Long-term trends in Indigenous deaths from chronic diseases in the Northern Territory: a foot on the brake, a foot on the accelerator

OBJECTIVE: To examine trends in Northern Territory Indigenous mortality from chronic diseases other than cancer. DESIGN: A comparison of trends in rates of mortality from six chronic diseases (ischaemic heart disease [IHD], chronic obstructive pulmonary disease [COPD], cerebrovascular disease [CVD], diabetes mellitus [DM], renal failure [RF] and rheumatic heart disease [RHD]) in the NT Indigenous population with those of the total Australian population. PARTICIPANTS: NT Indigenous and total Australian populations, 1977-2001. MAIN OUTCOME MEASURES: Estimated average annual change in chronic disease mortality rates and in mortality rate ratios. RESULTS: Death rates from IHD and DM among NT Indigenous peoples increased between 1977 and 2001, but this increase slowed after 1990. Death rates from COPD rose before 1990, but fell thereafter. There were non-significant declines in death rates from CVD and RHD. Mortality rates from RF rose in those aged > or = 50 years. The ratios of mortality rates for NT Indigenous to total Australian populations from these chronic diseases increased throughout the period. CONCLUSIONS: Mortality rates from IHD and DM in the NT Indigenous population have been increasing since 1977, but there is evidence of a slower rise (or even a fall) in death rates in the 1990s. These early small changes give reason to hope that some improvements (possibly in medical care) have been putting the brakes on chronic disease mortality among Aboriginal and Torres Strait Islander peoples.     

Stage at diagnosis and cancer survival for Indigenous Australians in the Northern Territory

OBJECTIVE: To investigate whether Indigenous Australians with cancer have more advanced disease at diagnosis than other Australians, and whether late diagnosis explains lower Indigenous cancer survival rates. DESIGN: Retrospective cohort study. SETTING AND PARTICIPANTS: Indigenous and non-Indigenous people diagnosed with cancers of the colon and rectum, lung, breast or cervix and non-Hodgkin lymphoma in the Northern Territory of Australia in 1991-2000. MAIN OUTCOME MEASURES: SEER summary stage of cancer at diagnosis (local, regional or distant spread), cause-specific cancer survival rates and relative risk of cancer death. RESULTS: Diagnosis with advanced disease (regional or distant spread) was more common for Indigenous people (70%; 95% CI, 62%-78%) than for non-Indigenous people (51%; 95% CI, 53%-59%) with cancers of the colon and rectum, breast, cervix and non-Hodgkin lymphoma, but for lung cancer the opposite was found (Indigenous, 56% [95% CI, 46%-65%] v non-Indigenous, 69% [95% CI, 64%-75%]). Stage-adjusted survival rates were lower for Indigenous people for each cancer site. With few exceptions, the relative risk of cancer death was higher for Indigenous people for each category of stage at diagnosis for each cancer site. CONCLUSIONS: Health services apparently could, and should, be performing better for Indigenous people with cancer in the Northern Territory, and probably elsewhere in Australia. This study has demonstrated that data from cancer registers, enhanced with data on stage at diagnosis, can be used to monitor health service performance for Indigenous Australians in the Northern Territory; similar data is available in other States, and could be used to monitor health service performance for Indigenous people throughout Australia.     

The health of urban Aboriginal people: insufficient data to close the gap

The Australian Government has committed to reducing Indigenous disadvantage, including closing the life-expectancy gap within a generation, and to halving the gap in mortality rates for children under 5 years of age within a decade. Sixty per cent of the health gap between Indigenous and non-Indigenous Australians is attributable to the health of Indigenous people living in non-remote areas of Australia. We conducted a brief review of recent Australian original research publications on the health of the 53% of Indigenous people who live in urban areas, and found that data are sparse; there were only 63 studies in the past 5 years (11% of all articles about Indigenous health during this period). Although Indigenous Australians living in remote areas experience greater health disparity, the government will not achieve its aims without paying due attention to the non-remote-living population. More research is required, and particularly research that actually tests the impact of policies and programs.     

HIV and AIDS in aboriginal and Torres Strait Islander Australians: 1992-1998. The National HIV Surveillance Committee

OBJECTIVE: To describe the epidemiological pattern of newly diagnosed HIV infection and AIDS among Indigenous Australians. DESIGN AND SETTING: National surveillance for newly diagnosed HIV infection and AIDS in Australia. Information on Indigenous status was sought at HIV/AIDS notification in all State/Territory health jurisdictions, except the Australian Capital Territory, and Victoria before June 1998. MAIN OUTCOME MEASURES: Number of people with newly diagnosed HIV per year and population rate of HIV diagnosis; demographic characteristics of people with HIV and AIDS diagnoses by Indigenous status. RESULTS: From 1992 to 1998, 127 Indigenous Australians were newly diagnosed with HIV infection and 55 were diagnosed with AIDS. The population rate of HIV diagnosis among Indigenous Australians (5.23/100,000 per year) was similar to that among non-Indigenous Australians (5.51/100,000 per year). The annual number of HIV diagnoses among Indigenous people was relatively stable, but among non-Indigenous people it declined steadily over time. A higher proportion of Indigenous people diagnosed with HIV were women (26.8% v 8.9%; P < 0.001). Although male homosexual contact was the predominant source of exposure for both Indigenous (46.7%) and non-Indigenous (75.0%) people with HIV infection, exposure by heterosexual contact (36.7% v 15.3%; P < 0.001) was reported more frequently among Indigenous people. CONCLUSION: Although HIV incidence was similar among Indigenous and non-Indigenous Australians, the lack of a recent decline in incidence and the higher proportion of Indigenous people exposed to HIV by heterosexual contact indicate the need to intensify interventions to prevent HIV transmission among Indigenous people.     

Cancer incidence among migrant populations in South Australia

South Australian Cancer Registry data for 1977-1986 have been used to compare the incidence of cancer for overseas-born populations and for the State as a whole. British and Irish migrants were found to have a higher incidence of all cancer sites combined, largely because of elevations in the incidence of cancers of the lung, stomach and female breast, whereas southern-European migrants showed a lower incidence of cancer, mostly as a result of low incidence rates for cancers of the colon, prostate, lung (women only), melanoma and female breast. Differences in incidence also were evident by country of birth for cancers of the buccal cavity, oropharynx, nasopharynx, oesophagus, liver, larynx, pleura, testes, uterine body, bladder and kidney, and various lymphohaematopoietic cancers. The aetiological implications of these findings, particularly in relation to environmental and life-style factors, are considered.     

Lower than expected morbidity and mortality for an Australian Aboriginal population: 10-year follow-up in a decentralised community

OBJECTIVE: To examine mortality from all causes and from cardiovascular disease (CVD), and CVD hospitalisation rate for a decentralised Aboriginal community in the Northern Territory. DESIGN AND PARTICIPANTS: For a community-based cohort of 296 people aged 15 years or older screened in 1995, we reviewed hospital and primary health care records and death certificates for the period up to December 2004 (2800 person-years of follow-up). MAIN OUTCOME MEASURES: Mortality from all causes and CVD, and hospitalisation with CVD coded as a primary cause of admission; comparison with prior trends (1988 to 1995) in CVD risk factor prevalence for the community, and with NT-specific Indigenous mortality and hospitalisation rates. RESULTS: Mortality in the cohort was 964/100,000 person-years, significantly lower than that of the NT Indigenous population (standardised mortality ratio [SMR], 0.62; 95% CI, 0.42-0.89). CVD mortality was 358/100,000 person-years for people aged 25 years or older (SMR, 0.52; 95% CI, 0.23-1.02). Hospitalisation with CVD as a primary cause was 13/1000 person-years for the cohort, compared with 33/1000 person-years for the NT Indigenous population. CONCLUSION: Contributors to lower than expected morbidity and mortality are likely to include the nature of primary health care services, which provide regular outreach to outstation communities, as well as the decentralised mode of outstation living (with its attendant benefits for physical activity, diet and limited access to alcohol), and social factors, including connectedness to culture, family and land, and opportunities for self-determination.     

Fulfilling prophecy? Sexually transmitted infections and HIV in Indigenous people in Western Australia

OBJECTIVE: To compare trends and rates of HIV and sexually transmitted infections in Indigenous and non-Indigenous people of Western Australia. DESIGN AND SETTING: Analysis of WA notification data for chlamydia, gonorrhoea, and primary and secondary syphilis in 2002, and for HIV infections from 1983 to 2002. MAIN OUTCOME MEASURES: Rates of HIV and sexually transmitted infection by Indigenous status. RESULTS: In 2002, there were 3046 notifications for chlamydia, 1380 for gonorrhoea and 64 for syphilis. When information on Indigenous status was available, Indigenous people accounted for 41% of chlamydia and 76% of gonorrhoea notifications, with Indigenous:non-Indigenous age-standardised rate ratios of 16 (95% CI, 14-17) and 77 (95% CI, 67-88), respectively. Indigenous people accounted for 90.6% of syphilis notifications (age-standardised Indigenous:non-Indigenous rate ratio, 242 [95% CI, 104-561]). From 1985 to 2002, HIV notification rates for non-Indigenous people in WA declined and rates for Indigenous people increased. From 1994 to 2002, there were 421 notifications of HIV infection in WA residents, 52 (12.4%) in Indigenous people and 369 (87.6%) in non-Indigenous people. Indigenous people accounted for 39% and 6.2% of all notifications in WA females and males, respectively. The Indigenous:non-Indigenous rate ratios were 18 (95% CI, 12-29) for females and 2 (95% CI, 1-3) for males. CONCLUSIONS: Indigenous Western Australians are at greater risk of HIV transmission than non-Indigenous people. Strategies to prevent further HIV infection in Indigenous Australians should include control of sexually transmitted infections.     

Regional variation in the incidence of end-stage renal disease in Indigenous Australians

OBJECTIVE: To evaluate regional variation in the incidence of end-stage renal disease (ESRD) in Indigenous Australians, and to examine the proximity to ESRD treatment facilities of Indigenous patients. DESIGN: Secondary data review, with collection of primary data regarding patients' place of residence before beginning ESRD treatment. PARTICIPANTS: Indigenous ESRD patients who commenced treatment in Australia during 1993-1998. METHODS: We obtained data from the Australian and New Zealand Dialysis and Transplant Registry regarding 719 Indigenous patients who started ESRD treatment between 1 January 1993 and 31 December 1998. We obtained primary data from the treating renal units to determine the place of residence before beginning renal replacement therapy. We calculated the average annual incidence of ESRD for each of the 36 Aboriginal and Torres Strait Islander Commission regions using population estimates based on the 1996 Census, and calculated standardised incidence ratios with 95% confidence intervals for each region. We compared the number of cases with the treatment facilities available in each region. MAIN OUTCOME MEASURE: Regional standardised ESRD incidence for Indigenous Australians referenced to the total resident population of Australia. RESULTS: Standardised ESRD incidence among Indigenous Australians is highest in remote regions, where it is up to 30 times the national incidence for all Australians. In urban regions the standardised incidence is much lower, but remains significantly higher than the national incidence. Forty-eight per cent of Indigenous ESRD patients come from regions without dialysis or transplant facilities and 16.3% from regions with only satellite dialysis facilities. CONCLUSIONS: There is marked regional variation in the incidence of ESRD among Indigenous Australians. Because of the location of treatment centres, there is inequitable access to ESRD treatment services for a significant proportion of Indigenous patients.     

Causes of inequality in life expectancy between Indigenous and non-Indigenous people in the Northern Territory, 1981-2000: a decomposition analysis

OBJECTIVE: To identify the causes of the gap in life expectancy between Indigenous and non-Indigenous populations of the Northern Territory and how the causes have evolved over time. DESIGN AND SETTING: Analysis of NT death data over four 5-year periods, 1 January 1981 to 31 December 2000 inclusive. A decomposition method using discrete approximations (Vaupel and Romo) was applied to abridged life tables for the Indigenous and non-Indigenous populations of the NT. MAIN OUTCOME MEASURES: Contribution of causes of death, grouped according to global burden of disease groups and categories, to the life expectancy gap. RESULTS: The gap between the life expectancy of Indigenous and non-Indigenous people in the NT did not appear to narrow over time, but there was a marked shift in the causes of the gap. In terms of disease groups, the contribution of communicable diseases, maternal, perinatal and nutritional conditions halved during the 20 years to 2000. Meanwhile, the contribution of non-communicable diseases and conditions increased markedly. The contribution of injuries remained static. In terms of disease categories, the contribution of infectious diseases, respiratory infections and respiratory diseases declined considerably; however, these gains were offset by significantly larger increases in the contribution of cardiovascular diseases and diabetes for Indigenous women and cardiovascular diseases, cancers and digestive diseases for Indigenous men. CONCLUSIONS: The main contributors to the gap in life expectancy between the Indigenous and non-Indigenous populations were non-communicable diseases and conditions, which are more prevalent in ageing populations. With the life expectancy of Indigenous people in the NT expected to improve, it is important that public health initiatives remain focused on preventing and managing chronic diseases.     

Nutrition-related disorders in Indigenous Australians: how things have changed

Awareness of a serious Indigenous health problem in Australia did not emerge until the 1960s and 1970s. Much attention was focused at the time on poor pregnancy outcomes, high infant and young child mortality rates, and childhood malnutrition and impaired growth, often associated with high infectious disease burdens. Although that situation has improved somewhat, Indigenous infant and child health is still poor compared with that of other Australian children. Over recent decades, there has been a rapid rise among Indigenous people of nutrition-related "lifestyle" disorders such as obesity, cardiovascular disease, type 2 diabetes mellitus and chronic renal disease and their complications. This epidemic of disabling and often fatal chronic diseases in Indigenous Australians is also occurring in disadvantaged groups in many other countries. Control of this potentially disastrous epidemic must become a much higher priority in Indigenous health programs. Governments must commit to this task in cooperation and collaboration with Indigenous organisations and communities.     

Cancer incidence and mortality in Zhejiang Province,Southeast China, 2016: a population-based study

Backgrounds:Cancer is one of the main causes of death worldwide, seriously threatening human health and life expectancy. We aimed to analyze the cancer incidence and mortality rates during 2016 in Zhejiang Province, Southeast China.Methods:Data were collected from 14 population-based cancer registries across Zhejiang Province of China. Cancer incidence and mortality rates stratified by sex and region were analyzed. The crude rate, age-standardized rate, age-specific and region-specific rate, and cumulative rate were calculated. The proportions of 10 common cancers in different groups and the incidence and mortality rates of the top five cancers in different age groups were also calculated. The Chinese national census of 2000 and the world Segi population was used for calculating the age-standardized incidence and mortality rates.Results:The 14 cancer registries covered a population of 14,250,844 individuals, accounting for 29.13% of the population of Zhejiang Province. The total reported cancer cases and deaths were 55,835 and 27,013, respectively. The proportion of morphological verification (MV%) was 78.95% of the population, and percentage of incident cases identified through death certificates only (DCO%) was 1.23% with a mortality-to-incidence ratio (M/I ratio) of 0.48. The crude incidence rate in Zhejiang cancer registration areas was 391.80/10⁵; the age-standardized incidence rate of the Chinese standard population (ASIRC) and the age-standardized incidence rate of the world standard population (ASIRW) were 229.76/10⁵ and 220.96/10⁵, respectively. The incidence rate in men was higher than that in women. The incidence rate increased rapidly after 45 years of age and peaked in individuals aged 80 to 84 years. The top 10 incidence rates of cancers were lung cancer, female breast cancer, thyroid cancer, colorectal cancer, stomach cancer, liver cancer, prostate cancer, cervical cancer, esophageal cancer, and pancreatic cancer (from highest to lowest). The crude mortality rate in Zhejiang cancer registration areas was 189.55/10⁵; the age-standardized mortality rate of the Chinese standard population (ASMRC) and the age-standardized mortality rate of the world standard population (ASMRW) were 94.46/10⁵ and 93.42/10⁵, respectively. The mortality rate in men was higher than that in women, and the male population in rural areas was higher than that in urban areas. The cancer mortality rate increased rapidly after 50 years of age and peaked in individuals aged 85+ years. The top 10 mortality rates of cancers were lung cancer, liver cancer, stomach cancer, colorectal cancer, pancreatic cancer, esophageal cancer, female breast cancer, prostate cancer, lymphoma, and leukemia (from highest to lowest).Conclusions:Lung cancer, female breast cancer, thyroid cancer, colorectal cancer, prostate cancer, liver cancer, and stomach cancer were the most common cancers in Zhejiang Province. Effective prevention and control measures should be established after considering the different characteristics of cancers in urban and rural areas.     

The outcome of critically ill Indigenous patients

OBJECTIVE: To investigate the short-term outcome of critically ill Indigenous patients. DESIGN AND PARTICIPANTS: Retrospective cohort study using de-identified audit data from a tertiary intensive care unit (ICU) in Western Australia for the 11-year period 1 January 1993 to 31 December 2003. MAIN OUTCOME MEASURES: Hospital mortality (crude, and adjusted for severity of illness). RESULTS: Of 16 757 ICU patients, 1076 (6.4%) were identified as Indigenous. The Indigenous patients were younger and more commonly had chronic liver and renal diseases. Indigenous people represented 3.2% of the population of Western Australia in 2001, but represented 3.1% and 9.5% of all elective and emergency ICU admissions, respectively. Diagnoses of sepsis, pneumonia, trauma, and cardiopulmonary arrest were common among critically ill Indigenous patients. Following emergency admission, the crude hospital mortality for Indigenous patients was higher (22.7% v 19.2%; crude odds ratio, 1.24; 95% CI, 1.04-1.47) than for non-Indigenous patients. The crude hospital mortality of critically ill Indigenous patients was lower than that predicted by the APACHE II prognostic model and was similar to that of non-Indigenous patients after adjusting for severity of illness and chronic health status. CONCLUSIONS: The pattern of critical illness affecting Indigenous Australians in Western Australia was different from that affecting non-Indigenous patients. The crude hospital mortality was high, but similar to that of non-Indigenous Australians after adjusting for severity of illness and chronic health status.     

Racial disparities in infection-related mortality at Alice Springs Hospital, Central Australia, 2000--2005

OBJECTIVE: To compare infection-related mortality rates and pathogens isolated for Indigenous and non-Indigenous adult patients at Alice Springs Hospital (ASH). DESIGN, PARTICIPANTS AND SETTING: Retrospective study of inhospital deaths of adults (patients aged > or = 15 years) associated with an infection during a medical or renal admission to ASH between 1 January 2000 and 31 December 2005. MAIN OUTCOME MEASURES: Admission- and population-based infection-related mortality rates and mortality rate ratios (MRRs) for Indigenous versus non-Indigenous adults. RESULTS: There were 513 deaths, of 351 Indigenous and 162 non-Indigenous patients. For Indigenous patients, 60% of deaths were infection-related, compared with 25% for non-Indigenous patients (P < 0.001). The admission-based infection-related MRR for Indigenous versus non-Indigenous adults was 2.2 (95% CI, 1.6-3.1) (15.3 v 6.8 deaths per 1000 admissions; P < 0.001). After adjusting for age and year of death, the population-based infection-related MRR was 11.3 (95% CI, 8.0-15.8) overall (351 v 35 deaths per 100,000 population; P < 0.001) and 31.5 (95% CI, 16.1-61.8) for patients aged < 60 years. The median age of patients who died with an infection was 49 (interquartile range [IQR], 38-67) years for Indigenous and 73 (IQR, 58-80) years for non-Indigenous patients (P < 0.001). For Indigenous patients, 56% of infection-related deaths were associated with bacterial sepsis, with half of these due to enteric organisms. Other deaths followed chronic hepatitis B infection, invasive fungal infections and complications of strongyloidiasis. CONCLUSION: Indigenous patients at ASH are 11 times more likely than non-Indigenous patients to die with an infectious disease. This racial disparity reflects the ongoing socioeconomic disadvantage experienced by Indigenous Australians.     

Research, information and consent for the Australian Health Survey: a separate standard for Indigenous people?

In the next Australian Health Survey, Indigenous people under 18 years of age will be excluded from direct clinical measurements and laboratory tests. Indigenous people of all ages were to be excluded from the opportunity, offered to other Australians, to donate blood and urine samples to a national repository. This component has now been abandoned for the whole cohort. This sets perilous precedents of exclusion from opportunities available to all other Australians, and deprives the medical community of information that could inform strategies to improve health profiles and outcomes in this seriously disadvantaged group.     

Towards a more comprehensive understanding of cancer burden in North Carolina: priorities for intervention

OBJECTIVE: To apply 4 measures of population burden in examining cancer burden in North Carolina and to identify priorities for intervention. METHODS: Four measures were used: incidence, mortality, prevalence, and years of potential life lost (YPLL). The North Carolina Central Cancer Registry provided summary data on incidence and mortality and record-level data that were examined using SEER*Stat software to calculate prevalence. North Carolina vital statistics (mortality) data and life expectancy estimates stratified by age, race, and sex were used to calculate YPLL. Each cancer site was ranked according to burden for each of the 4 individual burden measures and summarized into an overall rank. Burden was examined overall and by sex and race. PRINCIPAL FINDINGS: Four cancers--lung/bronchus, female breast, prostate, and colon/rectum--accounted for approximately 57% of the total cancer incidence, prevalence, mortality, and YPLL in North Carolina. Patterns of burden in gender and race subgroups were similar, although non-whites often had higher mortality rates than did whites despite similar incidence rates. An estimated 207,583 people were living with cancer in 2004 Breast and prostate cancer accounted for 42% of these survivors. Lung/bronchus cancer was the most severe cancer, accounting for more deaths and years of life lost than any other 5 cancers combined. CONCLUSIONS: Each of the 4 measures provides unique insight and guidance for cancer coordination and control efforts. Lung/bronchus, female breast, prostate, and colon/rectum cancers accounted for the majority of North Carolina's cancer burden and should be priorities for intervention.     

Estimation Study of New Cancer Cases and Deaths in Wuwei,Hexi Corridor Region,China, 2018

Population-based cancer registration data were collected to estimate the cancer incidence and mortality in Wuwei, Hexi Corridor Region, China in 2018. We used the 2011-2013datato predict the number of new cases and deaths in 2018 and the 2003-2013data to analyze trends in cancer incidence and mortality. The goal is to enable cancer prevention and control directions. Our results indicated that stomach cancer is the most common cancer. For all cancers combined, the incidence and mortality rates showed significantly increasing trends (+2.63% per year; P<0.05 and+1.9% per year; P <0.05). This study revealed a significant cancer burden among the population of this area. Cancer screening and prevention should be performed after an epidemiological study of the cause of the cancer is completed.     

Singapore cancer trends in the last decade

In this review, we examine the trends in cancer incidence, mortality and survival in the last decade, using published data from the Singapore Cancer Registry in the period 1998 to 2009. While overall cancer incidences have remained stable, overall cancer mortality rates have declined for both genders. Thus, it is not surprising that there was an improvement in cancer survival. A steady decrease in lung cancer among males and females was observed, thereby leading to a drop in its cancer ranking. In the last five years, the most frequently occurring cancer was colorectal cancer among the male population and breast cancer among females. Survival for both cancers remained relatively optimistic. There is good reason to pay special attention to colorectal cancer due to its high frequency of occurrence among the Singapore population and because it is amenable to early detection via screening.