Philip Burgess

Post-traumatic stress disorder: findings from the Australian National Survey of Mental Health and Well-being

BACKGROUND We report on the epidemiology of post-traumatic stress disorder (PTSD) in the Australian community, including information on lifetime exposure to trauma, 12-month prevalence of PTSD, sociodemographic correlates and co-morbidity. METHODS Data were obtained from a stratified sample of 10,641 participants as part of the Australian National Survey of Mental Health and Well-being. A modified version of the Composite International Diagnostic Interview was used to determine the presence of PTSD, as well as other DSM-IV anxiety, affective and substance use disorders. RESULTS The estimated 12-month prevalence of PTSD was 1-33%, which is considerably lower than that found in comparable North American studies. Although females were at greater risk than males within the subsample of those who had experienced trauma, the large gender differences noted in some recent epidemiological research were not replicated. Prevalence was elevated among the never married and previously married respondents, and was lower among those aged over 55. For both men and women, rape and sexual molestation were the traumatic events most likely to be associated with PTSD. A high level of Axis 1 co-morbidity was found among those persons with PTSD. CONCLUSIONS PTSD is a highly prevalent disorder in the Australian community and is routinely associated with high rates of anxiety, depression and substance disorders. Future research is needed to investigate rates among other populations outside the North American continent.

Reaction to trauma: A cognitive processing model

Integrated existing cognitive processing models of posttrauma reactions into a longitudinal model. Data were obtained after a multiple shooting in a city office block. The S group comprised 158 office workers who were in the building at the time of the shootings. The methodology of this research was a repeated measures survey, with data collection at 4, 8, and 14 mo posttrauma. Measures included the Impact of Events Scale (IES) and the SCL-90--Revised. A path analysis was performed with the IES as an indication of cognitive processing. Intrusion and avoidance were shown to mediate between exposure to trauma and symptom development. Intrusion was also found to be negatively related to subsequent symptom levels. The findings provide provisional support for a cognitive processing model. (PsycINFO Database Record (c) 2008 APA, all rights reserved)

Service use for mental health problems: findings from the 2007 National Survey of Mental Health and Wellbeing

Objectives: To provide an overview of 12 month rates of service use for mental health problems and mental disorders by the general Australian adult population. Method: Data came from the 2007 National Survey of Mental Health and Wellbeing (2007 NSMHWB), a nationally representative household survey of 8841 individuals aged between 16 and 85 years. Results: Overall, 11.9% of the general Australian adult population made use of any services for mental health problems in a 12 month period. Approximately one-third of people (34.9%) meeting criteria for a mental disorder did so. Female subjects with mental disorders were more likely to use services than male subjects (40.7% vs 27.5%). People in the youngest age group made relatively less use of services than older adults. Those with affective disorders were most likely to make use of services (58.6%), followed by those with anxiety (37.8%) and substance use disorders (24.0%), respectively. Mental health hospitalizations were less common than consultations with community-based providers (2.6%), whereas 34.6% consulted a community-based provider – particularly general practitioners (24.7%) and psychologists (13.2%). There was a clear dose-response effect between severity of disorders and rates of community-based service use: 63.5% of those with severe mental disorders used community-based services, compared with 40.2% and 17.7% of those with moderate and mild mental disorders, respectively. There was also a relationship between comorbidity of mental disorders and service use. Conclusions: Rates of service use for mental health problems among those with mental disorders in Australia are less than optimal. Little international guidance is available regarding appropriate levels of treatment coverage and other comparable countries face similar difficulties. Further work is required to determine what an appropriate rate of service use is, and to set targets to reach that rate. Australia has demonstrated that concerted policy efforts can improve rates of service use. These efforts should be expanded.

Suicidal ideation and suicide attempts among Australian adults.

Too little is known about suicidal thoughts and behaviors at a population level to recommend appropriate preventive strategies. Using data from the Australian National Survey of Mental Health and Wellbeing (NSMHWB), this study examined rates of, and risk factors for, suicidal ideation and suicide attempts. For 10,641 respondents, the 12-month and lifetime cumulative incidence rates of suicidal ideation were 3.4% and 16.0%, respectively; the 12-month and lifetime cumulative incidence rates of suicide attempts were 0.4% and 3.6%, respectively. 12-month ideation was associated with anxiety disorders (relative risk ratio [RRR] = 3.51; population attributable risk percent [PAR%] = 19.6%), affective disorders (RRR = 11.94; PAR% = 38.8%) and substance abuse disorders (RRR = 1.85; PAR% = 6.1%). Attempts in the past 12 months were also associated with anxiety disorders (RRR = 7.06; PAR% = 37.0%), affective disorders (RRR = 12.24; PAR% = 39.5%), and substance abuse disorders (RRR = 2.09; PAR% = 7.7%). Age, marital status, and disability were associated with ideation; marital status and employment status with attempts. Approximately 12% of ideators in the sample progressed to making an attempt; employment status was the only significant predictor. Reducing suicidal ideation and attempts requires a multi-faceted approach that targets those with mental illness but also adopts population-based strategies that address other factors, such as unemployment.

Personality disorders in the community: a report from the Australian National Survey of Mental Health and Wellbeing

Background: The first set of aims of the present study was to determine the prevalence of personality disorders (PDs) in a nation, and gender differences in the types and numbers of PDs endorsed. The second set of aims was to establish the relationship of PD to other, non-PD disorders, physical conditions, and disability. Method: Data were obtained from the Australian National Survey of Mental Health and Wellbeing, conducted between May and August 1997. A stratified random sample of households was generated, from which all those aged 18 or over were considered potential interviewees. There were 10,641 respondents to the survey, and this represented a response rate of 78%. Each interviewee was asked 59 questions indexing specific ICD-10 PD criteria. Results: Of the total survey sample, 704 persons had at least one PD. Using weighted replicate weights, it was estimated that approximately 6.5% of the adult population of Australia have one or more PDs (lifetime prevalence). Persons with PD were more likely to be younger, male, and not married, and to have an anxiety disorder, an affective disorder, a substance use disorder, or a physical condition. They were also more likely to have greater disability than those without PD. Conclusion: The study is the first nation-wide survey of mental disorders conducted within Australia. It provides an estimate of the prevalence of the various types of PD. The survey has considerable limitations, however, and these are discussed.

Kessler Psychological Distress Scale: normative data from the 2007 Australian National Survey of Mental Health and Wellbeing

Objective: To present Australian normative data on the ten-item Kessler Psychological Distress Scale (K10). Method: Analysis of cross-sectional data from the 2007 Australian National Survey of Mental Health and Wellbeing, a nationally representative household survey of 8841 adults. Mean K10 scores and K10 scores at selected percentiles of the K10 score distribution are presented by sex, age, the presence of mental disorders and the presence of physical conditions. Stratum-specific likelihood ratios were computed to help clinicians and researchers calculate predicted probabilities of mental disorder given scores on the K10. Results: Scores on the K10 were generally higher in women compared to men, in people with a mental disorder compared to without a mental disorder and in people with affective disorders compared to people with substance use disorders. The SSLRs were informative in ruling in a diagnosis of mental disorder, particularly at the high or very high end of the psychological distress spectrum. Conclusions: These data may be helpful for clinicians and researchers alike in understanding the likelihood of mental disorder in a given individual or sample.

Assessing the value of existing recovery measures for routine use in Australian mental health services

Object: The concept of recovery has been recognized as important in the treatment of mental illness. A number of specific instruments exist which are designed to: (i) measure recovery at an individual level; and (ii) assess the recovery orientation of services. The current review aimed to identify these and evaluate their potential for routine use in Australian public sector mental health services. Method: We identified potential instruments by drawing on existing reviews, searching MEDLINE and PsycINFO, and consulting with experts. We used a hierarchical criterion-based approach to assess whether given instruments might be candidates for measuring recovery in the Australian context. Results: We identified 33 instruments: 22 designed to measure individuals’ recovery and 11 designed to assess the recovery orientation of services (or providers). Four of the former (Recovery Assessment Scale; Illness Management and Recovery Scales; Stages of Recovery Instrument; Recovery Process Inventory) and four of the latter (Recovery Oriented Systems Indicators Measure; Recovery Self Assessment; Recovery Oriented Practices Index; Recovery Promotion Fidelity Scale) were identified as promising candidates for routine use in Australian public sector mental health services. Conclusions: Further work is required, however, to determine which, if any, might best be used for this purpose; the possibility that modifications to existing instruments or the development of new instruments might be required should not be ruled out. It might be desirable to invest in two instruments: one designed to measure individuals’ recovery and one designed to measure the recovery orientation of services. If Australia were to go down this path, it would make sense to align indicators in each as far as possible, and to ensure that they were consistent with existing endeavours aimed at monitoring and improving recovery-focused aspects of service quality.

Suicidal thoughts and behaviours among Australian adults: findings from the 2007 National Survey of Mental Health and Wellbeing

Objectives: To provide an overview of the lifetime and 12 month prevalence of suicidal ideation, suicide plans and suicide attempts for Australian adults as a whole and for particular sociodemographic and clinical population subgroups, and to explore the health service use of people with suicidality. Method: Data came from the 2007 National Survey of Mental Health and Wellbeing (2007 NSMHWB), a nationally, representative household survey of 8841 individuals aged 16–85 years. Results: A total of 13.3% of respondents had suicidal ideation during their lifetime, 4.0% had made a suicide plan and 3.2% had made a suicide attempt. The equivalent 12 month prevalence rates were 2.3%, 0.6% and 0.4%, for ideation, plans and attempts, respectively. In general, suicidality in the previous 12 months tended to be relatively more common in women, younger people, those outside the labour force, and those with mental disorders; and less common in those who were married or in de facto relationships, and those with moderate levels of education. A number of the differences in prevalence rates between sociodemographic and clinical subgroups did not reach statistical significance due to data availability constraints and the conservative tests of significance that were used by necessity. These patterns warrant further exploration. Service use for mental health problems was higher among people with suicidality than it was among the general population, but significant numbers of those experiencing suicidality did not receive treatment. Conclusions: Suicidal thoughts and behaviours are not uncommon among the Australian adult population. These thoughts and behaviours are not only predictive of subsequent fatal suicidal acts, but are significant public health problems in their own right. They are associated with high levels of burden at an individual and societal level. Further analysis is required to assess the effectiveness of the national policy frameworks in reducing the spectrum of suicidal thoughts and behaviours.

Perceived need for mental health care, findings from the Australian National Survey of Mental Health and Well-being

BACKGROUND The Australian National Survey of Mental Health and Well-being was designed to detect and describe psychiatric morbidity, associated disability, service use and perceived need for care. The survey employed a single-phase interview methodology, delivering a field questionnaire to a clustered probability sample of 10,641 Australians. Perceived need was sampled with an instrument designed for this survey, the Perceived Need for Care Questionnaire (PNCQ). This questionnaire gathers information about five categories of perceived need, assigning each to one of four levels of perceived need. Reliability and validity studies showed satisfactory performance of the instrument. METHODS Perceived need for mental health care in the Australian population has been analysed using PNCQ data, relating this to diagnostic and service utilization data from the above survey. RESULTS The survey findings indicate that an estimated 13.8% of the Australian population have perceived need for mental health care. Those who met interview criteria for a psychiatric diagnosis and also expressed perceived need make up 9.9% of the population. An estimated 11.0% of the population are cases of untreated prevalence, a minority (3.6% of the population) of whom expressed perceived need for mental health care. Among persons using services, those without a psychiatric diagnosis based on interview criteria (4.4% of the population), showed high levels of perceived met need. CONCLUSIONS The overall rate of perceived need found by this methodology lies between those found in the USA and Canada. The findings suggest that service use in the absence of diagnosis elicited by survey questionnaires may often represent successful intervention. In the survey, untreated prevalence was commonly not accompanied by perceived need for mental health care.

Affective and anxiety disorders: prevalence, treatment and antidepressant medication use

Objective: The aim of the present study was to investigate the prevalence and treatment of affective and anxiety disorders in adults in Australia and compare these with the dispensed prescriptions of drugs used to treat these disorders. Methods: Analysis was done of the 2007 National Survey of Mental Health and Wellbeing regarding 12 month prevalence and treatment for affective and anxiety disorders and Pharmaceutical Benefits Scheme prescribing data for antidepressants for 2002–2007. The main outcome measures were prevalence and treatment (rates per 1000 population) and antidepressant utilization (defined daily dose 1000 population−1 day–1) by gender and age (5 and 10 year age groups). Results: The prevalence and treatment of affective and anxiety disorder are highest in those aged <50, after which it declines rapidly. Rates for both are higher in women than men. Overall antidepressant use increased 41% over the study period (selective serotonin re-uptake inhibitors 44%, venlafaxine 75%). Sertraline held the majority of the market, followed by venlafaxine and citalopram. Utilization of antidepressants had a bimodal distribution with peaks in those aged in their late 50s and early 90s. The peak use of antidepressants was in those aged 90–94 years. Conclusion: There is poor alignment between the prevalence and self-reported treatment of affective and anxiety disorders in the community and the prescribing of medications for these disorders. It appears that older Australians are receiving antidepressant medications for reasons other than the treatment of conditions for which these drugs have marketing approval or for depressive and anxiety symptoms that do not reach the threshold for a diagnosis.