Chin J Cancer Res

Annual cost of illness of stomach and esophageal cancer patients in urban and rural areas in China: A multi-center study

doi: 10.21147/j.issn.1000-9604.2018.04.07

Objective Stomach and esophageal cancer are imposing huge threats to the health of Chinese people whereas there were few studies on the financial burden of the two cancers. Methods Costs per hospitalization of all patients with stomach or esophageal cancer discharged between September 2015 and August 2016 in seven cities/counties in China were collected, together with their demographic information and clinical details. Former patients in the same hospitals were sampled to collect information on annual direct non-medical cost, indirect costs and annual number of hospitalization. Annual direct medical cost was obtained by multiplying cost per hospitalization by annual number of hospitalization. Annual cost of illness (ACI) was obtained by adding the average value of annual direct medical cost, direct non-medical cost and indirect cost, stratified by sex, age, clinical stage, therapy and pathologic type in urban and rural areas. Costs per hospitalization were itemized into eight parts to calculate the proportion of each part. All costs were converted to 2016 US dollars (1 USD=6.6423 RMB). Results Totally 19,986 cases were included, predominately male. Mean ages of stomach cancer and urban patients were lower than that of esophageal cancer and rural patients. ACI of stomach and esophageal cancer patients were ＄10,449 and ＄13,029 in urban areas, and ＄2,927 and ＄3,504 in rural areas, respectively. Greater ACI was associated with male, non-elderly patients as well as those who were in stage I and underwent surgeries. Western medicine fee took the largest proportion of cost per hospitalization. Conclusions The ACI of stomach and esophageal cancer was tremendous and varied substantially among the population in China. Preferential policies of medical insurance should be designed to tackle with this burden and further reduce the health care inequalities.

关键词: Cost of illness, stomach neoplasms, esophageal neoplasms, China

Liver cancer incidence and mortality in China: Temporal trends and projections to 2030

doi: 10.21147/j.issn.1000-9604.2018.06.01

ObjectiveLiver cancer is one of the most common cancers and major cause of cancer deaths in China, which accounts for over 50% of new cases and deaths worldwide. The systematic liver cancer statistics including of projection through 2030 could provide valuable information for prevention and control strategies in China, and experience for other countries.MethodsThe burden of liver cancer in China in 2014 was estimated using 339 cancer registries’ data selected from Chinese National Cancer Center (NCC). Incident cases of 22 cancer registries were applied for temporal trends from 2000 to 2014. The burden of liver cancer through 2030 was projected using age-period-cohort model.ResultsAbout 364,800 new cases of liver cancer (268,900 males and 95,900 females) occurred in China, and about 318,800 liver cancer deaths (233,500 males and 85,300 females) in 2014. Western regions of China had the highest incidence and mortality rates. Incidence and mortality rates decreased by about 2.3% and 2.6% per year during the period of 2000−2014, respectively, and would decrease by more than 44% between 2014 and 2030 in China. The young generation, particularly for those aged under 40 years, showed a faster down trend.ConclusionsBased on the analysis, incidence and mortality rates of liver cancer are expected to decrease through 2030, but the burden of liver cancer is still serious in China, especially in rural and western areas. Most cases of liver cancer in China can be prevented through vaccination and more prevention efforts should be focused on high risk groups.

关键词: Liver cancer burden, temporal trends, prediction, cancer registry, China

Evaluating efficacy of screening for upper gastrointestinal cancer in China: a study protocol for a randomized controlled trial

doi: 10.21147/j.issn.1000-9604.2017.04.02

Objective To evaluate the efficacy and feasibility of screening procedure for upper gastrointestinal cancer in both high-risk and non-high-risk areas in China. Setting Seven cities/counties, representing three economical-geographical regions (Eastern, Central and Western) in China, were selected as screening centers: three in high-risk areas and four in non-high-risk areas. Participants Villages/communities in these seven centers regarded as clusters were randomly assigned to either intervention group (screening by endoscopic examination) or control group (with normal community care) in a 1:1 ratio stratified by each center. Eligible participants are local residents aged 40–69 years in the selected villages/communities with no history of cancer or endoscopic examination in the latest 3 years who are mentally and physically competent. Those who are not willing to take endoscopic examination or are unwilling to sign the consent form are excluded from the study. Totally 140,000 participants will be enrolled. Interventions In high-risk areas of upper gastrointestinal cancer, all subjects in screening group will be screened by endoscopy. In non-high-risk areas, 30% of the subjects in screening group, identified through a survey, will be screened by endoscopy. Primary and secondary outcome measures The primary outcome is the mortality caused by upper gastrointestinal cancer. The secondary outcomes include detection rate, incidence rate, survival rate, and clinical stage distribution. Additional data on quality of life and cost-effectiveness will also be collected to answer important questions regarding screening effects. Conclusions Screening strategy evaluated in those areas with positive findings may be promoted nationally and applied to the majority of Chinese people. On the other hand, negative findings will provide scientific evidence for abandoning a test and shifting resources elsewhere. Trial registration The study has been registered with the Protocol Registration System in Chinese Clinical Trial Registry (identifier: ChiCTR-EOR-16008577).

关键词: Randomized controlled trial, screening, upper gastrointestinal cancer, evaluation, China

Cancer incidence and mortality in China, 2014

doi: 10.21147/j.issn.1000-9604.2018.01.01

Background National Central Cancer Registry of China (NCCRC) updated nationwide cancer statistics using population-based cancer registry data in 2014 collected from all available cancer registries. Methods In 2017, 449 cancer registries submitted cancer registry data in 2014, among which 339 registries’ data met the criteria of quality control and were included in analysis. These cancer registries covered 288,243,347 population, accounting for about 21.07% of the national population in 2014. Numbers of nationwide new cancer cases and deaths were estimated using calculated incidence and mortality rates and corresponding national population stratified by area, sex, age group and cancer type. The world Segi’s population was applied for age-standardized rates. Results A total of 3,804,000 new cancer cases were diagnosed, the crude incidence rate was 278.07/100,000 (301.67/100,000 in males, 253.29/100,000 in females) and the age-standardized incidence rate by world standard population (ASIRW) was 186.53/100,000. Calculated age-standardized incidence rate was higher in urban areas than in rural areas (191.6/100,000 vs. 179.2/100,000). South China had the highest cancer incidence rate while Southwest China had the lowest incidence rate. Cancer incidence rate was higher in female for population between 20 to 54 years but was higher in male for population younger than 20 years or over 54 years. A total of 2,296,000 cancer deaths were reported, the crude mortality rate was 167.89/100,000 (207.24/100,000 in males, 126.54/100,000 in females) and the age-standardized mortality rate by world standard population (ASMRW) was 106.09/100,000. Calculated age-standardized mortality rate was higher in rural areas than in urban areas (110.3/100,000 vs. 102.5/100,000). East China had the highest cancer mortality rate while North China had the lowest mortality rate. The mortality rate in male was higher than that in female. Common cancer types and major causes of cancer death differed between age group and sex. Conclusions Heavy cancer burden and its disparities between area, sex and age group pose a major challenge to public health in China. Nationwide cancer registry plays a crucial role in cancer prevention and control.

关键词: Cancer registry, incidence, mortality, epidemiology, China

Trends in geographical disparities for cervical cancer mortality in China from 1973 to 2013: a subnational spatio-temporal study

doi: 10.21147/j.issn.1000-9604.2017.06.03

Objective This study was designed to explore the time trends in geographical variations of cervical cancer mortality in mainland China over the period 1973 to 2013, to provide subnational spatio-temporal patterns for targeted promotion of human papillomavirus vaccine in China. Methods Data were extracted from three national retrospective death surveys and cancer registry. The rate ratio (RR) was estimated for the aggregated data for seven geographical regions using generalized linear models to evaluate time trends in geographical disparities of cervical cancer mortality. Results There was a significant decrease in cervical cancer mortality in China from 1973–1975 to 2004–2005, but leveled off thereafter to 2011–2013. Compared to the period 1973–1975 the RR for the three last time periods were 0.33 [95% confidence interval (95% CI): 0.30–0.37] for 1990–1992, 0.21 (95% CI: 0.19–0.24) for 2004–2005 and 0.24 (95% CI: 0.22–0.26) for 2011–2013. Females living in the Northwest China and Central China have a high risk of mortality from cervical cancer compared to the nationwide, with the RR being 2.09 (95% CI: 1.83–2.38) and 1.26 (95% CI: 1.11–1.44) respectively, while the RRs for South China, Northeast China and Southwest China were below 1.00, indicating the lower death risk. Despite the mortality rate had increased slightly from 2004 to 2013, there was an encouraging sign that the geographical disparities in cervical cancer mortality had gradually narrowed over time across China. Conclusions Although cervical cancer mortality in China has reduced to very low levels, the high risk of cervical cancer in Northwest China and Central China is still noteworthy. Public health policies including the promotion of vaccine should be targeted to further reduction of geographical disparities in cervical cancer mortality.

关键词: Cervical cancer, mortality, spatio-temporal, epidemiology, China

Comparison of cancer incidence and mortality in three GDP per capita levels in China, 2013

doi: 10.21147/j.issn.1000-9604.2017.05.02

Objective In this research, the patterns of cancer incidence and mortality in areas with different gross domestic product per capita (GDPPC) levels in China were explored, using data from population-based cancer registries in 2013, collected by the National Central Cancer Registry (NCCR). Methods Data from 255 cancer registries were qualified and included in this analysis. Based on the GDPPC data of 2014, cities/counties were divided into 3 levels: high-, middle- and low-GDPPC areas, with 40,000 and 80,000 RMB per year as cut points. We calculated cancer incidences and mortalities in these three levels, stratified by gender and age group. The national population of the Fifth Census in 2000 and Segi’s population were applied for age-standardized rates. Results The crude incidence and mortality rates as well as age-standardized incidence rate (ASIR) showed positive associations with GDPPC level. The age-standardized mortality rate (ASMR) nevertheless showed a negative association with GDPPC level. The ASMR in high-, middle- and low-GDPPC areas was 103.12/100,000, 112.49/100,000 and 117.43/100,000, respectively. Lung cancer was by far the most common cancer in all three GDPPC levels. It was also the leading cause of cancer death, regardless of gender and GDPPC level. Negative associations with GDPPC level were found for the ASIRs of lung, stomach, esophageal and liver cancer, whereas colorectal and breast cancer showed positive associations. Except for breast cancer, the ASMRs of the other five cancers were always higher in middle- and low-GDPPC areas than in high-GDPPC areas. Conclusions The economic development is one of the main factors of the heavy cancer burden on Chinese population. It would be reasonable to implement cancer control strategies referring to the local GDPPC level.

关键词: Cancer, incidence, mortality, epidemiology, GDP per capita, China

Epidemiology and trend analysis on malignant mesothelioma in China

doi: 10.21147/j.issn.1000-9604.2017.04.09

Objective Population-based cancer registration data were used to analyze the epidemiology and trend of malignant mesothelioma in China, and the result would provide basic data for its prevention and control. Methods Malignant mesothelioma data in 2013 were retrieved from the database of National Cancer Registry. Malignant mesothelioma incidence and mortality were estimated using age-specific rate by urban/rural and gender according to the national population in 2013. Malignant mesothelioma data from 22 cancer registries were used for trend analysis during 2000–2013. Results It is estimated that there were 2,041 new malignant mesothelioma cases and 1,659 malignant mesothelioma deaths occurred in 2013. The crude incidence rate in China were 1.50/10⁶ (males 1.67/10⁶, females 1.32/10⁶), age-standardized incidence rates by Chinese standard population (ASIRC) and by world standard population (ASIRW) were 1.03/10⁶ and 1.02/10⁶, respectively. The crude mortality rate in China was 1.22/10⁶ (males 1.67/10⁶, females 1.32/10⁶), age-standardized mortality rates by Chinese standard population (ASMRC) and by world standard population (ASMRW) were 0.83/10⁶ and 0.81/10⁶, respectively. There was an increasing trend of incidence rate for malignant mesothelioma in registration areas of China during 2000–2013 with annual percentage change (APC) of 2.5% [95% confidence interval (95% CI): 0.6%–4.5%]. After age standardization, no significant differences were observed. No matter for crude mortality rates or age-standardized mortality rates, no significant differences were observed during 2000–2013. Conclusions Malignant mesothelioma is the major occupational and environmental neoplasm associated with asbestos exposure. The increasing incidence trend suggests that more attention should be paid on this disease.

关键词: Malignant mesothelioma, incidence, mortality, trend, cancer registry

Association of cancer prevention awareness with esophageal cancer screening participation rates: Results from a population-based cancer screening program in rural China

doi: 10.21147/j.issn.1000-9604.2019.04.04

Objective China have implemented population-based esophageal cancer (EC) screening programs, however, the participant rates were relatively low. This study was conducted to examine the association between cancer prevention knowledge and EC screening participation rates (PRs).Methods Data in the analyses were obtained from a population-based cancer screening program in four provinces in China since 2007. In the course of 2007−2016, participants who were evaluated as high risk for EC and subsequently recommended for endoscopy examination were included in the final analysis. One-way analysis of variance test, Chi-square test and logistic regression analysis were applied.Results A total of 28,543 individuals assessed as high-risk population for EC were included in this study, with 13,036 males (45.67%) and 15,507 females (54.33%). The prevalence rates of current smoking and alcohol drinking were higher in males (58.25% and 44.22%, respectively) than in females (5.35% and 4.05%, respectively). Participants of females, and those who had older age, lower income, as well as higher education level and cancer prevention knowledge level were more likely to undergo endoscopy. Multivariable analysis showed that higher cancer prevention knowledge was associated with higher PR for endoscopic screening [adjusted odd ratio (aOR_Q4/Q1) =1.511, 95% confidence interval (95% CI): 1.398−1.632] among our study subjects. This association between cancer prevention knowledge and compliance with endoscopic screening also tends to be strong within subgroups of males, females, aged below 60 years, aged 60 years and above, and lower level of education (illiterate individuals and those with junior high education or less).Conclusions Our results displayed a positive relationship between cancer prevention knowledge and PRs for endoscopic screening, implying cancer prevention awareness being an independent influence factor for compliance with EC screening. Promoting public campaigns about comprehensive knowledge of cancer prevention seemed to be a reasonable and effective strategy to improve population PRs for EC screening.

关键词: Cancer prevention knowledge, esophageal cancer screening, participation rate, compliance

Cancer incidence and mortality in China in 2013: an analysis based on urbanization level

doi: 10.21147/j.issn.1000-9604.2017.01.01

ObjectiveTo explore the cancer patterns in areas with different urbanization rates (URR) in China with data from 255 population-based cancer registries in 2013, collected by the National Central Cancer Registry (NCCR).MethodsThere were 347 cancer registries submitted cancer incidence and deaths occurred in 2013 to NCCR. All those data were checked and evaluated based on the NCCR criteria of data quality, and qualified data from 255 registries were used for this analysis. According to the proportion of non-agricultural population, we divided cities/counties into 3 levels: high level, with URR equal to 70% and higher; median level, with URR between 30% and 70%; and low level, with URR equal to 30% and less. Cancer incidences and mortalities were calculated, stratified by gender and age groups in different areas. The national population of Fifth Census in 2000 and Segi’s population were applied for age-standardized rates.ResultsQualified 255 cancer registries covered 226,494,490 populations. The percentage of cases morphologically verified (MV%) and death certificate-only cases (DCO%) were 68.04% and 1.74%, respectively, and the mortality to incidence rate ratio (M/I) was 0.62. A total of 644,487 new cancer cases and 399,275 cancer deaths from the 255 cancer registries were submitted to NCCR in 2013. The incidence rate was 284.55/100,000 (314.06/100,000 in males, 254.19/100,000 in females), and the age-standardized incidence rates by Chinese standard population (ASIRC) and by world standard population (ASIRW) were 190.10/100,000 and 186.24/100,000 with the cumulative incidence rate (0−74 age years old) of 21.60%. The cancer mortality was 176.28/100,000 (219.03/100,000 in males, 132.30/100,000 in females), and the age-standardized mortality rates by Chinese standard population (ASMRC) and by world standard population (ASMRW) were 110.91/100,000 and 109.92/100,000, and the cumulative mortality rate (0−74 age years old) was 12.43%. Low urbanization areas were high in crude cancer incidence and mortality rates, middle urbanization areas came next to it followed by high urbanization areas. After adjusted by age, there was a U-shaped association between age-standardized incidence (ASIRC and ASIRW) and the urbanized ratio with the middle urbanization areas having the lowest ASIRC and ASIRW. Unlike with the age-standardized incidence, the sort order of age-standardized mortality (ASMRC and ASMRW) among three urbanization areas was reversed completely from the crude mortality. Lung cancer was the most common cancer in all areas of 255 cancer registries, followed by stomach cancer, liver cancer, colorectal cancer and esophageal cancer with new cases of 130,700, 76,200, 63,800, 60,900 and 50,200 respectively. Lung cancer was also the leading cause of cancer death in all areas of 255 cancer registries for both males and females with the number of deaths of 72,200 and 34,100, respectively. Other cancer types with high mortality in males were liver cancer, stomach cancer, esophageal cancer and colorectal cancer. In females, stomach cancer was the second cause of cancer death, followed by liver cancer, colorectal cancer and breast cancer.ConclusionsAlong with the development of socioeconomics associated with urbanization, as well as the aging population, the incidence and mortality keep increasing in China. Cancer burden and patterns are different in each urbanization level. Cancer control strategies should be implemented referring to local urbanization status.

关键词: Cancer, incidence, mortality, epidemiology, urbanization, China

主管单位：	中国科学院
主办单位：	中国电子学会

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