Ethnic differences in the occurrence of oropharyngeal cancer in Taiwan.
OBJECTIVE
The purpose of this study was to examine the oropharyngeal cancer pattern among different ethnic groups in Taiwan.


METHODS
The sample population was divided into three ethnic groups: the Fukkien, Hakka, and aboriginal communities. Age-standardized mortality rates (SMRs) and age-standardized incidence rates (SIRs) were estimated among these ethnic groups for the period 1979-1996/1997.


RESULTS
Our study found that the higher oropharyngeal cancer mortality and incidence rates in females of aboriginal groups are statistically significant, and higher than reference groups for both genders (SMR=3.76, SIR=2.18). However, in the lower areca quid chewing aboriginal groups, the higher pattern was not seen in females, and the lower pattern was even found in males. The incidence and mortality rate of oropharyngeal cancer in Hakkas was significantly lower than in the reference group.


CONCLUSIONS
The pattern of oropharyngeal cancer in Taiwan showed ethnic differences. The differences may be due to variation in exposure to different risk factors; however, in our study, we found that genetic differences might also be considered when explaining the different oropharyngeal cancer patterns among ethnic groups.
Ho
P-S
PS
Faculty of Dental Hygiene, Kaoshiung Medical University, Kaoshiung, Taiwan.
Yang
Y-H
YH
Shieh
T-Y
TY
Chen
C-H
CH
Tsai
C-C
CC
Ko
Y-C
YC
D001114:Areca / Q000009:adverse effects; D005260:Female; D006801:Humans; D008297:Male; D009959:Oropharyngeal Neoplasms / Q000453:epidemiology* / Q000208:ethnology* / Q000401:mortality; D044382:Population Groups; D013624:Taiwan / Q000453:epidemiology