Trends in Lip Cancer Incidence in Vaud, Switzerland
Author Information
Author(s): F. Levi, C. La Vecchia, V.-C. Te, S. Franceschi
Primary Institution: Registre vaudois des tumeurs, Institut universitaire de medecine sociale et preventive
Hypothesis
The study investigates the trends in lip cancer incidence in the Swiss Canton of Vaud from 1975 to 1990.
Conclusion
The study found a significant decline in lip cancer incidence in both males and females over the study period.
Supporting Evidence
- The incidence rates of lip cancer declined from 1.8 to 0.6 per 100,000 males and from 0.14 to 0.02 per 100,000 females.
- The decline in lip cancer rates was significant for males and both sexes combined.
- Trends were not due to changes in registration or classification criteria.
Takeaway
This study shows that fewer people are getting lip cancer in Vaud, Switzerland, likely because they are spending less time in the sun and smoking less.
Methodology
Data were collected from the Vaud Cancer Registry, which includes demographic characteristics and tumor details.
Limitations
The study is limited to a specific geographic area and time period, which may not represent trends in other regions.
Participant Demographics
The study included 76 males and 11 females aged 35 and older.
Statistical Information
P-Value
<0.01
Statistical Significance
p<0.05
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