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Trend of morbidity and mortality of colorectal carcinoma in Nangang District of Harbin from 1992 to 2001
Xi-Wen Sun, Shu-Ling Wu, Ying-Ji Lin, Bo Wang, Hui-Li Han, Xu-Dong Dai
Xi-Wen Sun, Ying-Ji Lin, Bo Wang, Xu-Dong Dai, Institute of Cancer Research, Harbin 150040, Heilongjiang Province, China
Shu-Ling Wu, Hui-Li Han, Sanitation and Epidemic Prevention Station of Nangang District, Harbin 150001, Heilongjiang Province, China
Supported by: Medical Program Fundation of Health Department, Heilongjiang Province, No. 2002-060.
Correspondence to: Ying-Ji Lin, Institute of Cancer Research, Harbin 150040, Heilongjiang Province, China. hljcri@163.com
Received: June 16, 2004 Revised: July 9, 2004 Accepted: August 5, 2004 Published online: October 15, 2004
AIM: To determine the epidemiological characteristics of colorectal carcinoma (CRC) morbidity and mortality in Nangang District, Harbin, and to indicate the harmful effect of CRC on the people in that community.
METHODS: The data on morbidity and mortality of CRC in Nangang District (1992-2001) were sorted and coded according to ICD-9 criteria. The crude morbidity and mortality, age-standardized morbidity and mortality (adjusted by the world population), truncated morbidity and mortality (35-64 years old) as well as cumulative rates (0-65 years old) were calculated respectively. Trend u-test and u-test were adopted to analyze the preceding data. The morbidity and mortality in the near future were predicted based on Gray Modeling (GM1, 1).
RESULTS: The CRC morbidity and mortality had been significantly increasing year by year (u = 2.45, P <0.05; u = 1.97, P <0.05 respectively). The morbidity increased from 13.06/100 000 (1992-1993) to 19.37/100 000 (2000-2001) with an average of 4.83% for each year. The mortality for males and females increased from 2.83/100 000, 3.61/100 000 (1992-1993) to 9.60/100 000, 7.90/100 000 (2000-2001) with an anverage of 23.92% (u = 1.47, P >0.05) and 11.88% (u = 1.97, P <0.05) respectively. The age-standardized morbidity (adjusted by the world population) for males and females increased with a rate of 3.24% and 1.19% respectively. And the corresponding rates for mortality were 17.31% and 7.69% respectively. The cumulative and truncated morbidities were also increasing. The cumulative and truncated mortalities increased at an annual rate of 26.00%, 24.95% for males and 11.67%, 10.87 for females. The predicted morbidity and mortality were 28.15/100 000, 13.43/100 000 for males and 24.16/100 000, 20.45/100 000 for females respectively in 2006.
CONCLUSION: The morbidity and mortality of CRC have increased in 1992-2001, and will keep on increasing in the future, which are expected to reach 26.12/100 000 and 17.43/100 000 in 2006, respectively.
Key Words: N/A
Citation: Sun XW, Wu SL, Lin YJ, Wang B, Han HL, Dai XD. Trend of morbidity and mortality of colorectal carcinoma in Nangang District of Harbin from 1992 to 2001. Shijie Huaren Xiaohua Zazhi 2004; 12(10): 2302-2306
Becker et al[42]认为, 除家族肿瘤史外, 体力活动少是CRC的主要致病因素, 我们的资料与此研究结果一致. 在1992/2001年确诊的全部CRC病例中, 从事脑力劳动者约占1/3, 而从事体力劳动者仅占近1/5.
结直肠息肉与CRC的发生密切相关, 息肉切除可明显降低CRC发病率. Von Eyben et al认为从结直肠息肉至形成肿瘤的时间约为10年, Lieberman et al观察到息肉切除术自1970年广泛应用使CRC发病率下降约70%, 这种CRC发病率下降出现在1980年代中后期. 息肉切除术的广泛应用导致美国CRC发病率从1986年开始持续下降与上述假设相一致[14]. 黑人得到结直肠息肉切除术的机会明显低于白人[14-15], 这与黑人发病率没有出现白人的持续下降相吻合. 国内的一项研究[16]也证实息肉切除术可降低直肠癌发病率.
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