| Colorectal carcinoma among ethnic Chinese in Singapore: trends in incidence rate by anatomic subsite from 1968 to 1992. | |
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MedLine Citation:
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PMID: 10375097 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Recent epidemiologic studies have suggested that the anatomic distribution of colorectal carcinoma may have undergone a distal to proximal shift over several decades, which has been attributed variously to environmental and genetic factors as well as preventive intervention. METHODS: Trends in subsite distribution and the incidence rate of colorectal carcinoma among Chinese in Singapore between 1968 and 1992 were explored using data from the Singapore Cancer Registry (n = 10,489). Age-standardized incidence rates were computed and compared further using age-period-cohort models by subsite and gender. RESULTS: The proportion of lesions in the distal colon was found to have increased from 23.2% to 24.4% whereas that for the proximal colon and rectum were fairly consistent over the past 25 years. Our results also showed that age-standardized rates have doubled in proximal lesions (2-3% annually) and more than doubled in distal lesions (3-4% annually) whereas rates in rectal carcinoma have shown a slight increase or stability over time. The patterns of change in all subsite tumors could be attributed to a significant birth cohort effect. CONCLUSIONS: The results of the current study suggest that incidence rates have increased rapidly with no distal to proximal shift observed among ethnic Chinese in Singapore over the past 25 years. The pattern of change differs from findings reported in high incidence countries such as the U. S. and parts of Europe, suggesting that the preventive intervention and early diagnostic capabilities that may have played an important role in these countries have had less effect in Asia. The rapid overall increase in the incidence rate of colon carcinoma supports the role of dietary and other environmental factors as possible risk factors. |
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Authors:
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J Huang; A Seow; C Y Shi; H P Lee |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Cancer Volume: 85 ISSN: 0008-543X ISO Abbreviation: Cancer Publication Date: 1999 Jun |
Date Detail:
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Created Date: 1999-06-30 Completed Date: 1999-06-30 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0374236 Medline TA: Cancer Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 2519-25 Citation Subset: AIM; IM |
Affiliation:
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Department of Community, Occupational and Family Medicine, Faculty of Medicine, National University of Singapore, Singapore. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Carcinoma / epidemiology, ethnology* China / ethnology Colorectal Neoplasms / epidemiology, ethnology* Diet Environment Female Humans Incidence Male Middle Aged Risk Factors Singapore / epidemiology |
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