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Zeng H.-M.,National Office for Cancer Prevention and Control
Chinese Journal of Oncology | Year: 2012

Objective: Cancer is one of the leading causes of death in China. The study aimed to examine the temporal trend of cancer mortality rate during 1989-2008 in urban and rural areas of China. Methods: The mortality data of all cancers from 1989 to 2008 from National Cancer Registry database were sorted and checked. Age standardized mortality rates were calculated by the direct methods using the China population of 1982 and World Segi's population. Joinpoint regression was performed to obtain the annual percentage changes (APC) in mortality rates. The top ten cancer sites were calculated and analyzed. The mortality rates were compared with statistics of the United States. Results: From 1989 to 2008, the trend of crude cancer mortality increased with an annual percentage change (APC) of 1.0%. After age standardization, the mortality rate was significantly decreased, with an APC of -1.2%. In urban areas, lung cancer was the most common cancer of death, whereas in rural areas, stomach cancer and esophageal cancer remained top cancers of death. Especially, in both urban and rural areas, the mortality of lung cancer was on increase. The mortality rates of stomach and esophageal cancers showed a decrease in urban areas. Compared with the cancer mortality rates of the United States, the Chinese cancer mortality rate in males remained highest. The decreasing trend of cancer mortality in females of China was less obvious than that of the United States. Conclusions: The crude mortality rates of cancer in China show an increase whereas the age standardized mortality raters has declined between 1989 and 2008. Cancer is still a major public health issue threatening people's life in China. Effective intervention for cancer control and prevention is needed in the future. Source


Chen W.-Q.,National Office for Cancer Prevention and Control
Chinese Journal of Oncology | Year: 2012

Objective: Nationwide cancer incidence data were used to analyze the trends of cancer incidence in China in order to provide basic information for making cancer control strategy. Methods: We retrieved and re-sorted valid cancer incidence data from the National Central Cancer Registry Database over the 20 year-period 1989-2008. Crude incidence rate and age-standardized incidence rate were calculated for analysis. Annual percent changes in incidence for all cancers combined were estimated using Joinpoint software. Results: The cancer incidence rate in cancer registration areas was increased from 184.81/10 5 in 1989 to 286.69/105 in 2008 (from 209.33/10 5 to 307.04/105 in urban and from 176.10/105 to 269.57/105 in rural areas). Uptrends of crude cancer incidence were shown in both male and female in urban and rural areas over the 20 year-period. After standardized by age, overall incidence rate kept stable with 0.5% annual increase in urban and no change in rural areas. Since 2000, the cancer incidences in both sexes and areas were significantly increased. The incidence increased for most major cancers, especially lung cancer, colorectal cancer, female breast cancer and cervical cancer. Conclusions: Over the 20 year-period 1989-2008, cancer incidence of most cancers has been increasing by time. The incidences of gastric cancer, liver cancer and esophageal cancer still keep gradually increasing. The incidences of lung cancer, female breast cancer, colorectal cancer and cervical cancer are markedly going up, so that cancer prevention and control should be enhanced. Cancer registration will play an important role on cancer control in China along with the number of registries increasing and data quality improving. Source


Huang T.-R.,Guangxi Cancer Institute | Zhang S.-W.,National Office for Cancer Prevention and Control | Chen W.-Q.,National Office for Cancer Prevention and Control | Deng W.,Guangxi Cancer Institute | And 3 more authors.
Asian Pacific Journal of Cancer Prevention | Year: 2012

Nasopharyngeal carcinoma (NPC) is a disease with distinct ethnic and geographic distribution. The incidence of NPC in Chinese residing in Asia has declined over the last few decades, but NPC mortality trends in the entire Chinese population over time have not been systematically evaluated. In this study, we examined NPC mortality at the national level in China between 1973-2005. Mortality rates were derived from the databases of national retrospective surveys on cancer mortality conducted in the periods of 1973-1975, 1990-1992, and 2004-2005, respectively. NPC was classified according to the International classification of diseases. Age-adjusted mortality rates were calculated by direct standardization according to the world standard population. Trends in rates were evaluated by age, gender, geographic areas, and socioeconomic status. From 1973 to 2005, there was a general trend of decrease in NPC mortality in China, with higher rates in the south on a downward trend in the north. The age-standardized NPC mortality rates were 2.60 per 100,000 in 1973-1975, 1.94 per 100,000 in 1990-1992, and 1.30 per 100,000 in 2004-2005, respectively. The trend was similar in both men and women, in both urban and rural areas, but the declining rates in females were more remarkable than in males. The mortality rates were higher for the age groups above 50 years than those less than 50 years of age, both showing downward trend over 30-year period. In summary, the overall NPC mortality has consistently decreased in China over the past three decades, particularly in women and in old adults. Source


Chen W.,National Office for Cancer Prevention and Control | Zhang S.,National Office for Cancer Prevention and Control | Zou X.,National Office for Cancer Prevention and Control
Thoracic Cancer | Year: 2010

Objective: To analyze lung cancer epidemiological trends and estimate the lung cancer burden in China. Methods: The age-specific mortality/incidence ratios in different geographical areas and for both sexes for lung cancer were obtained from the National Cancer Registration database in 2004 and 2005. Cancer crude mortality rates were retrieved from the database of the third national death survey from 2004-2005. Age-specific incidence rates of lung cancer were calculated using mortality and mortality/incidence ratios. The annual percent change was estimated with a log regression model using joinpoint software analyzing pooled lung cancer incidence data from 10 cancer registries from 1988 to 2005. Results: The total estimated new lung cancer cases and deaths in 2005 were 536407 and 475768 respectively, the numbers were higher for men than for women, and show an increase of 1.63% annually from 1988 to 2005. However, the trend showed a slowdown of 0.55% after being adjusted for age. Conclusions: Lung cancer is one of the major health issues in China and the burden is getting serious. Aging is the main cause for the increasing incidence and mortality of lung cancer. Effective cancer prevention and control is imperative. Tobacco control especially should be implemented in nationwide. © Tianjin Lung Cancer Institute and Blackwell Publishing Asia Pty. Ltd. Source


Chen W.,National Office for Cancer Prevention and Control | Zhang S.,National Office for Cancer Prevention and Control | Zou X.,National Office for Cancer Prevention and Control
Chinese Journal of Lung Cancer | Year: 2010

Background and objective: The aim of this study is to analyze lung cancer epidemiological trend and estimate lung cancer burden in China. Methods: Lung cancer age specific mortality and incidence rate ratios in different areas and sexes were obtained from national cancer registration database in 2004 and 2005. Cancer crude mortalities were retrieved from the database of the third national death survey, 2004-2005. Age specific incidence rates of lung cancer were calculated using mortality and M/I ratios. Annual percent change (APC) was estimated by log regression model using Joint Point software by analyzing pooled lung cancer incidence data from 10 cancer registries from 1988 to 2005. Results: The total estimated new cases and deaths of lung cancer in 2005 were 536 407 and 475 768 which were higher in male than in female. There was 1.63% increase of lung cancer incidence per year from 1988 to 2005, however, the trend showed a slowdown by 0.55% annually after adjusted by age. Conclusion Lung cancer is one of major health issues in China and the burden is getting serious. Ageing population is main cause for increasing incidence and mortality of lung cancer. Effective cancer prevention and control is imperative. Especially, tobacco control should be carried out in statewide. Source

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