Adverse Childhood Experiences (ACEs) do not discriminate: they can be experienced by any child, in any household, in any area of the world (Australian Institute of Family Studies,
2017; Bellis et al.,
2014b; Stoltenborgh et al.,
2015). The ACEs, as defined by Felitti and colleagues (
1998), are common adversities that have been widely found to have negative, cumulative effects across the lifespan, in the two decades since they were first studied (Anda et al.,
2006; Chartier et al.,
2010; Kalmakis & Chandler,
2015). The ten adversities captured in the ACEs are: physical, emotional, and sexual abuse; physical and emotional neglect; parental separation/divorce; witnessing inter-partner violence; and living with someone who has a mental health condition or substance use problem, or becomes incarcerated (Anda et al.,
2006). The first five ACEs may be thought of as maltreatment-type adversities, and the last five as dysfunction-type adversities (Negriff,
2020). These ten ACEs may occur any time between birth and age 18, and often co-occur with one another (Felitti et al.,
1998). Their cumulative impact may be seen across health, wellbeing and socioeconomic domains, whereby experiencing a higher number of different types of ACEs is linked to increased risk for poor outcomes such as poor self-rated health, increased health risk behaviours, cancer, heart disease, respiratory disease, mental ill health, problematic use of alcohol and drugs, interpersonal and self-directed violence (Hughes et al.,
2017), homelessness (Kalmakis & Chandler,
2015), low educational attainment, and unemployment (Hardcastle et al.,
2018). Although the characteristics and impact of each of the ten ACEs differ from one another, their combined impact across the lifespan may be persistent and pervasive (Bellis et al.,
2019), and extend intergenerationally (Chung et al.,
2010; Fonseka et al.,
2015; Hammett et al.,
2020; Hughes et al.,
2017; Reavis et al.,
2013). ACEs are positioned within a wider context that includes other adversities (e.g., neighbourhood violence, peer victimisation; Finkelhor et al.,
2015; Kalmakis & Chandler,
2014), and other factors that may be important to consider alongside ACEs (e.g., socioeconomic position, positive life experiences; Bethell et al.,
2019; Taylor-Robinson et al.,
2018). By focusing on a standard set of ten types of maltreatment and dysfunction, the ACEs framework provides a unifying theoretical basis for a broad evidence base focused on understanding and mitigating the impact of these adversities across the life span, across generations, and across the globe.
The Prevalence of Adversity
A large body of international literature has therefore taken shape over the past few decades, unfortunately indicating that a high proportion of children across the world experience adversity. Meta-analyses estimate that globally, between 46% and 64% of children experience at least one ACE (Kalmakis & Chandler,
2015), 19% to 35% of children experience two or more ACEs (Bellis et al.,
2019), and between 7% and 20% of children experience at least four ACEs (Bellis, et al.,
2014b; Felitti et al.,
1998; Logan-Greene et al.,
2014). The prevalence and impact of ACEs may differ from place to place, however (Bellis et al.,
2019), and it is therefore important to understand and address local contexts of adversity. While most of the ACEs literature has thus far focused on the U.S. context, and a body of research is growing in Europe and Canada, little has been done in other regions including in Australia (Karatekin et al.,
2022). Towards this aim, a recent Australian study of four ACEs (family violence, household mental illness, household substance abuse, parental separation/divorce) by O’Connor and colleagues (
2020), alongside five other adversities (legal problems, harsh parenting, unsafe neighbourhood, family member death), found that 53% of Australian children experience two or more of these nine types of adversity by age 10–11 years. The international and emerging Australian literature therefore indicate that adversity is prevalent in Australia, and future exploration is warranted to better prevent ACEs and mitigate their potentially far-reaching impacts.
The Social and Economic Context of Adversity
Across the world, adversity is present in all geographic areas, regardless of socioeconomic status, and in all families regardless of income, parental employment, educational attainment, or ethnicity (Bellis et al.,
2014b; Shaefer et al.,
2018; Soares et al.,
2016). Consistent with this international literature, emerging Australian evidence indicates that adversity may be present in Australian families regardless of the remoteness or socioeconomic status (SES) of the area in which they live, or their ethnicity (Australian Institute of Health and Welfare,
2018; O’Connor et al.,
2020).
While adversity may be found in all sectors of society, some demographic characteristics have been associated with a greater risk. Learning from international evidence, we may hypothesise that children may have a higher risk for experiencing multiple types of adversity if they live in a low income household (Dhondt et al.,
2019; Shaefer et al.,
2018; Soares et al.,
2016), or if they have parents with low levels of education (Dhondt et al.,
2019; Soares et al.,
2016) or employment (Maitoza,
2019). Children may additionally have increased risk for adversity if they have an ethnic minority background, however this association may differ depending on the type/s of adversity and the measures of ethnicity used, which may include self-ascribed ethnicity (Bellis, et al.,
2014b), skin colour (Soares et al.,
2016), country of birth, and the language spoken in the family home (O’Connor et al.,
2020). In Australia, such evidence is scarce, however the O’Connor et al. (
2020) study of 5107 children from the Longitudinal Study of Australian Children found that children tended to have higher levels of adversity if they had parents who were born in countries that were assumed to be non-white and/or where they did not speak English at home. This study also found that Indigenous children are at increased risk for adversity, as are children who live in families with low socioeconomic status (i.e., where parents have low levels of education and income, and have occupations that are low in skill and prestige; O’Connor et al.,
2020). These findings are supported by administrative data from Australian Child Protection agencies, which indicate that child maltreatment is more prevalent among Indigenous children, and children living in lower SES areas, as well as remote or very remote areas (Australian Institute of Health and Welfare,
2017a).
While evidence on the mechanisms for the link between demographic characteristics and cumulative adversity is lacking, there has been some exploration of the mechanisms for individual adversities. Theories of social selection and social stress in mental health may therefore be helpful in understanding the links between demographic characteristics and adversity (Walsh et al.,
2013). The social selection model suggests that adversity may contribute to parents having lower capacity for education and employment, which subsequently leads to a lower household income and living in a lower SES area (which may be cheaper to live in and have other people with similar levels of education, employment, and income). The social stress model indicates that the stresses of living in a low SES area (e.g., discrimination, poor quality housing, high crime rates), having poor access to support services (e.g., due to low education, low income, and low proximity), and having limited personal resources (i.e., low income, reduced opportunity, housing instability), may precipitate, exacerbate, or perpetuate adversities such as problems with relationships, mental health, and substance use. Social selection and social stress may form a feedback loop (wherein selection increases stress and vice versa) that worsens over time and persists over generations, leading to entrenched disadvantage and intergenerational adversity (Schoon & Melis,
2019).
The extant evidence and theory therefore indicate that family-level and area-level demographic characteristics may be linked to increased risk for adversity in complex ways. There are, however, key limitations to the available evidence. Unfortunately, the Australian child protection data do not distinguish between different kinds of maltreatment, or indicate what demographic factors may be related to risk for cumulative adversity (Australian Institute of Health and Welfare,
2017a). While the O’Connor et al. (
2020) paper provides useful insights to what these demographic factors might be, its results pertain to ACEs and other types of adversity captured to age 10/11 only, and a composite measure of socioeconomic status that does not allow for the individual effects of education, employment and income to be ascertained. It is therefore important that further study be conducted into the relationships between demographic characteristics and ACEs within the Australian context, as it should not be assumed that international evidence is directly translatable to the unique Australian demographic landscape. Such research would benefit from exploring the effects of adversity occurring in adolescence as well as childhood, to account for potential differences in ACEs’ prevalence between these life stages (Wolitzky-Taylor et al.,
2017), and to better align with widely-used definition of ACEs as occurring in the first 18 years of life (Felitti et al.,
1998; Kalmakis & Chandler,
2015).
Although Australia is the sixth largest country in the world (Geoscience Australia,
2014) and has the third lowest population density globally (The World Bank,
2020), 85% of its 25 million residents live within 50 kilometres of the coastline, and only one quarter of the population reside outside of the seven major cities (Australian Bureau of Statistics,
2020). The Australian population rank sixth and eighth for tertiary education and employment rates among OECD countries, respectively (OECD,
2022a,
2022b). It is a culturally diverse country, with almost half of all Australians (49%) either born overseas or having parent/s born overseas (Australian Bureau of Statistics,
2017a), ranking it third among OECD countries for overseas-born population (OECD,
2018). In addition, approximately 4% of the population are Aboriginal or Torres Strait Islander; Indigenous peoples unique to this country (Australian Bureau of Statistics,
2022). Income inequality in Australia is higher than in most developed economies (OECD,
2021), and entrenched disadvantage (including multi-generational welfare dependence, low employment, low educational attainment) is experienced by families and communities across Australia, with at-risk groups including culturally and linguistically diverse populations, Aboriginal and Torres Strait Islander peoples, and Australians living in regional and remote areas (House of Representatives Select Committee on Intergenerational Welfare Dependence,
2019). Many of the demographic characteristics previously found to be associated with risk for adversity (e.g., low education, low income, ethnic minority status) may therefore have prevalence rates and inter-relationships in the Australian context that differ from those found in other countries. This unique demographic context means that it is critical that Australian-specific research be conducted to identify how demographic characteristics may contribute to risk that adversity will affect Australian families.
While the available evidence provides an indication of the prevalence of adversity and the demographic characteristics that may be associated with adversity in Australia, evidence is however lacking regarding the associations between demographic factors and multiple (i.e., cumulative) adversities in the Australian context among nationally representative samples of children across the full 0- to 18-years age range. Research is required to determine whether Australian children are likely to experience more adversity if they have the demographic characteristics previously identified as being associated with increased risk for adversity across the extant international and/or Australian literature (i.e., low area SES, living in a remote area, low income, ethnic minority status, Indigenous status, low parental employment and education). A more cohesive and comprehensive evidence base may inform research, policy, and practice, to provide crucial supports for Australian families and children at risk for adversity and its related outcomes.
Discussion
This study used a secondary data source to provide new evidence around ACEs in Australia, and insights to the prevalence of adversity in children and associated risk and protective factors. The Australian government-administered National Health Survey 2014–15 dataset used for analysis (Australian Bureau of Statistics,
2017b) included three household dysfunction ACEs: having a single parent, living with someone with a mental health condition, and living with someone with a substance use problem. The two key aims were to: 1) investigate the prevalence of these three adversities across Australia; and 2) identify demographic characteristics associated with an increased risk for ACEs.
Although the current paper was only able to capture three of the ten ACEs described by Felitti and colleagues (
1998), results indicated that over one-third of respondents reported at least one adversity, while one in twelve reported two or more adversities. These estimates were similar to international estimates of one-half to two-thirds of children experiencing at least one ACE (Kalmakis & Chandler,
2015); but are lower than international estimates of children with two or more ACEs (i.e., one-fifth to one-third of children, Bellis et al.,
2019). This is likely attributable to the limited number of ACEs captured in the current study, and a lower-than-expected reporting of substance use problems. The small number of reported substance use problems may reflect a true low prevalence of this adversity in this sample, however, the narrow definition of substance use, and problems with social desirability bias, may have contributed to under-reporting. Even with this potential limitation, the overall prevalence rates were similar to those from international studies (Bellis et al.,
2019; Kalmakis & Chandler,
2015), indicating that international estimates and studies may have some usefulness in understanding adversity in Australia. Overall, these results show that even when only three of the ten ACEs are measured, national data indicates that adversity is affecting many children and families across Australia. It is likely that the prevalence estimates would be much higher if more types of adversity were captured. At the time of writing, however, no large datasets from population surveys that are publicly collected and available in Australia contain data on more than three ACEs. This limited scope is problematic as it precludes research regarding people who experience four or more adversities, who may be particularly at risk for poor outcomes (Felitti et al.,
1998). With each type of adversity having unique and cumulative effects across the life course (Kalmakis & Chandler,
2015), and the current results indicating that adversity affects at least one-third of Australian families, it is critical that the prevalence and correlates of all ten ACEs be explored in Australia in the future.
Recent Australian research has shown that adversity occurs across ethnic groups and area-level socioeconomic contexts (O’Connor et al.,
2020), as has previously been found in England (Bellis et al.,
2014b). The current paper extends these findings by including additional demographic characteristics and indicating that adversity occurs in a broad range of contexts. Across the demographic characteristics measured in this study, no category was exempt from adversity. It was found in every state and territory, from major cities to remote Australia, across the most and the least disadvantaged areas; regardless of language, employment, or education.
To better understand how such contexts might relate to children’s risk for adversity, the relationships between demographic characteristics and adversity were explored. Previous international and Australian literature has identified a range of demographic characteristics that may be associated with singular or multiple adversities. It was hypothesised that these same demographic characteristics would be associated with adversity in this Australian sample. Results partially supported this hypothesis. In both the absence and presence of other demographic characteristics, higher levels of adversity were associated with lower area SES and household incomes; having a parent who was unemployed or NITLF, or had less than 12 years of schooling; and mainly speaking English at home. The results regarding the socioeconomic demographic characteristics (i.e., area SES, household income, employment, and education) were as expected, based on international literature that has indicated that children whose parents have these characteristics may be more at risk for adversity (Soares et al.,
2016); and Australian evidence for the links between adversity and the socioeconomic status of families (O’Connor et al.,
2020) and the area in which they live (Australian Institute of Health and Welfare,
2017b). The current results reveal that parents were more likely to be single parents, have mental health concerns, and/or have substance use problems if they held these demographic characteristics that contribute to low socioeconomic status. The observed association may be bidirectional or cyclical, with the stresses of low socioeconomic status (e.g., low personal resources, poor access to services, dealing with crime and discrimination) impeding functioning in areas such as interpersonal relationships, mental health and substance use, therefore leading to adversity; and adversity reducing parents’ capacity for education and employment, leading to a lower household income and living in a low SES area. It is important to note, however, that as these demographic characteristics were not too highly correlated with one another, it does not appear that any one characteristic necessarily follows another (e.g., low education causing low employment) in influencing risk for adversity. Similarly, the significant multivariate results indicate that it is not a single underlying construct that is driving the relationships between these socioeconomic demographic characteristics (as the shared variance has been portioned out). The links between adversity and individual- and area-level socioeconomic demographic characteristics therefore appear to be important to consider together and independently. An additional complexity is the potential role of the inter-generational continuity of adversity, as parents who have experienced adversity are more likely to have poor socioeconomic outcomes (Hardcastle et al.,
2018), and inter- and intra-personal issues that may contribute to their children experiencing adversity (Bellis et al.,
2019; Schofield et al.,
2018). Future research may investigate the mechanisms by which these characteristics are associated with adversity; and how the convergence of family characteristics and adversity influence outcomes. Such research may provide insights to points of vulnerability that may be targeted to prevent adversity and reduce its impact across the life course.
The finding that higher adversity was associated with lower levels of education and employment has additional implications for the interpretation of the adversity prevalence rates found in this study. As the prevalence rates were derived from a sample that is slightly more educated and employed in comparison to the Australian population (Australian Bureau of Statistics,
2016a), ACEs may be even more prevalent in the Australian population than in this sample. Further research using nationally representative samples, capturing a greater range of adversities is required to provide more accurate estimates of the prevalence of adversity in Australia.
In contrast to the results regarding the included socioeconomic factors, the findings around English-speaking households were unexpected. Although previous Australian research has indicated that adversity may be more prevalent in ethnic minority households (O’Connor et al.,
2020), the current results indicated that English-speaking families may be more at risk for adversity. This discrepancy adds to the already-mixed evidence for the relationship between ethnicity and adversity. One potential reason for differences in this area relates to measurement. O’Connor and colleagues (
2020) measured ethnic minority in an Australian sample using language and country of birth, and measured nine types of adversity. In contrast, the current study used only language, and measured three types of adversity. Thus factors such as country of birth may be the main driver behind the previously identified link between ethnic minority status and adversity; and/or it is possible that ethnic minority families are more at risk for adversities other than single parenthood, mental health conditions and substance use problems. This would in part be consistent with Bellis et al. (
2014b), wherein in their nationally representative survey of English residents aged 18 to 69 found that white respondents reported more household mental illness than Asian or “other” ethnicity respondents, while other adversities varied across the three ethnic groups, with rates of adversity generally lower for Asian respondents. As the ethnic profile of each country is idiosyncratic, it may not be possible to extrapolate the results of international studies to Australia. Further, while other characteristics are measured as “relative” characteristics (e.g., relatively higher or lower income), ethnicity is often measured as descriptive characteristics (e.g., white or non-white); which do not consider the meaning of ethnicity. It is therefore important to interpret results regarding ethnicity within their given context. Future research is required to explore the relationship between ethnicity and adversity in the Australian context, using a sample with a more representative mix of ethnicities than is provided in the current sample.
Remoteness was another factor that had associations with adversity that were unexpected. It was hypothesised that respondents living in major cities would experience less adversity than respondents living in more remote areas. Although the hypothesis was supported by bivariate analyses, once the effects of other demographic characteristics were taken into account, the additional partial effect of living in a major city was associated with greater adversity. It may therefore not be remoteness itself, but rather the sociodemographic factors that co-occur with remoteness, that are conferring risk to rural and remote areas. These results are in partial agreement and partial contrast with international evidence. While the current results show major cities to be associated with adversity only after controlling for other factors, a recent paper from Marryat and Frank (
2019) drew on a national sample of Scottish children (
N = 3119) to show that living in a major city was associated with greater risk for ACEs than living rurally, both before and after controlling for factors such as income, area SES, and education. The current results also partially align with US studies using national samples, which found that rural children had an overall higher prevalence of adversity than urban children (similar to the current study), but (unlike the current study) found no differences between urban and rural prevalence rates after accounting for the effects of poverty (Crouch et al.,
2020), or after controlling for sex, age, and ethnicity (Talbot et al.,
2016). In addition, the results support literature that highlights the complex inter-relationships between remoteness and socioeconomic status in Australia (Inder et al.,
2011). Taken together, the mixed results from the extant evidence, including this study, suggest that the relationship between geographic location and adversity is complex and potentially influenced by factors associated with the broader community context. Further research is therefore required to explore the inter-relationships between remoteness, other demographic characteristics, and adversity in both the international and Australian context.
Overall, the results indicate that adversity is experienced by children across all demographic contexts, with a range of social and economic factors associated with an increased risk for adversity. The results highlight that although specific known demographic characteristics may place children and families at greater risk for adversity, adversity may occur for people with a wide variety of demographic characteristics, not just the characteristics previously identified as related to risk. These characteristics span many domains and levels of measurement (i.e., the geographic area, the household, and the individual). It is therefore important that research on adversity explores the impact of demographic characteristics across geographic area, household, and individual levels. Services and policies that aim to support families and address adversity in the Australian context may benefit from utilising a blend of population-based and targeted approaches, known as progressive universalism (Marmot,
2013; Prinz,
2015) or targeted universalism (Powell et al.,
2019). This blended approach has previously been found to be an effective strategy for addressing large-scale public health matters such as mental health (Barry,
2019) and family functioning (Frost et al.,
2015); and involves providing a broad suite of supports to the whole population, with supplementary supports offered to those with additional needs (Marmot,
2013). With adversity affecting families across Australia, and some families at increased risk due to demographic characteristics, a progressive universalist approach to service delivery and policy making may be most effective at supporting these families to prevent adversity and its harms.
Strengths and Limitations
There are a few points to consider when interpreting the results of this paper’s analysis. Firstly, the number of adversities captured in the dataset is limited to three of the ten ACEs (Felitti et al.,
1998). As the different types of adversity can have differing relationships with demographic characteristics (Walsh et al.,
2019), it is important to interpret the results of this paper as referring to the characteristics associated with increased prevalence of single parenthood, mental health conditions, and substance use problems. Further, the data collection method and scope of the items may under-represent the prevalence of adversity. This is due to social desirability bias (respondents declining to report dysfunction), selection bias (individuals dealing with multiple challenges are not as likely to participate in research), and limited scope (data captures only three adversities pertaining to one adult in the household).
Adversities that involve persons other than the responding adult, or that occur outside of the reference period of the survey (e.g., the period of time around data collection) are also not captured in the NHS 14-15 data. This would likely result in further under-estimation of adversity in this sample. Previous ACE literature has shown that adversities experienced at any time in a child’s first 18 years of life have significant impact on their health and wellbeing (Giovanelli,
2018), as may adversities pertaining to persons other than one’s primary caregiver (Asmussen et al.,
2020). As such, future research should aim to determine the lifetime prevalence of childhood adversities in Australia, including those that relate to a broader range of household members, such as other parents, caregivers, and siblings. It is important to note that the cross-sectional nature of the NHS 14-15 precludes study of directionality or time/order effects, although it can be used to provide powerful cross-sectional insights, due to its large, national sample. The restrictions of the now-decommissioned Remote Access Data Laboratory prevented the estimation or exploration of missing data, and thus only complete cases were included in the regression analyses. As the resulting exclusion of 15% of the dataset gave a final sample of over 3000 participants, there would not have been a significant loss of power to detect significant effects, however the obtained estimates may have been biased by the use of complete case analysis. In addition, as sample weights were not utilised, the analyses did not adjust for the relative importance or representativeness of cases or variables. It is however important to note that because many of the variables used to benchmark the weights were included as predictors in the main analysis, potential use of weights may have introduced redundant or collinear information without providing additional insights or improving accuracy. The general alignment of the analytic sample’s demographic characteristics with the Australian population (see Table
2), and of the obtained results with extant evidence and theory, indicate that the estimates were not likely substantially biased, however, future analyses using other methods for handling missing data and weighting may serve to further support or clarify the observed results.
Despite issues of limited scope and potential under-reporting, the current results indicate that adversity is highly prevalent in Australia. With only limited evidence available on ACEs in this country, there is a great need for further data collection and research in this area. Future work that is less restricted by limitations may reveal higher prevalence rates and different demographic correlates. This would provide a more accurate and comprehensive picture of the adversities faced by families in this country, and valuable insights to the characteristics of the families who may be affected. Such information may be valuable for targeting and developing supports for families, to prevent adversity and ameliorate its effects.
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