smoking status, or place of residence did not affect their knowl
edge of the causes of oral cancer. There was a highly significant diff
erence between patients of different education levels and occupations,
with the more educated and higher level occupations being better info
rmed about the causes of oral cancer. In contrast, the majority of pat
ients were aware of smoking as a causative factor in the development o
f lung cancer. The results from this study demonstrate a serious lack
of knowledge in the general population of known causes of oral cancer.
The relevant issues are discussed and recommendations are made.