| Summary: | 博士 === 高雄醫學大學 === 牙醫學研究所 === 90 === The Incidence of Oropharyngeal Cancer in Taiwan
Abstract
Backgroud: Orapharyngeal cancer is the one of the most common cancers in the world. The purpose of this study was to examine the time trends of oropharyngeal cancer from 1979 to 1996 in Taiwan.
Method: Traditional cohort analysis was employed to show the birth-cohort effect of oropharyngeal cancer incidence. Age-period-cohort model analysis was used to examine the age, period, and cohort effect betw
Ethnic Differences in Oropharyngeal Cancer of Taiwan
Abstract
Background: Oropharyngeal cancer incidence of Taiwan is remarkable high in the world. But ethnic difference may exist in pattern of oropharyngeal cancer of Tawain. The purpose of this study was to examine the oropharyngeal cancer pattern among different ethnic groups of Taiwan.
Methods: The population divided into three ethnic groups, which were Fukkien, Hakka, and aboriginal communities. Standardized mortality rate ratios (SMRs), standardized incidence rate ratios (SIRs) and their ratios were estimated among these ethnic groups from 1971-1997.
Results: We found that the oropharyngeal cancer in high betel quid chewing aboriginal group was significantly higher than reference group (male: SMR=1.21, SIR=1.12; female SMR=4.3, SIR=2.62). The aboriginal groups also had an excess oropharyngeal cancer (based on SMR/SIR ratios), especially in aboriginal females. The incidence and mortality rate of oropharyngeal cancer in Hakka was significantly lower than in reference group.
Conclusion: The pattern of oropharyngeal cancer in Taiwan showed ethnic differences. Betel quid chewing might be the major etiology related with the higher oropharyngeal cancer of aboriginal groups, and the excess fatality in aboriginal groups might due to lower socioeconomic status and worse medical access, especially in females.
een intra-oral and pharyngeal cancer.
Result: A significant rising trend in oropharyngeal cancer has been seen in males. From the proportion of subsites, the major increasing subsites were on the tongue and mouth in males, and on the tongue in females. In males, we also found an increasing trend in successive cohorts born after 1929. The incidence of intra-oral cancer of male had a greater increase than pharyngeal cancer in the younger age group, recent time periods, and the late birth cohorts.
Conclusion: The increasing trend of oropharyngeal cancer incidence of Taiwan is likely to be heavily influenced by the rising consumption of alcohol and betel quid, and the effect of these etiologies was more significant on intra-oral cancer in recent periods, later cohorts, and the younger age group.
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