Frequent use of hospital inpatient services during a nine year period: a retrospective cohort study.

BACKGROUND: Frequent use (FU) of hospital services impacts on patients and health service expenditure. Studies examining FU in emergency departments and inpatient settings have found heterogeneity and the need to differentiate between potentially preventable FU and that associated with ongoing management of complex conditions. Psychosocial factors have often been reported as underpinning or exacerbating the phenomena. Most FU studies have been limited by time, to a single study site, or restricted to specific diagnoses or patient groups. This study provides a comprehensive description of adult patient characteristics, conditions and risk factors associated with FU, based on admissions to the five public hospitals in the Northern Territory (NT) of Australia over a nine year period. The study population is distinctive comprising both Aboriginal and non-Aboriginal patients. METHODS: Data on all inpatient episodes in NT public hospitals between 2005 and 2013 was analysed to identify patients with any FU (four or more episodes within any 12-month period) and measure FU duration (number of FU years) and intensity (mean number of episodes per FU year). Pregnancy, alcohol-related and mental health condition flags were assigned to patients with any episode with relevant diagnoses during the study period. Multivariate analysis was used to assess factors associated with any FU, FU duration and FU intensity, separately for Aboriginal and non-Aboriginal patients. RESULTS: Of people with any inpatient episodes during the study period, 13.6% were frequent users (Aboriginal 22%, non-Aboriginal 10%) accounting for 46.6% of all episodes. 73% of frequent users had only one FU year. Any FU and increased FU duration were more common among individuals who were: Aboriginal; older; female; and those with a pregnancy, alcohol or mental health flag. Having two or more alcohol-related episodes in the nine-year period was strongly associated with any FU for both Aboriginal (odds ratio 8.9, 95% CI. 8.20-9.66) and non-Aboriginal patients (11.5, 9.92-13.26). CONCLUSION: For many people, frequent inpatient treatment is necessary and unavoidable. This study suggests that damage arising from excessive alcohol consumption (either personal or by others) is the single most avoidable factor associated with FU, particularly for Aboriginal people.

Disparity in Mortality From Rheumatic Heart Disease in Indigenous Australians.

BACKGROUND: Recent estimates of the global burden of rheumatic heart disease (RHD) have highlighted the paucity of reliable RHD mortality data from populations most affected by RHD. METHODS AND RESULTS: We investigated RHD mortality rates and trends for Indigenous and non-Indigenous Australians in the Northern Territory (NT) for the period 1977-2005 and seminationally (NT plus 4 other states, covering 89% of Indigenous Australians) from 1997 to 2005 using vital statistics data. All analysis was undertaken by Indigenous status, sex, and age at death. In the NT, 90% of all deaths from RHD were among Indigenous persons; however, the Indigenous population makes up only 30.4% of the NT population. The death rate ratio (Indigenous compared with non-Indigenous) was 54.80 in the NT and 12.74 in the other 4 states (estimated at the median age of 50 years). Non-Indigenous death rates were low for all age groups except ≥65 years, indicating RHD deaths in the elderly non-Indigenous population. Death rates decreased at a more rapid rate for non-Indigenous than Indigenous persons in the NT between 1997 and 2005. Indigenous persons in other parts of Australia showed lower death rates than their NT counterparts, but the death rates for Indigenous persons in all states were still much higher than rates for non-Indigenous Australians. CONCLUSIONS: Indigenous Australians are much more likely to die from RHD than other Australians. Among the Indigenous population, RHD mortality is much higher in the NT than elsewhere in Australia, exceeding levels reported in many industrialized countries more than a century ago. With the paucity of data from high-prevalence areas, these data contribute substantially to understanding the global burden of RHD mortality.

How much is too much? Alcohol consumption and related harm in the Northern Territory.

OBJECTIVE: To present recent estimates of alcohol consumption and its impact on the health of people in the Northern Territory, and to draw comparisons with Australia as a whole. DESIGN, SETTING AND PARTICIPANTS: Descriptive study of alcohol consumption in the NT population, based on sales data and self-report surveys, and alcohol-attributable deaths and hospitalisations among people in the NT in the 2004-05 and 2005-06 financial years using population alcohol-attributable fractions specific to the NT. MAIN OUTCOME MEASURES: Per capita consumption of pure alcohol, self-reported level of consumption, and age-standardised rates of death and hospitalisation attributable to alcohol. RESULTS: Apparent per capita consumption of pure alcohol for both Aboriginal and non-Aboriginal populations in the NT has been about 14 litres or more per year for many years, about 50% higher than for Australia as a whole. We estimated that there were 120 and 119 alcohol-attributable deaths in the NT in 2004-05 and 2005-06, respectively, at corresponding age-standardised rates of 7.2 and 7.8 per 10 000 adult population. Alcohol-attributable deaths occur in the NT at about 3.5 times the rate they do in Australia generally; rates in non-Aboriginal people were about double the national rate, while they were 9-10 times higher in Aboriginal people. There were 2319 and 2544 alcohol-attributable hospitalisations in the NT in 2004-05 and 2005-06, respectively, at corresponding rates of 146.6 and 157.7 per 10 000 population (more than twice the national rate). CONCLUSION: In recent years, alcohol consumption and consequent alcohol-attributable deaths and hospitalisations for both Aboriginal and non-Aboriginal people in the NT have occurred at levels far higher than elsewhere in Australia.

Avoidable hospitalisation in Aboriginal and non-Aboriginal people in the Northern Territory.

OBJECTIVES: To analyse rates of avoidable hospitalisations in Aboriginal and non-Aboriginal residents of the Northern Territory, 1998-99 to 2005-06, and to consider the implications for primary care interventions. DESIGN AND SETTING: Retrospective descriptive analysis of inpatient discharge data from NT public hospitals. MAIN OUTCOME MEASURES: Avoidable hospitalisations by age, sex, Aboriginality and condition, with annual time trends. RESULTS: Between 1998-99 and 2005-06, Aboriginal people in the NT had an avoidable hospitalisation rate of 11 090 per 100 000 population, nearly four times higher than the Australian rate of 2848 per 100 000. The rate for non-Aboriginal NT residents was 2779 per 100 000. During this period, the average annual increase in avoidable hospitalisations was 11.6% (95% CI, 11.0%-12.1%) in the NT Aboriginal population and 3.9% (95% CI, 3.3%-4.5%) in the non-Aboriginal population. The greatest increase occurred in those aged > or = 45 years, and was primarily attributable to diabetes complications. CONCLUSIONS: The significantly higher rates of avoidable hospitalisations in NT Aboriginal people reflect the emerging epidemic of chronic disease in this population, highlight barriers to Aboriginal people accessing effective primary care, and emphasise the extent of potential health gains with appropriate interventions.

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.