Melbourne School of Population and Global Health - Research Publications
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ItemNo Preview AvailableCardiometabolic health markers among Aboriginal adolescents from the Next Generation Youth Wellbeing Cohort Study.(Elsevier BV, 2024-04)OBJECTIVE: The objective of this study was to investigate cardiometabolic health markers among Aboriginal adolescents aged 10-24 years and relationships with age, gender, and body composition. METHODS: Baseline data (2018-2020) from the Next Generation Youth Wellbeing Cohort Study (Western Australia, New South Wales, and Central Australia) on clinically assessed body mass index, waist/height ratio, blood pressure, glycated haemoglobin (HbA1c), total and high-density lipoprotein cholesterol, total/high-density lipoprotein cholesterol ratio, and triglycerides were analysed. RESULTS: Among 1100 participants, the proportion with individual health markers within the ideal range ranged from 59% for total cholesterol to 91% for HbA1c. Four percent had high blood pressure, which was more common with increasing age and among males; 1% had HbA1c indicative of diabetes. Healthier body composition (body mass index and waist/height ratio) was associated with having individual health markers in the ideal range and with an ideal cardiometabolic profile. CONCLUSIONS: Most Aboriginal adolescents in this study had cardiometabolic markers within the ideal range, though markers of high risk were present from early adolescence. Ideal health markers were more prevalent among those with healthy body composition. IMPLICATIONS FOR PUBLIC HEALTH: Specific screening and management guidelines for Aboriginal adolescents and population health initiatives that support maintenance of healthy body composition could help improve cardiometabolic health in this population.
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ItemNo Preview AvailableIndigenous peoples' health after Australia's No vote(BMJ Publishing Group, 2024-01-11)
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ItemNo Preview AvailableCumulative incidence of child protection system contacts among a cohort of Western Australian Aboriginal children born 2000 to 2013(PERGAMON-ELSEVIER SCIENCE LTD, 2023-09)BACKGROUND: Reducing the over-representation of Aboriginal children in the child protection system is a key target for the Australian government. OBJECTIVE: We aimed to provide more recent evidence on the population-level cumulative incidence of contacts for Aboriginal children with child protective services (CPS) in Western Australia (WA). PARTICIPANTS AND SETTING: Linked administrative data was provided for WA CPS between 2000 and 2015 for 33,709 Aboriginal children born in WA between 2000 and 2013. METHODS: Descriptive summaries and cumulative incidence estimates were used to examine changes in CPS contact trends over time and within sibling groups. RESULTS: There was an increase in early-childhood contacts for children born more recently, with 7.6 % and 2.3 % of children born in 2000-2001 having a notification and placement in out-of-home care by age one, respectively, compared to 15.1 % and 4.3 % of children born in 2012-2013. Among sibling groups where at least one sibling had a CPS contact, approximately half of children had their first contacts on the same date as another sibling. For children born after one of their siblings had been placed in out-of-home care, 31.9 % had themselves been placed in out-of-home care by age one. CONCLUSIONS: Multiple children tend to be placed into out-of-home care when at least one sibling is, which is likely to have a significant impact on families affected. The additional risk of placement also carries over to children born after the first removal in a sibling group, highlighting the need for further support to prevent future removals.
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ItemNo Preview AvailableHealth behaviours associated with healthy body composition among Aboriginal adolescents in Australia in the 'Next Generation: Youth Well-being study'.(Elsevier BV, 2023-10)This study described the distribution of healthy body composition among Aboriginal adolescents in Australia aged 10-24 years and examined associations with health behaviours and self-rated health. Data were cross-sectional from the 'Next Generation: Youth Well-being study' baseline (N = 1294). We used robust Poisson regression to quantify associations of self-reported health behaviours (physical activity, screen time, sleep, consumption of vegetables, fruit, soft drinks and fast food, and tobacco smoking and alcohol) and self-rated health to healthy body mass index (BMI) and waist/height ratio (WHtR). Overall, 48% of participants had healthy BMI and 64% healthy WHtR, with healthy body composition more common among younger adolescents. Higher physical activity was associated with healthy body composition (5-7 days last week vs none; adjusted prevalence ratio (aPR) healthy BMI 1.31 [95% CI 1.05-1.64], and healthy WHtR 1.30 [1.10-1.54]), as was recommended sleep duration (vs not; aPR healthy BMI 1.56 [1.19-2.05], and healthy WHtR 1.37 [1.13-1.67]). There was a trend for higher proportion of healthy body composition with more frequent fast food consumption. Healthy body composition was also associated with higher self-rated health ('very good/excellent' vs 'poor/fair'; aPR healthy BMI 1.87 [1.45-2.42], and healthy WHtR 1.71 [1.40-2.10]). Culturally appropriate community health interventions with a focus on physical activity and sleep may hold promise for improving body composition among Aboriginal adolescents.
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ItemDemographic drivers of the growth of the number of Aboriginal and Torres Strait Islander people living with dementia, 2016-2051(WILEY, 2022-12)OBJECTIVE: To examine the demographic drivers that contribute to the future growth in the population of Aboriginal and Torres Strait Islander peoples living with dementia in Australia. METHODS: Design: Multistate, Indigenous status, cohort component, population projection model. SETTING: National-level, Aboriginal and Torres Strait Islander population. DATA: Data prepared by the Australian Bureau of Statistics on births, deaths, migration and identification change. Australian Institute of Health and Welfare estimates of dementia prevalence alongside estimates from several studies. MAJOR OUTCOME MEASURES: Number of older people living with dementia alongside a decomposition of demographic drivers of growth. RESULTS: By 2051, the relative growth in the number of Aboriginal and Torres Strait Islander peoples aged 50+ with dementia ranges from 4½ to 5½ times (under three prevalence scenarios) its 2016 estimate. Cohort flow (the gradual movement of younger cohorts into the 50+ age group, and the depletion of older cohorts from death, over time) is a key driver of the growth in the number of older people living with dementia. CONCLUSIONS: High growth in the number of people living with dementia poses implications for culturally appropriate care, health-care access and support for Aboriginal and Torres Strait Islander families, carers and their communities.
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ItemNo Preview AvailableMaternal asthma in Australian indigenous women and perinatal outcomes: A whole population-linked study.(Wiley, 2023-02)OBJECTIVE: To assess the association between maternal asthma and adverse perinatal outcomes in an Australian Indigenous population. METHODS: This prospective cohort study included all Indigenous mother and baby dyads for births from 2001 to 2013 in Western Australia (n = 25 484). Data were linked from Western Australia Births, Deaths, Midwives, Hospital, and Emergency Department collections. Maternal asthma was defined as a self-reported diagnosis at an antenatal visit or hospitalization or emergency visit for asthma during pregnancy or less than 3 years before pregnancy. Associations with birth, labor, and pregnancy outcomes were assessed using generalized estimating equations. Asthma exacerbation during pregnancy and stratification by remoteness was also assessed. RESULTS: Maternal asthma was associated with placental abruption (adjusted odds ratio [aOR], 1.59 [95% confidence interval (CI), 1.07-2.35]), threatened preterm labor (aOR, 1.58 [95% CI, 1.39-1.79]), and emergency cesarean sections (aOR, 1.27 [95% CI, 1.13-1.44]). These risks increased further with an asthma exacerbation during pregnancy or if the mother was from a remote area. No associations were found for low birth weight, preterm birth, small for gestational age, or perinatal mortality. CONCLUSION: Maternal asthma in Indigenous women is associated with an increased risk of emergency cesarean sections, placental abruption, and threatened preterm labor. These risks may be mitigated by improved management of asthma exacerbations during pregnancy.
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ItemSocial and Behavioural Correlates of High Physical Activity Levels among Aboriginal Adolescent Participants of the Next Generation: Youth Wellbeing Study.(MDPI AG, 2023-02-20)Physical activity typically decreases during teenage years and has been identified as a health priority by Aboriginal adolescents. We examined associations between physical activity levels and sociodemographic, movement and health variables in the Aboriginal led 'Next Generation: Youth Well-being (NextGen) Study' of Aboriginal people aged 10-24 years from Central Australia, Western Australia and New South Wales. Baseline survey data collected by Aboriginal researchers and Aboriginal youth peer recruiters from 2018 to 2020 examined demographics and health-related behaviours. Logistic regression was used to estimate odds ratios (OR) for engaging in high levels of physical activity in the past week (3-7 days; 0-2 days (ref), or 'don't remember') associated with demographic and behavioural factors. Of 1170 adolescents, 524 (41.9%) had high levels of physical activity; 455 (36.4%) had low levels; 191 (15.3%) did not remember. Factors independently associated with higher odds of physical activity 3-7 days/week were low weekday recreational screen time [55.3% vs. 44.0%, OR 1.79 (1.16-2.76)], having non-smoking friends [50.4% vs. 25.0%, OR 2.27 (1.03-5.00)] and having fewer friends that drink alcohol [48.1% vs. 35.2%, OR 2.08 (1.05-4.14)]. Lower odds of high physical activity were independently associated with being female [40.2% vs. 50.9%, OR 0.57 (0.40-0.80)] and some findings differed by sex. The NextGen study provides evidence to inform the co-design and implementation of strategies to increase Aboriginal adolescent physical activity such as focusing on peer influences and co-occurring behaviours such as screen time.
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ItemNo Preview AvailableDon't Follow the Smoke-Listening to the Tobacco Experiences and Attitudes of Urban Aboriginal Adolescents in the Study of Environment on Aboriginal Resilience and Child Health (SEARCH).(MDPI AG, 2023-03-04)Preventing smoking among young Aboriginal people is important for reducing health inequities. Multiple factors were associated with adolescent smoking in the SEARCH baseline survey (2009-12) and discussed in a follow-up qualitative study that aimed to inform prevention programs. Twelve yarning circles were facilitated by Aboriginal research staff at two NSW sites in 2019 with 32 existing SEARCH participants aged 12-28 (17 female, 15 male). Open discussion around tobacco was followed by a card sorting activity, prioritising risk and protective factors and program ideas. The age of initiation varied by generation. Older participants had established smoking in their early adolescence, whereas the current younger teens had little exposure. Some smoking commenced around high school (from Year 7), and social smoking increased at age 18. Mental and physical health, smoke-free spaces and strong connections to family, community and culture promoted non-smoking. The key themes were (1) drawing strength from culture and community; (2) how the smoking environment shapes attitudes and intentions; (3) non-smoking as a sign of good physical, social and emotional wellbeing; and (4) the importance of individual empowerment and engagement for being smoke-free. Programs promoting good mental health and strengthening cultural and community connections were identified as a priority for prevention.
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ItemYoung Aboriginal people in Australia who have never used marijuana in the 'Next Generation Youth Well-being study': A strengths-based approach(ELSEVIER, 2021-09)BACKGROUND: Being young is a period of experimentation which can lead to increased vulnerability to poor health choices and outcomes. Aboriginal and Torres Strait Islander (Aboriginal) people have a long and strong history of resilience; however, a deficit approach is often taken with messages of poor health and low socioeconomic status. This study takes a strengths-based approach and examines the demographic factors and behaviours associated with never using marijuana among young Aboriginal people in Australia. METHODS: Overall, 521 Aboriginal people aged 16-24 years from Western Australia, Central Australia and New South Wales participated in the Next Generation: Youth Wellbeing Study. The baseline survey examined demographics, health-related behaviours and clinical indicators of young Aboriginal people. We calculated the number and proportion of young Aboriginal people who never used marijuana by demographics and behavioural factors. Logistic regression was used to assess the demographic and behavioural factors associated with never using marijuana. RESULTS: Of the 521 participants, 458 (87.9%) answered the question about marijuana use of which 220 had incomplete demographic or behavioural questions, leaving a final cohort of 301 participants. A total of 174 (57.8%) had never used marijuana. A higher proportion of young Aboriginal people who never used marijuana were younger (16-19 years old), female, queer, single, lived in Central Australia, were students, had never smoked tobacco, had never drank alcohol, never had anxiety and never had depression. Never using marijuana was independently associated with being a parent or carer of a child (Adjusted Odds Ratio (AOR): 2.80, 95% CI: 1.03-7.59, p = 0.043), never smoking tobacco (AOR: 29.73, 95 CI: 13.32-66.37, p < 0.001), never drinking alcohol (AOR: 2.78, 95 CI: 1.12-6.93, p = 0.028), not having anxiety (AOR: 3.49, 95 CI: 1.19-10.23, p = 0.022), and having lower levels of distress (AOR: 2.63, 95 CI: 1.20-5.77, p = 0.016). CONCLUSION: Our study shows that more than half of young Aboriginal people did not use marijuana, smoke, or drink alcohol and that those who had not used marijuana had lower levels of distress.