title: Oral cancer trends in a single head-and-neck cancer center in the  Netherlands; decline in T-stage at the time of admission.
abstract: OBJECTIVE
  In this study we evaluated the possible epidemiologic changes of oral cancer patients in the Netherlands between the years 1980-1984 and 2000-2004. We specifically studied the differences in male-female ratio, age, TNM-stage, site distribution, and alcohol and tobacco use.
  
  
  METHODS
  Patients from the VU University Medical Center with an oral squamous cell carcinoma of the oral cavity registered in 1980-1984 (n=200), group 1, were compared to patients registered in 2000-2004 (n=184), group 2. Trends in prevalence, site distribution, TNM-stage, alcohol and tobacco use, age and gender were studied.
  
  
  RESULTS
  The male-female ratio has decreased from 1.8 to 1.2. There were no differences in age between the two groups of patients. The site distribution was similar in both groups. The most commonly involved sites were the tongue and the floor of mouth. In group 2 more patients were diagnosed with a T1 tumour. There were no differences in tobacco use between the two different groups. There were much more light drinkers (0-2 drinks per day) in group 2 than in group 1, whereas there were more heavy drinkers (>4 per day) in group 1 than in group 2 (p<0.001). This was observed in both male and female patients.
  
  
  CONCLUSIONS
  In our study there were no significant differences between the patients registered in the years 1980-1984 and 2000-2004 regarding the mean age of the patients, site distribution and smoking habits. The male-female ratio has decreased. In the recent group more patients were staged T1N0 and there was a strong decrease of the patients who were heavy drinkers.
authors: Department of Oral and Maxillofacial Surgery/Pathology, VU University Medical Center (VUmc)/Academic Centre for Dentistry (ACTA), Amsterdam, The Netherlands.
authors: Manon
authors: M
authors: Weijers
authors: C René
authors: CR
authors: Leemans
authors: Irene H
authors: IH
authors: Aartman
authors: K Hakki
authors: KH
authors: Karagozoglu
authors: Isaäc
authors: I
authors: van der Waal
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000453:epidemiology* / Q000473:pathology; D005260:Female; D006258:Head and Neck Neoplasms / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000453:epidemiology* / Q000473:pathology; D009367:Neoplasm Staging; D009426:Netherlands / Q000453:epidemiology; D013997:Time Factors