How much do patients visiting the dental clinic know about oral cancer?

Oral cancer is a serious disease that begins in the mouth, affecting areas like the lips, tongue, cheeks, and the roof or floor of the mouth. While it accounts for a small fraction of all cancers, it remains one of the most common malignancies worldwide and a leading cause of death. The most frequent type of this disease is a specific kind of tumor that grows on the lining of the mouth, and it often has a difficult path to recovery if not caught early. The risk of developing this condition is tied to several factors, including the use of tobacco and alcohol, infection with certain viruses, and even prolonged exposure to sunlight on the lips. Because the disease can be treated more successfully when found in its earliest stages, knowing what to look for and understanding the warning signs is a matter of life and death. Yet, for many people, the gap between the existence of this disease and their personal knowledge of it remains wide.

In 2023, researchers at the Babol University of Medical Sciences in Iran set out to measure just how much ordinary people know about this threat. They invited 400 patients who were visiting the university's dental school clinic to answer a series of questions. The goal was not to test them like students in a classroom, but to get a clear picture of what the general public understands about oral cancer, its causes, its symptoms, and how it spreads. The team asked these patients about their age, where they lived, how much schooling they had completed, and how often they visited a dentist. They then asked specific questions about the disease itself, such as which age groups are most at risk, whether the disease can be passed from person to person, and what specific changes in the mouth might signal trouble.

The results revealed a mixed picture of public knowledge. When the researchers scored the answers, they found that the average patient had a moderate level of awareness. About 60 percent of the participants fell into this middle category, meaning they knew some facts but missed others. A quarter of the group showed poor knowledge, while only 15 percent demonstrated a strong, comprehensive understanding of the disease. The study showed that education played a major role in what people knew. Those with a university education were significantly more likely to have a higher score than those with less schooling. Similarly, the frequency of dental visits mattered; patients who saw a dentist more often tended to know more about oral cancer than those who visited rarely.

Interestingly, the study found that age and gender did not change the outcome in the way one might expect. While older participants generally scored lower, the researchers determined this was not because of age itself, but because the older group in this specific study had lower levels of formal education on average. When education was taken into account, older people with degrees knew just as much as younger ones. Gender also made no difference; men and women had nearly identical levels of knowledge. The place where a person lived, whether in a city or the countryside, did not create a significant gap in understanding either.

When the researchers looked at specific facts, the gaps in knowledge became very clear. Most people knew that smoking and drinking alcohol increase the risk of oral cancer, likely because these warnings are common in the media. However, many were unaware that other factors, such as eating very hot or spicy foods, or not eating enough fruits and vegetables, could also raise the risk. A significant number of people did not recognize the early warning signs. Many were unsure whether a painless red or white patch inside the mouth, a sore that does not heal, or a lump that appears without pain could be early signs of cancer. In fact, the majority of participants responded that they did not know if a painless lump in the neck could be a signal of the disease.

Perhaps the most telling statistic was about screening. Only a tiny fraction of the patients, just nine people out of 400, had ever undergone a specific examination to check for oral cancer. This suggests that while people might have heard the word "cancer," they do not necessarily know that a simple check-up can find it early. The researchers noted that the media was the most common source of information for those who had heard of the disease, but this information was often incomplete. The study concludes that while the public has a baseline of awareness, it is not enough to ensure early detection. To bridge this gap, health professionals and media outlets need to provide clearer, more detailed information about the specific signs of the disease and the importance of regular check-ups, ensuring that knowledge translates into action before it is too late.